A CONTINUUM DAMAGE MODEL FOR BOLTED JOINT FAILURE PREDICTION IN FIBER-REINFORCED COMPOSITES
Konferensbidrag (offentliggjort, men ej förlagsutgivet), 2018

The present study presents a three-dimensional Continuum Damage Model (CDM) applied to failure prediction of composite bolted joints, implemented into Abaqus™/Explicit Finite Element (FE) code using a VUMAT user-subroutine. The damage model is developed on an energy-based context, enabling the prediction of failure initiation and propagation at the intralaminar level. The model is capable of predicting longitudinal, transverse and in-plane shear failure modes. Mesh independence is achieved through a damage evolution rule that accounts for the damage progression speed. Interlaminar failure mechanisms are also implemented in the model utilizing Cohesive Elements (CEs), natively available in Abaqus™. The prediction of variable mixed-mode failures is possible without the need of prior knowledge concerning the mixity ratio between delamination modes. This is achieved through the application of a single-damage variable for all delamination modes. Numerical predictions of the load-displacement behavior, as well as damage propagation and failure of single-lap bolted joints are presented and assessed through a correlative study with experimental and numerical results available in literature.

Fiber-Reinforce Composites

Explicit Finite Element Analysis

Continuum Damage Mechanics

Bolted Joints.

Författare

Alfredo de Faria

Instituto Tecnológico de Aeronáutica (ITA)

Jerônimo Faria

Instituto Tecnológico de Aeronáutica (ITA)

Sérgio de Oliveira

Instituto Tecnológico de Aeronáutica (ITA)

Maurício Donadon

Instituto Tecnológico de Aeronáutica (ITA)

Ragnar Larsson

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

4thBrazilian Conference on Composite Materials
Rio de Janeiro, Brazil,

Drivkrafter

Hållbar utveckling

Ämneskategorier

Teknisk mekanik

Strömningsmekanik och akustik

Kompositmaterial och -teknik

Styrkeområden

Produktion

Materialvetenskap

Fundament

Grundläggande vetenskaper

Mer information

Skapat

2018-09-03