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Simulation of Energy Absorption in Braided Composite Tubes through Axial Crushing

Contributors: Carla McGregor, Reza Vaziri - The University of British Columbia, Canada, Xinran Xiao - General Motors Corporation

Modeling damage propagation and energy absorption in composite tubular structures under axial compression is a challenging task due to the complex nature of damage growth in composites. In this paper, our model (CODAM for COmposite DAMage), which is incorporated into LS-DYNA® as a user material model, is used to simulate the axial crushing response of braided composite tubes. Recent improvements to the finite element model include the addition of a debris wedge, representation of delamination using a tiebreak contact interface, and more physically based model parameters. It is shown that the damage propagation, fracture morphology and energy absorption predictions correlate well with the experimental results.

MaterialModeling-5.pdf — PDF document, 657Kb