Ragnar Larsson
Ragnar Larsson är professor och avdelningschef för avdelningen material och beräkningsmekanik.
Tyngdpunkten i forskningen ligger inom kontinuums- och materialmekaniken med inriktning mot modellering/simulering av "lokaliserad deformation" som t ex sprickutveckling, med numerisk mekanik (Computational Material and Failure Mechanics). Ragnar jobbar även mycket med porösa materials modellering kopplat till interaktion med fluid- eller gasfaser. Tillämpningarna ligger inom fordonssäkerhet (crashworthiness), skärande bearbetning och processimulering av kompositmaterial.
Visar 221 publikationer
Rate dependent compressive failure and delamination growth in multidirectional composite laminates
Towards an accurate estimation of heat flux distribution in metal cutting by machine learning
Compressive failure and kink-band formation modeling
A micromechanics based model for rate dependent compression loaded unidirectional composites
An ML-based approach for inverse identification of heat flux in machining
A micromechanically based model for dynamic damage evolution in unidirectional composites
Gradient-enhanced damage growth modelling of ductile fracture
Application of a Rate Dependent Model on a UD NCF Carbon/Epoxy Composite
Validation of the ductile fracture modeling of CGI at quasi-static loading conditions
A micromechanically based model for strain rate effects in unidirectional composites
FE modeling and simulation of machining Alloy 718 based on ductile continuum damage
Modeling of the vacuum assisted resin transfer molding process
A gradient enhanced damage growth model for ductile fracture
A Mechanics Based Surface Image Interpretation Method for Multifunctional Nanocomposites
Failure prediction in fiber-reinforced composites based on continuum damage mechanics
Modeling and Experimental Validation of the VARTM Process for Thin-Walled Preforms
Modeling and experimental validation of the vartm process
A ductile fracture model based on continuum thermodynamics and damage
Carbon-fibre composites with graphene filler for enhanced properties
Homogenized free surface flow in porous media for wet-out processing
Planar Infusion Flow Modelling of Thin-Walled Components with Deformable Perform
Homogenization Method for 2-D Nano-Structure Reinforced Polymer Matrix
A Continuum Damage Model For Bolted Joint Failure Prediction In Fiber-Reinforced Composites
Homogenization Method for 2-D Nanostructure Reinforced Epoxy
A viscous regularized damage growth model for ductile fracture
Damage growth and strain localization in compressive loaded fiber reinforced composites
A MODEL FOR PREDICTING FREE SURFACE FLOW OF THE RTM PROCESS
Proceedings of 29th Nordic Seminar on Computational Mechanics – NSCM29
Holistic modeling of composites manufacturing using poromechanics
Mesh objective continuum damage models for ductile fracture
Modelling of kink-band growth based on the geometrically non-linear theory
Mesh objective damage modeling of ductile fracture at visco-plastic continuum response
Damage growth in compressive loadded fibre reinforced composites
Experimental assessment of coupled dual-scale flow-deformation processes in composites manufacturing
Mesh objective models for ductile fracture based on a damage phase field concept
PREDICTION OF THROUGH-THICKNESS STRESS DISTRIBUTION IN LAMINATED SHELL STRUCTURES
A fully coupled multiscale shell formulation for the modelling of fibre reinforced laminates
On the subscale enrichment of crack tip element in XFEM and the phantom node method
Proceedings of 14th European Mechanics of Materials Conference - EMMC14
Fracture modeling of composite laminates based on phase field damage evolution in shell kinematics
A FE based machining simulation methodology accounting for cast iron microstructure
Rate Sensitive Continuum Damage Models and Mesh Dependence in Finite Element Analyses
Ductile fracture modeling based on a mesh objective element removal technology
Process modeling of composite materials - a holistic and generic simulation tool using poromechanics
Poromechanical modelling the pre- and post-filling flows in composite manufacturing
Modeling dual-scale flow-deformation processes in composites manufacturing
FE modeling and numerical implemtation of flow-deformation processes in composites manufacturing
Subscale enrichment of discontinuity for XFEM crack tip element
MODELLING DUAL-SCALE FLOW-DEFORMATION PROCESSES IN COMPOSITES MANUFACTURING
Modeling of coupled dual-scale flow–deformation processes in composites manufacturing
Rate Sensitive Continuum Damage Models and Mesh Dependence in Finite Element Analyses
Rate Sensitive Continuum Damage Models and Mesh Dependence in Finite Element Analyses
Hypo– and hyperinelasticity applied to modeling of compacted graphite iron machining simulations
Dynamic crack propagation in elastoplastic thin-walled structures: Modelling and validation
A stress-resultant shell theory based on multiscale homogenization
MODELING THE CONSTITUTIVE RESPONSE OF AN ANISOTROPIC DUAL-SCALE FLOW
Continuum-molecular modelling of Graphene
Composite manufacturing modeling using porous media theory
Ductile dynamic fracture modeling using embedded discontinuities in CGI machining simulations
Ductile dynamic fracture modeling using embedded strong discontinuities in CGI machining simulations
Dynamic ductile fracture in shells
Free surface flow and preform deformation in composites manufacturing based on porous media theory
CONSTITUTIVE MODELLING OF ANISOTROPIC TWO-SCALE FLOW
Ductile dynamic fracture modeling using embedded strong discontinuities in CGI machining simulations
Dynamic Ductile Fracture in Thin-walled Structures based on XFEM
Hypo-- and hyperinelasticity applied to modeling of compacted graphite iron machining simulations
Modeling resin flow, preform deformations and residual stresses in RTM manufacturing
Atomistic continuum modeling of graphene membranes
Experiments and modelling of the cyclic behaviour of Haynes 282
Constitutive Modeling of CGI Machining Simulations
A cohesive zone formulation of fracturing shells based on XFEM
Infusion modelling using two-phase porous media theory
Constitutive modeling and validation of CGI machining
Continuum - Molecular Modeling of Graphene Lattice
Modelling multiple scales in composites manufacturing
Dynamic fracture modeling in shell structures based on XFEM
Modelling of distortion during casting and machining
Anisotropic and tension-compression asymmetric model for composites consolidation
Modelling the consolidation of partially impregnated prepregs
A higher-order stress-resultant shell formulation based on multiscale homogenization
Homogenization of Delamination Growth in an ACA Flip-chip Joint Based on Micropolar Theory
Aspects of viscoplasticty on manufacturing induced out-of-roundness in engine cylinder liners
A cohesive zone formulation for shell structures based on XFEM
Computational modelling of dissipative open-cell cellular solids at finite deformations
A micropolar theory for the finite elasticity of open-cell cellular solids
Meso-level material modelling of compacted graphite iron and maching process simulation
Semi-Continuum Modeling of a Graphene Lattice Based on Tersoff-Brenner Atomistic Potential
Two phase continuum modelling of composites consolidation
Understanding BGA interconnect interface behaviour using Micropolar theory
A thermo-mechanical cohesive zone formulation for ductile fracture
Atomistic Continuum Modeling of Mono Layer Graphene Membranes
Homogenization and Shell Theory for Modeling Thin Porous Layers
TWO-PHASE CONTINUUM MODELLING OF COMPOSITES CONSOLIDATION
Multi-Scale Homogenization of Thin Foam Layers using Shell Theory
Approaches to dynamic fracture modelling at finite deformations
Micropolar Cohesive Zone Model for Delamination Failure in Microsystem Interconnects
Experimental and Modeling of the Stress-Strain Behavior of a BGA Interconnect Due to Thermal Load
Multi-Scale Homogenization of Thin Foam Layers Represented by Shell Elements
Hyperelastic Constitutive Models for Consolidation of Commingled Yarn Based Composites
Modeling of large inelastic deformations of foams with respect to the point of compaction
Approaches to dynamic fracture modeling at finite deformations
Second order multi-scale micropolar model for microsystem interconnections
Pore–gas interaction in foams at finite deformation using staggered solution techniques
PBGA Interconnect Behavior under Thermal Effects
Micropolar Delamination Modelling for ACF Flip-chip Joints in Microsystem
Approaches to dynamic fracture modelling at finite deformations
Press forming of commingled yarn based composites: The preform contribution
Homogenization of microsystem interconnects based on micropolar theory and discontinuous kinematics
Constitutive models for consolidation of commingled yarn based composites
Pore-gas interaction in foams at finite deformation using staggered solution techniques
An approach to model dissipative open-cell cellular solids at finite deformation
Multi-scale homogenization of thin foam layers
On the modelling of open-cell cellular solids subjected to high compressive deformations
A second-order homogenization procedure for multi-scale analysis based on micropolar kinematics
Thermo-mechanical Modeling of Ductile Crack Propagation with Application to High Velocity Cutting
Micromechanical model of a dissipative open-cell cellular solid
Pore-gas interaction in polymeric foam with respect to energy absorption
Study on the Multi-Scale Properties of the Internal Structure in ACA Interconnection
Finite Deformation Fracture Modelling of a Thermo-Mechanical Cohesive Zone
Interface Modelling of ACA Interconnects Using Micropolar Theory
Theory and numerics for finite deformation fracture modelling using strong discontinuities
Higher Order Homogenization of a Microsystem Interface Based on Micropolar Theory
Micro-mechanical model of a viscoplastic open-cell foam
A framework for fracture modelling based on the material forces concept with XFEM kinematics
Modeling of large inelastic deformations of a structural foam at high deformation rates
An interface cohesive zone model based on an inverse strong discontinuity formulation
Micro-mechanical model of a viscoplastic open-cell foam
Inverse Discontinuity Formulation of Fracture
Inverse discontinuity formulation of fracture
Finite element model for axisymmetric consolidation of thermoplastic composite materials
Hydrostatic consolidation of fibre composites
Modeling of large inelastic deformations of foam with respect to energy absorption
Interface Modelling of an ACA Interconnect Using Micropolar Theory and Discontinuous Approximation
Micromechanical model of a viscoplastic open-cell foam
Process rheology of fibre composites
Microsystem Interconnections Modelling Using Micropolar Theory and Discontinuous Approximation
Finite deformation fracture modelling using direct/inverse strong discontinuities
Interface Modelling of an ACA Interconnect Using Micropolar Theory and Discontinuous Approximation
Process modeling of composites using two-phase porous media theory
A Discontinuous Shell-Interface Element for Delamination Analysis of Laminated Composite Structures
Rotational Interface Formulation for Delamination Analysis of Composite Laminates
Modelling press forming of fibre composites using two-phase continuum theory
Sprickmodellering enligt konceptet med materiella krafter
Theory and numerics of localization in a fluid-saturated elastoplastic porous medium
A Discontinuous Shell Element for Delamination Analysis of Laminated Composite Structures
Non-Linear Analysis of Nearly Saturated Porous Media: Theoretical and Numerical Formulation
Modelling of composites forming processes using multi-phase continuum theory
Geometrically Non-linear Damage Interface Based on Regularized Strong Discontinuity
A Geometrically Non-linear Interface Debonding Model
A Damage Model for Simulation of Mixed Mode Delamination Growth
Finite element modelling of delamination progression under mixed mode loadings
Computational Strategy for Capturing Localization in Undrained Soil
On Localization in Thermo-Elastoplastic Solids Subjected to Adiabatic Conditions
Localization in Hyperelasto-Plastic Porous Solids Subjected to Undrained Conditions
Localization properties of a frictional material model based on discontinuous approximation
Element-Embedded Localization Band based on Regularized Strong Discontinuity
Implicit integration and consistent linearization for yield criteria of the Mohr-Coulomb type
Element-embedded localization band based and regularized displacement discontinuity
A generalized fictitious crack model based on plastic localization and discontinuous approximation
A Generalized Fictitious Crack Model based on Plastic Localization and Discontinuous Approximation
Eighth Nordic Seminar on Computational Mechanics, Short Papers, Göteborg November 17-18, 1995
Discontinuous Displacement Approximation for Capturing Plastic Localization
Properties of Incremental Solutions for Dissipative Material
Discontinuous Displacement Approximation for Capturing Plastic Localization
Properties of Incremental Solutions for Dissipative Material
Formulation and Implementation of Conditions for Frictional Contact
Formulation and Implementation of Conditions for Frictional Contact
Numerical Simulation of Plastic Localization using FE-mesh Realignment
Finite Element Simulation of Localized Plastic Deformation
Finite Element Simulation of Localized Plastic Deformation
Characteristics and Computational Procedure in Softening Plasticity
Mesh generation and mesh refinement procedures for computational plasticity
Characteristics and computational procedure in softening plasticity
Stability of elastic plane frames including soil-structure interaction
Stability of elastic plane frames including soil-structure interaction
Stability of Elastic Plane Frame Including Soil-structure Interaction
On exact and hierarchical finite elements for frame structures
Characteristics and computational procedure in softening plasticity
On exact and hierarchical finite elements for frame structures
SITU-FRAME-E2-V1 - A Computer Program for second order analysis of plane frames with static loads
Elastic-plastic pile-frame interaction
Stability of plane frames including soil structure interaction
On the behaviour of natural slopes with emphasis on progressive failure
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Visar 12 forskningsprojekt
REaL-tIme characterization of ANisotropic Carbon-based tEchnological fibres, films and composites
Micromorphic multiscale modeling of the workpiece material flow during metal cutting
Grafenförstärkta, multifunktionella termoplaster för flygapplikationer
En simuleringsbaserad för guide för prediktion av skärbarhet
En simuleringsbaserad för guide för prediktion av skärbarhet
Multifunktionell kompositstruktur med hjälp av Grafen (MULTIGRAPH)
En skalteori baserad på tvåfas-kontinuum för processimulering av strukturella kompositer
Effektiv simuleringsdriven utvecklingsmetodik för bilstrukturer i kompositmaterial
Kompressionsbrott i komplexa NCF kompositstrukturer - KOMPRESS
Prediktering av termomekanisk utmattning av superlegeringskomponenter
Modellering av krockbeteendet i framtida lättviktsfordon
Snabba deformationsförlopp vid maskinbearbetning och containment