Ragnar Larsson

Professor at Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Ragnar Larsson is professor in computational material mechanics. He is heading the division for material and computational mechanics. The focus of the research is within continuum and material mechanics with emphasis on modeling/simulation of "localized deformation", such as crack propagation, using numerical methods (computational material and failure mechanics). Ragnar also works with porous materials modeling linked to interaction with fluid or gas phases. The applications are in automotive safety (crashworthiness), machining and simulation of composite materials.

Source: chalmers.se

Projects

2013–2020

Modellering av krockbeteendet i framtida lättviktsfordon

Ragnar Larsson Material and Computational Mechanics
Johannes Främby Material and Computational Mechanics
Martin Fagerström Material and Computational Mechanics
Jim Brouzoulis Material and Computational Mechanics
VINNOVA

2011–2013

Snabba deformationsförlopp vid maskinbearbetning och containment

Christer Persson Materials Technology
Ragnar Larsson Material and Computational Mechanics
VINNOVA

2014–2017

A shell theory based on two-phase porous media for process modeling of structural composites

Ragnar Larsson Material and Computational Mechanics
Swedish Research Council (VR)

2013–2018

Efficient design methodology for composite vehicle structures through numerical simulations

Ragnar Larsson Material and Computational Mechanics
Swedish Research Council (VR)

1 publication exists
2013–2015

Prediktering av termomekanisk utmattning av superlegeringskomponenter

Ragnar Larsson Material and Computational Mechanics
VINNOVA

2013–2017

Kompressionsbrott i komplexa NCF kompositstrukturer - KOMPRESS

Ragnar Larsson Material and Computational Mechanics
VINNOVA

There might be more projects where Ragnar Larsson participates, but you have to be logged in as a Chalmers employee to see them.

Publications

2016

Mesh objective continuum damage models for ductile fracture

Ragnar Larsson, SENAD RAZANICA, Lennart Josefson
International Journal for Numerical Methods in Engineering. Vol. 106 (10), p. 840-860
Journal article
2016

Damage growth in compressive loadded fibre reinforced composites

Ragnar Larsson, Renaud Gutkin, Mohammad Sadegh Rouhi
Paper in proceedings
2016

Holistic modeling of composites manufacturing using poromechanics

Mohammad Sadegh Rouhi, Maciej Wysocki, Ragnar Larsson
Advanced Manufacturing: Polymer & Composites Science
Journal article
2016

Mesh objective damage modeling of ductile fracture at visco-plastic continuum response

SENAD RAZANICA, Ragnar Larsson, Lennart Josefson
ECCOMAS Congress 2016 - Proceedings of the 7th European Congress on Computational Methods in Applied Sciences and Engineering. Vol. 1, p. 209-215
Paper in proceedings
2016

Modelling of kink-band growth based on the geometrically non-linear theory

Ragnar Larsson, Mohammad Sadegh Rouhi, Renaud Gutkin
Paper in proceedings
2016

XFEM based element subscale refinement for detailed representation of crack propagation in large scale analyses

Salar Mostofizadeh, Martin Fagerström, Ragnar Larsson
International Journal for Numerical Methods in Engineering. Vol. 10 (6), p. 549-572
Journal article
2015

Experimental assessment of coupled dual-scale flow-deformation processes in composites manufacturing

Mohammad Sadegh Rouhi, Maciej Wysocki, Ragnar Larsson
Composites Part A: Applied Science and Manufacturing. Vol. 76, p. 215-223
Journal article
2015

Mesh objective models for ductile fracture based on a damage phase field concept

SENAD RAZANICA, Ragnar Larsson, Lennart Josefson
Conference contribution
2014

PREDICTION OF THROUGH-THICKNESS STRESS DISTRIBUTION IN LAMINATED SHELL STRUCTURES

Johannes Främby, Jim Brouzoulis, Martin Fagerström et al
Paper in proceedings
2014

Poromechanical modelling the pre- and post-filling flows in composite manufacturing

Ragnar Larsson, Mohammad Sadegh Rouhi, Maciej Wysocki
Paper in proceedings
2014

Ductile fracture modeling based on a mesh objective element removal technology

SENAD RAZANICA, Ragnar Larsson, Lennart Josefson
14th European Mechanics of Materials Conference - EMMC14, 27-29 Aug. 2014, Gothenburg, Sweden
Conference contribution
2014

On the subscale enrichment of crack tip element in XFEM and the phantom node method

Salar Mostofizadeh, Bert Sluys, Ragnar Larsson et al
Paper in proceedings
2014

A FE based machining simulation methodology accounting for cast iron microstructure

Goran Ljustina, Ragnar Larsson, Martin Fagerström
Finite Elements in Analysis and Design. Vol. 80, p. 1-10
Journal article
2014

Fracture modeling of composite laminates based on phase field damage evolution in shell kinematics

Ragnar Larsson, Jim Brouzoulis, Martin Fagerström
Paper in proceedings
2014

A fully coupled multiscale shell formulation for the modelling of fibre reinforced laminates

Johannes Främby, Jim Brouzoulis, Martin Fagerström et al
Paper in proceedings
2014

Process modeling of composite materials - a holistic and generic simulation tool using poromechanics

Mohammad Sadegh Rouhi, Maciej Wysocki, Ragnar Larsson
Paper in proceedings
2014

Rate Sensitive Continuum Damage Models and Mesh Dependence in Finite Element Analyses

Goran Ljustina, Martin Fagerström, Ragnar Larsson
The Scientific World Journal. Vol. 2014
Journal article
2013

Dynamic crack propagation in elastoplastic thin-walled structures: Modelling and validation

Salar Mostofizadeh, Martin Fagerström, Ragnar Larsson
International Journal for Numerical Methods in Engineering. Vol. 96 (2), p. 63-86
Journal article
2013

Modeling of coupled dual-scale flow–deformation processes in composites manufacturing

Mohammad Sadegh Rouhi, Maciej Wysocki, Ragnar Larsson
Composites Part A: Applied Science and Manufacturing. Vol. 46 (1), p. 108-116
Journal article
2013

Rate Sensitive Continuum Damage Models and Mesh Dependence in Finite Element Analyses

Ragnar Larsson, Goran Ljustina, Martin Fagerström
3rd International Conference on Material Modeling, p. 253-
Paper in proceedings
2013

Rate Sensitive Continuum Damage Models and Mesh Dependence in Finite Element Analyses

Goran Ljustina, Martin Fagerström, Ragnar Larsson
MekIT'13 Seventh National Conference on Computational Mechanics, p. 21-32
Paper in proceedings
2013

Modeling dual-scale flow-deformation processes in composites manufacturing

Mohammad Sadegh Rouhi, Maciej Wysocki, Ragnar Larsson
Paper in proceedings
2013

MODELLING DUAL-SCALE FLOW-DEFORMATION PROCESSES IN COMPOSITES MANUFACTURING

Mohammad Sadegh Rouhi, Maciej Wysocki, Ragnar Larsson
Paper in proceedings
2013

A stress-resultant shell theory based on multiscale homogenization

Ragnar Larsson, Mats L Landervik
Computer Methods in Applied Mechanics and Engineering. Vol. 263, p. 1-11
Journal article
2013

Subscale enrichment of discontinuity for XFEM crack tip element

Martin Fagerström, Salar Mostofizadeh, Ragnar Larsson
Conference contribution
2012

Hypo– and hyperinelasticity applied to modeling of compacted graphite iron machining simulations

Goran Ljustina, Martin Fagerström, Ragnar Larsson
European Journal of Mechanics, A/Solids. Vol. 37, p. 57-68
Journal article
2012

Modeling of Distortion during Casting and Machining of Aluminum Engine Blocks with Cast-in Gray Iron Liners

Johan Ahlström, Ragnar Larsson
Materials Performance and Characterization. Vol. 9 (5), p. 1-19
Journal article
2012

Dynamic ductile fracture in shells

Salar Mostofizadeh, Martin Fagerström, Ragnar Larsson et al
Paper in proceedings
2012

MODELING THE CONSTITUTIVE RESPONSE OF AN ANISOTROPIC DUAL-SCALE FLOW

Mohammad Sadegh Rouhi, Maciej Wysocki, Ragnar Larsson
Paper in proceedings
2012

Ductile dynamic fracture modeling using embedded strong discontinuities in CGI machining simulations

Ragnar Larsson, Goran Ljustina, Martin Fagerström
Paper in proceedings
2012

Ductile dynamic fracture modeling using embedded discontinuities in CGI machining simulations

Ragnar Larsson, Goran Ljustina, Martin Fagerström
Paper in proceedings
2012

CONSTITUTIVE MODELLING OF ANISOTROPIC TWO-SCALE FLOW

Mohammad Sadegh Rouhi, Maciej Wysocki, Ragnar Larsson
Paper in proceedings
2012

Continuum-molecular modelling of Graphene

Kaveh Samadikhah, Ragnar Larsson, Kim Bolton et al
Computational Materials Science. Vol. 53 (1), p. 37-43
Journal article
2012

Composite manufacturing modeling using porous media theory

Mohammad Sadegh Rouhi, Maciej Wysocki, Ragnar Larsson
25th Nordic Seminar on Computational Mechanics (NSCM25), Lund, Swede, 25-26 October 2012, p. 295-298
Paper in proceedings
2012

Ductile dynamic fracture modeling using embedded strong discontinuities in CGI machining simulations

Goran Ljustina, Ragnar Larsson, Martin Fagerström
Paper in proceedings
2011

Experiments and modelling of the cyclic behaviour of Haynes 282

Rebecka Brommesson, Lisa Grauers, Magnus Ekh et al
Conference contribution
2011

Free surface flow and preform deformation in composites manufacturing based on porous media theory

Ragnar Larsson, Mohammad Sadegh Rouhi, Maciej Wysocki
European Journal of Mechanics, A/Solids. Vol. 31 (1), p. 1-12
Journal article
2011

Atomistic continuum modeling of graphene membranes

Ragnar Larsson, Kaveh Samadikhah
Computational Materials Science. Vol. 50 (5), p. 1744-1753
Journal article
2011

Constitutive Modeling of CGI Machining Simulations

Goran Ljustina, Ragnar Larsson, Martin Fagerström
Paper in proceedings
2011

Modeling resin flow, preform deformations and residual stresses in RTM manufacturing

Mohammad Sadegh Rouhi, Ragnar Larsson, Maciej Wysocki
Paper in proceedings
2011

Dynamic Ductile Fracture in Thin-walled Structures based on XFEM

Ragnar Larsson, Salar Mostofizadeh, Jesus Mediavilla et al
Paper in proceedings
2011

Hypo-- and hyperinelasticity applied to modeling of compacted graphite iron machining simulations

Goran Ljustina, Martin Fagerström, Ragnar Larsson
Proceedings of the 24th nordic seminar on computational mechanics, p. 59-62
Paper in proceedings
2011

Resin Flow and Preform Deformation in Composites Manufacturing Based on a Partially Saturated Porous Medium

Ragnar Larsson, Mohammad Sadegh Rouhi, Maciej Wysocki
Paper in proceedings
2010

Modelling multiple scales in composites manufacturing

Maciej Wysocki, Ragnar Larsson, Staffan Toll
Paper in proceedings
2010

Constitutive modeling and validation of CGI machining

Goran Ljustina, Martin Fagerström, Ragnar Larsson
Conference contribution
2010

Infusion modelling using two-phase porous media theory

Ragnar Larsson, Mohammad Sadegh Rouhi, Maciej Wysocki
Paper in proceedings
2010

Modeling resin flow and preform deformation in composite manufacturing based on partially saturated porous media theory

Mohammad Sadegh Rouhi, Ragnar Larsson, Maciej Wysocki
Procedeing of 23rd Nordic Seminar on Computational Mechanics, p. 142-145
Paper in proceedings
2010

A cohesive zone formulation of fracturing shells based on XFEM

Martin Fagerström, Ragnar Larsson, Jesus Mediavilla
Paper in proceedings
2010

Continuum - Molecular Modeling of Graphene Lattice

Kaveh Samadikhah, Ragnar Larsson, Kim Bolton et al
Paper in proceedings
2010

Dynamic fracture modeling in shell structures based on XFEM

Ragnar Larsson, Jesus Mediavilla, Martin Fagerström
International Journal for Numerical Methods in Engineering. Vol. 86 (4-5), p. 499-527
Journal article
2010

Modelling of distortion during casting and machining

Johan Ahlström, Ragnar Larsson
Conference proceedings ICTPMCS-2010, 31 May – 2 June 2010, Shanghai, China, p. 8 pp-
Paper in proceedings
2009

Two phase continuum modelling of composites consolidation

Maciej Wysocki, L. E. Asp, Staffan Toll et al
Plastics, Rubber and Composites. Vol. 38 (2-4), p. 93-97
Journal article
2009

A higher-order stress-resultant shell formulation based on multiscale homogenization

Ragnar Larsson, Mats L Landervik
Paper in proceedings
2009

A micropolar theory for the finite elasticity of open-cell cellular solids

Per Hård af Segerstad, Staffan Toll, Ragnar Larsson
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences. Vol. 465 (2103), p. 843-865
Paper in proceedings
2009

Semi-Continuum Modeling of a Graphene Lattice Based on Tersoff-Brenner Atomistic Potential

Kaveh Samadikhah, Ragnar Larsson
Paper in proceedings
2009

Meso-level material modelling of compacted graphite iron and maching process simulation

Goran Ljustina, Ragnar Larsson
Paper in proceedings
2009

Aspects of viscoplasticty on manufacturing induced out-of-roundness in engine cylinder liners

Johan Ahlström, Ragnar Larsson, Magnus Ekh
Paper in proceedings
2009

A cohesive zone formulation for shell structures based on XFEM

Ragnar Larsson, Jesus Mediavilla, Martin Fagerström
Paper in proceedings
2009

Computational modelling of dissipative open-cell cellular solids at finite deformations

Per Hård af Segerstad, Staffan Toll, Ragnar Larsson
International Journal of Plasticity. Vol. 25 (5), p. 802-821
Journal article
2009

Modelling the consolidation of partially impregnated prepregs

Maciej Wysocki, Ragnar Larsson, Staffan Toll
Paper in proceedings
2009

Homogenization of Delamination Growth in an ACA Flip-chip Joint Based on Micropolar Theory

Yan Zhang, Ragnar Larsson
European Journal of Mechanics, A/Solids. Vol. 28, p. 433-444
Journal article
2008

Modeling of large inelastic deformations of foams with respect to the point of compaction

Mats L Landervik, Ragnar Larsson
European Journal of Mechanics - A/Solids. Vol. 27 (2), p. 234-246
Journal article
2008

Approaches to dynamic fracture modeling at finite deformations

Martin Fagerström, Ragnar Larsson
IUTAM Symposium - Progress in the Theory and Numerics of Configurational Mechanics (book of abstracts), p. 69-
Paper in proceedings
2008

Hyperelastic Constitutive Models for Consolidation of Commingled Yarn Based Composites

Maciej Wysocki, Staffan Toll, Ragnar Larsson et al
Paper in proceedings
2008

Homogenization and Shell Theory for Modeling Thin Porous Layers

Mats L Landervik, Ragnar Larsson
21st Nordic Seminar on Compuational Mechanics (T. Kvamsdal, K.M. Mathisen and B. Pettersen Eds.), p. 147-148
Paper in proceedings
2008

Multi-Scale Homogenization of Thin Foam Layers using Shell Theory

Ragnar Larsson, Mats L Landervik
Paper in proceedings
2008

Approaches to dynamic fracture modelling at finite deformations

Martin Fagerström, Ragnar Larsson
Journal of the Mechanics and Physics of Solids. Vol. 56 (613-639)
Journal article
2008

A constitutive equation for open-cell cellular solids, including viscoplasticity, damage and deformation induced anisotropy

Per Hård af Segerstad, Ragnar Larsson, Staffan Toll
International Journal of Plasticity. Vol. 24 (5), p. 896-914
Journal article
2008

Multi-Scale Homogenization of Thin Foam Layers Represented by Shell Elements

Mats L Landervik, Ragnar Larsson
International Conference Impact Loading of Lightweight Structures. Trondheim, Norway. June 17-19, 2008. (Edited by A.H. Clausen and M. Langseth), p. 35-36
Paper in proceedings
2008

A thermo-mechanical cohesive zone formulation for ductile fracture

Martin Fagerström, Ragnar Larsson
Journal of the Mechanics and Physics of Solids. Vol. 56 (10), p. 3037-3058
Journal article
2008

Experimental Investigation and Micropolar Modelling of the Anisotropic Conductive Adhesive Flip-Chip Interconnection

Yan Zhang, Johan Liu, Ragnar Larsson et al
Journal of Adhesion Science and Technology. Vol. 22 (14), p. 1717-1731
Journal article
2008

Micropolar Cohesive Zone Model for Delamination Failure in Microsystem Interconnects

Yan Zhang, Ragnar Larsson, Jing-yu Fan et al
Paper in proceedings
2008

TWO-PHASE CONTINUUM MODELLING OF COMPOSITES CONSOLIDATION

Maciej Wysocki, Leif Asp, Staffan Toll et al
Paper in proceedings
2008

Atomistic Continuum Modeling of Mono Layer Graphene Membranes

Ragnar Larsson, Kaveh Samadikhah
21st Nordic Seminar on Compuational Mechanics (T. Kvamsdal, K.M. Mathisen and B. Pettersen Eds.), p. 108-111
Paper in proceedings
2008

Understanding BGA interconnect interface behaviour using Micropolar theory

Yan Zhang, Ragnar Larsson, Johan Liu
Journal article
2008

Experimental and Modeling of the Stress-Strain Behavior of a BGA Interconnect Due to Thermal Load

Yan Zhang, Johan Liu, Ragnar Larsson
Journal of Electronic Packaging, Transactions of the ASME. Vol. 130 (2), p. 0210101-0210107
Journal article
2007

Multi-scale homogenization of thin foam layers

Mats L Landervik, Ragnar Larsson
Conference contribution
2007

An approach to model dissipative open-cell cellular solids at finite deformation

Per Hård af Segerstad, Ragnar Larsson, Staffan Toll
Conference contribution
2007

Thermo-mechanical Modeling of Ductile Crack Propagation with Application to High Velocity Cutting

Martin Fagerström, Ragnar Larsson
9th US National Congress on Computational Mechanics, CD (1p abstract)
Paper in proceedings
2007

A second-order homogenization procedure for multi-scale analysis based on micropolar kinematics

Ragnar Larsson, Diebels Stefan
International Journal for Numerical Methods in Engineering. Vol. 69, p. 2485-2512
Journal article
2007

Pore-gas interaction in foams at finite deformation using staggered solution techniques

Mats L Landervik, Ragnar Larsson
Conference contribution
2007

Approaches to dynamic fracture modelling at finite deformations

Ragnar Larsson, Martin Fagerström
Paper in proceedings
2007

On the modelling of open-cell cellular solids subjected to high compressive deformations

Per Hård af Segerstad, Ragnar Larsson, Staffan Toll
Conference contribution
2007

Constitutive models for consolidation of commingled yarn based composites

Maciej Wysocki, Ragnar Larsson, Staffan Toll
Conference contribution
2007

PBGA Interconnect Behavior under Thermal Effects

Yan Zhang, Johan Liu, Ragnar Larsson
Proceedings of International Conference on Electronics Packaging (ICEP2007), Tokyo, Japan, p. 329-334
Paper in proceedings
2007

Micropolar Delamination Modelling for ACF Flip-chip Joints in Microsystem

Yan Zhang, Ragnar Larsson
Conference contribution
2007

Pore–gas interaction in foams at finite deformation using staggered solution techniques

Mats L Landervik, Ragnar Larsson
Computer Methods in Applied Mechanics and Engineering. Vol. 197, p. 148-159
Journal article
2007

Second order multi-scale micropolar model for microsystem interconnections

Yan Zhang, Johan Liu, Jing-yu Fan et al
Proceedings of the Fifth International Conference on Nonlinear Mechanics (ICNM-V), p. 1434-1439
Paper in proceedings
2007

Interface modelling microsystem interconnections using micropolar theory and discontinuous approximation

Yan Zhang, Ragnar Larsson, Jing-yu Fan et al
Computers & Structures. Vol. 85 (19-20), p. 1500-1513
Journal article
2007

Homogenization of microsystem interconnects based on micropolar theory and discontinuous kinematics

Ragnar Larsson, Yan Zhang
Journal of the Mechanics and Physics of Solids. Vol. 55, p. 819-841
Journal article
2007

Press forming of commingled yarn based composites: The preform contribution

Maciej Wysocki, Staffan Toll, Ragnar Larsson
Composites Science and Technology. Vol. 67 (3-4), p. 515-524
Journal article
2006

Homogenization Model Based on Micropolar Theory for the Interconnection Layer in Microsystem Packaging

Yan Zhang, Ragnar Larsson, Jing-yu Fan et al
Proceedings of the eight IEEE CPMT International Symposium on High Density Packaging and Component Failure Anlaysis (HDP´06), p. 166-170
Paper in proceedings
2006

Finite Deformation Fracture Modelling of a Thermo-Mechanical Cohesive Zone

Ragnar Larsson, Martin Fagerström
Paper in proceedings
2006

Theory and numerics for finite deformation fracture modelling using strong discontinuities

Martin Fagerström, Ragnar Larsson
International Journal for Numerical Methods in Engineering. Vol. 66 (6), p. 911-948
Journal article
2006

Higher Order Homogenization of a Microsystem Interface Based on Micropolar Theory

Ragnar Larsson, Yan Zhang
Paper in proceedings
2006

Study on the Multi-Scale Properties of the Internal Structure in ACA Interconnection

Yan Zhang, Ragnar Larsson, Jing-yu Fan et al
Proc. 1 st Electronics Systemintegration Technology Conference, 2006 (ESTC 2006), 5 - 7 Sept. 2006, Dresden, Germany. Vol. 2, p. 757-761
Paper in proceedings
2006

Micromechanical model of a dissipative open-cell cellular solid

Per Hård af Segerstad, Ragnar Larsson, Staffan Toll
Conference contribution
2006

Pore-gas interaction in polymeric foam with respect to energy absorption

Mats L Landervik, Ragnar Larsson
Paper in proceedings
2006

Micro-mechanical model of a viscoplastic open-cell foam

Per Hård af Segerstad, Ragnar Larsson, Staffan Toll
Paper in proceedings
2006

Interface Modelling of ACA Interconnects Using Micropolar Theory

Yan Zhang, Ragnar Larsson, Johan Liu
2005 Conference on High Density Microsystem Design and Packaging and Component Failure Analysis, HDP'05; Shanghai; China; 27 June 2005 through 29 June 2005, p. Art. no. 4017426-
Paper in proceedings
2005

Process rheology of fibre composites

Staffan Toll, Ragnar Larsson, Maciej Wysocki et al
Conference contribution
2005

A framework for fracture modelling based on the material forces concept with XFEM kinematics

Ragnar Larsson, Martin Fagerström
Int. J. Numer. Meth. Engng.. Vol. 62, p. 1763-1788
Journal article
2005

Microsystem Interconnections Modelling Using Micropolar Theory and Discontinuous Approximation

Yan Zhang, Ragnar Larsson, Jingyu Fan et al
Proceedings of 5th International Conference on Polymers and Adhesives in Microelectronics and Photonics (Polytronic 2005), p. 176-179
Paper in proceedings
2005

Interface Modelling of an ACA Interconnect Using Micropolar Theory and Discontinuous Approximation

Yan Zhang, Ragnar Larsson, Jing-yu Fan et al
Paper in proceedings
2005

Modeling of large inelastic deformations of foam with respect to energy absorption

Ragnar Larsson, Mats L Landervik
Poromechanics III, Biot Centennial Conference, Oclahoma City, May 24-27, 2005, p. 95-100
Paper in proceedings
2005

A second order homogenization procedure for multi-scale analysis based on nonlinear micro-polar kinematics

Ragnar Larsson, Tobias Ebinger, Stefan Diebels
Computational Plasticity VIII - Fundamentals and applications, D.R.J. Owen, E. Onate, and B. Suarez, CIMNE, Barcelona, p. 1166-1169
Paper in proceedings
2005

Inverse discontinuity formulation of fracture

Ragnar Larsson, Martin Fagerström
J. Struct. Mech. - Rakenteiden Mekaniikka. Vol. 38 (3), p. 27-30
Magazine article
2005

Hydrostatic consolidation of fibre composites

Maciej Wysocki, Ragnar Larsson, Staffan Toll
Composites Science and Technology. Vol. 65, p. 1507-1519
Journal article
2005

Interface Modelling of an ACA Interconnect Using Micropolar Theory and Discontinuous Approximation

Yan Zhang, Ragnar Larsson, Jingyu Fan et al
Proceedings of the 7th International IEEE CPMT Conference on High Density Microsystem Design, Packaging and Failure Analysis (HDP05), p. pp115-119
Paper in proceedings
2005

Finite deformation fracture modelling using direct/inverse strong discontinuities

Martin Fagerström, Ragnar Larsson
Computational Plasticity VIII - Fundamentals and applications, D.R.J. Owen, E. Onate, and B. Suarez, CIMNE, Barcelona, p. 450-453
Paper in proceedings
2005

Micro-mechanical model of a viscoplastic open-cell foam

Per Hård af Segerstad, Ragnar Larsson, Staffan Toll
Computational Plasticity VIII - Fundamentals and applications, D.R.J. Owen, E. Onate, and B. Suarez, CIMNE, Barcelona, p. 755-758
Paper in proceedings
2005

Inverse Discontinuity Formulation of Fracture

Martin Fagerström, Ragnar Larsson
Conference contribution
2005

Micromechanical model of a viscoplastic open-cell foam

Per Hård af Segerstad, Ragnar Larsson, Staffan Toll
Conference contribution
2005

An interface cohesive zone model based on an inverse strong discontinuity formulation

Ragnar Larsson, Martin Fagerström
Mechanics of Material Forces; (Advances in Mechanics and Mathematics, Vol. 11) ; Steinmann, Paul; Maugin, Gérard A. (Eds.), p. Chapter 27-
Chapter in monograph, book - peer reviewed
2005

Finite element model for axisymmetric consolidation of thermoplastic composite materials

Maciej Wysocki, Leif Asp, Staffan Toll et al
Paper in proceedings
2005

Modeling of large inelastic deformations of a structural foam at high deformation rates

Mats L Landervik, Ragnar Larsson
", Computational Plasticity VIII - Fundamentals and applications, D.R.J. Owen, E. Onate, and B. Suarez, CIMNE, Barcelona, p. 119-122
Paper in proceedings
2004

A Discontinuous Shell-Interface Element for Delamination Analysis of Laminated Composite Structures

Ragnar Larsson
Comp. Meth. Appl. Mech. Engng. Vol. 193, p. 3173-3194
Journal article
2004

Process modeling of composites using two-phase porous media theory

Ragnar Larsson, Staffan Toll, Maciej Wysocki
Eur. J. Mech. A/Solids. Vol. 23, p. 15-36
Journal article
2003

Sprickmodellering enligt konceptet med materiella krafter

Martin Fagerström, Ragnar Larsson
Svenska Mekanikdagar, Göteborg, 2003, p. 1p abstract-
Conference contribution
2003

Modelling press forming of fibre composites using two-phase continuum theory

Maciej Wysocki, Ragnar Larsson, Staffan Toll
Journal article
2003

Rotational Interface Formulation for Delamination Analysis of Composite Laminates

Niklas Jansson, Ragnar Larsson
Computers and Structures. Vol. 81, p. 2705-2716
Journal article
2002

A framework for the modeling of press forming of fiber composites using two-phase porous media theory

Ragnar Larsson, Staffan Toll
Poromechanics II, Second Biot Conf. Poromechanics, Grenoble, France, August 26-28, 2002, p. 237-243
Paper in proceedings
2002

A Discontinuous Shell Element for Delamination Analysis of Laminated Composite Structures

Ragnar Larsson, Niklar Jansson
Conference contribution
2002

Geometrically Non-linear Damage Interface Based on Regularized Strong Discontinuity

Ragnar Larsson, Niklas Jansson
International Journal for Numerical Methods in Engineering. Vol. 54, p. 473-497
Journal article
2002

Wysocki, Maciej

Maciej Wysocki, Ragnar Larsson, Staffan Toll
Paper in proceedings
2002

Non-Linear Analysis of Nearly Saturated Porous Media: Theoretical and Numerical Formulation

Jonas Larsson, Ragnar Larsson
Comp. Meth. Appl. Mech. Engng.. Vol. 191, p. 3885-3907
Journal article
2002

Theory and numerics of localization in a fluid-saturated elastoplastic porous medium

Ragnar Larsson, Jonas Larsson, Kenneth Runesson
Porous Media: Theory, Experiments and Numerical Applications , Springer multi-author volume / edited by W. Ehlers, J. Bluhm, p. 315-340
Chapter in monograph, book - peer reviewed
2002

Modelling of composites forming processes using multi-phase continuum theory

Maciej Wysocki, Ragnar Larsson, Staffan Toll
Proceedings of the ninth International Conference on Fibre Reinforced Composites, Newcastle, September 13-15, 2002, p. 345-353
Paper in proceedings
2001

A Damage Model for Simulation of Mixed Mode Delamination Growth

Niklas Jansson, Ragnar Larsson
Composite Structures. Vol. 53, p. 409-417
Journal article
2001

A Geometrically Non-linear Interface Debonding Model

Ragnar Larsson, Niklas Jansson
Paper in proceedings
2000

Localization Analysis of a Fluid Saturated Elastoplastic Porous Medium Using Regularized Discontinuities

Jonas Larsson, Ragnar Larsson
Mechanics of Cohesive-Frictional Materials. Vol. 5 (7), p. 565-582
Journal article
2000

Finite element modelling of delamination progression under mixed mode loadings

Niklas Jansson, Ragnar Larsson, Staffan Toll
Paper in proceedings
2000

Finite Element Analysis of Localization of Deformation and Fluid Pressure in an Elastoplastic Porous Medium

Jonas Larsson, Ragnar Larsson
Int. J. Solids Structures. Vol. 37, p. 7231-7257
Journal article
1999

Computational Strategy for Capturing Localization in Undrained Soil

Jonas Larsson, Ragnar Larsson
Computational Mechanics. Vol. 24, p. 293-303
Journal article
1999

On Localization in Thermo-Elastoplastic Solids Subjected to Adiabatic Conditions

Kenneth Runesson, Paul Steinmann, Ragnar Larsson
Eur. J. Mech. A/Solids. Vol. 18, p. 557-579
Journal article
1998

Localization in Hyperelasto-Plastic Porous Solids Subjected to Undrained Conditions

Kenneth Runesson, Ragnar Larsson, Stein Sture
Int. J. Solids Structures. Vol. 35 (31-32), p. 4239-4255
Journal article
1998

Finite element embedded localization band for finite strain plasticity based on regularized strong discontinuity

Ragnar Larsson, Paul Steinmann, Kenneth Runesson
Mechanics of Cohesive-Frictional Materials. Vol. 4 (2), p. 171-194
Journal article
1997

On the localization properties of multiplicative hyperelasto-plastic continua with strong discontinuities

Paul Steinmann, Ragnar Larsson, Kenneth Runesson
Int. J. Solids Structures. Vol. 34 (8), p. 969-990
Journal article
1996

Implicit integration and consistent linearization for yield criteria of the Mohr-Coulomb type

Ragnar Larsson, Kenneth Runesson
Mechanics of Cohesive-Frictional Materials. Vol. 1, p. 367-383
Journal article
1996

Embedded localization band in undrained soil based on regularized strong discontinuity theory and FE-analysis

Ragnar Larsson, Kenneth Runesson, Stein Sture
International J. Solids and Structures. Vol. 33 (20-22), p. pp. 3081-3101
Journal article
1996

Element-embedded localization band based and regularized displacement discontinuity

Ragnar Larsson, Kenneth Runesson
Journal of Engineering Mechanics. Vol. 122 (5), p. pp. 402-411
Journal article
1996

Localization properties of a frictional material model based on discontinuous approximation

Ragnar Larsson, Kenneth Runesson, Kenneth Axelsson
Int. J. Num. Anal. Meth. Geomech.. Vol. 20, p. 771-783
Journal article
1996

Embedded localization band in undrained soil based on regularized strong discontinuity - Theory and FE-analysis

Ragnar Larsson, Kenneth Runesson, Stein Sture
Int. J. Solids Structures. Vol. 33 (20-22), p. 3081-3101
Journal article
1996

Element-Embedded Localization Band based on Regularized Strong Discontinuity

Ragnar Larsson, Kenneth Runesson
Journal of Engineering Mechanics, ASCE. Vol. 122 (5), p. 402-411
Journal article
1995

Cohesive Crack Models for Brittle Materials derived from Localization of Damage Coupled to Plasticity

Ragnar Larsson, Kenneth Runesson
International Journal of Fracture. Vol. 69, p. 101-122
Journal article
1995

A Generalized Fictitious Crack Model based on Plastic Localization and Discontinuous Approximation

Ragnar Larsson
International Journal for Numerical Methods in Engineering. Vol. 38, p. 3167-3188
Journal article
1995

Cohesive crack models for brittle materials derived from localization of damage coupled to plasticity

Ragnar Larsson, Kenneth Runesson
International Journal of Fracture. Vol. 64, p. pp. 101-122
Journal article
1995

A generalized fictitious crack model based on plastic localization and discontinuous approximation

Ragnar Larsson
International Journal for Numerical Methods in Engineering. Vol. 38, p. pp. 3167-3188
Journal article
1993

Properties of Incremental Solutions for Dissipative Material

Kenneth Runesson, Ragnar Larsson
Journal of Engineering Mechanics, ASCE. Vol. 119, p. pp. 647-666
Journal article
1993

Properties of Incremental Solutions for Dissipative Material

Kenneth Runesson, Ragnar Larsson
Journal of Engineering Mechanics, ASCE. Vol. 119, p. 647-666
Journal article
1993

Discontinuous Displacement Approximation for Capturing Plastic Localization

Ragnar Larsson, Kenneth Runesson, Niels-Saabye Ottosen
International Journal for Numerical Methods in Engineering. Vol. 36, p. 2087-2105
Journal article
1993

Formulation and Implementation of Conditions for Frictional Contact

Kenneth Runesson, Marek Klisinski, Ragnar Larsson
Engineering Computations. Vol. 10, p. 3-14
Journal article
1993

Formulation and Implementation of Conditions for Frictional Contact

Kenneth Runesson, Marek Klisinski, Ragnar Larsson
Engineering Computations. Vol. 10, p. pp. 3-14
Journal article
1993

Discontinuous Displacement Approximation for Capturing Plastic Localization

Ragnar Larsson, Kenneth Runesson, Niels Saabye Ottosen
International Journal for Numerical Methods in Engineering. Vol. 36, p. pp. 2087-2105
Journal article
1991

Finite Element Simulation of Localized Plastic Deformation

Ragnar Larsson, Kenneth Runesson, Stein Sture
Ingenieur-Archive, p. pp. 37-
Journal article
1991

Numerical Simulation of Plastic Localization using FE-mesh Realignment

Ragnar Larsson, Kenneth Runesson, Alf Samuelsson
Progress in Computational Analysis of Inelastic Structures, p. 34 pp.-
Journal article
1991

Finite Element Simulation of Localized Plastic Deformation

Ragnar Larsson, Kenneth Runesson, Stein Sture
Archive of Applied Mechanics. Vol. 61, p. 305-317
Journal article
1990

Characteristics and Computational Procedure in Softening Plasticity

Kenneth Runesson, Ragnar Larsson, Stein Sture
Journal of Engineering Mechanics. Vol. 112 (8), p. pp. 1628-1646
Journal article
1990

Numerical simulation of plastic localization

Ragnar Larsson
Doctoral thesis
1989

Characteristics and computational procedure in softening plasticity

Kenneth Runesson, Ragnar Larsson, Stein Sture
ASCE, Journal of Engineering Mechanics. Vol. 115 (8), p. pp. 1628-1646
Journal article
1989

Mesh generation and mesh refinement procedures for computational plasticity

Hao Jin, Lars Bernspång, Ragnar Larsson et al
Second international conference on computational plasticity-models, software and applications, COMPLAS II, Barcelona, Spain, 18th-22nd September 1989, p. 11-
Paper in proceedings
1988

Stability of elastic plane frames including soil-structure interaction

Ragnar Larsson, Nils-Erik Wiberg
Computers and Structures. Vol. 29 (5), p. 845-858
Journal article
1988

Stability of elastic plane frames including soil-structure interaction

Ragnar Larsson, Nils-Erik Wiberg
Computers and Structures. Vol. 29 (5), p. pp. 845-858
Journal article
1987

On exact and hierarchical finite elements for frame structures

Ragnar Larsson, Nils-Erik Wiberg
The International Conference on Numerical Methods in Engineering (NUMETA 87), Swansea, July 6-10, 1987, p. 9-
Paper in proceedings
1987

On exact and hierarchical finite elements for frame structures

Ragnar Larsson, Nils-Erik Wiberg
Report
1987

Stability of plane frames including soil structure interaction

Ragnar Larsson, Nils-Erik Wiberg
Report
1987

Stability of Elastic Plane Frame Including Soil-structure Interaction

Ragnar Larsson, Nils-Erik Wiberg
Computers & Structures. Vol. 29, p. 845-855
Journal article
1987

Characteristics and computational procedure in softening plasticity

Kenneth Runesson, Ragnar Larsson
Report
1987

SITU-FRAME-E2-V1 - A Computer Program for second order analysis of plane frames with static loads

Ragnar Larsson, Nils-Erik Wiberg, Kenneth Runesson et al
Report
1987

Elastic-plastic pile-frame interaction

Ragnar Larsson, Nils-Erik Wiberg
The 6:th International Conference on Numerical Methods in Geomechanics (ICONMIG 88), Innsbruck, April 11-15, 1988, p. 8-
Paper in proceedings
1985

Utredning om mini- och mikrodatorer vid CTH

Ragnar Larsson, Odd Tullberg
Report
1984

On the behaviour of natural slopes with emphasis on progressive failure

Peter F G Hansbo, Ragnar Larsson, Kenneth Runesson et al
The 11th International Conference on Soil Mechanics and Foundation Engineering, San Fransisco 1985, p. 4-
Paper in proceedings
1984

SITU - STRESS - E - V1.

Kenneth Runesson, Harald Tägnfors, Nils-Erik Wiberg et al
Report