Personal tools
Home → 10th International LS-DYNA Conference → Simulation of Composite Tubes Axial Impact with a Damage Mechanics Based Composite Material Model

restrict search to current section
For a simple text search, enter your search term here. Multiple words may be found by combining them with AND and OR. The text in this field will be matched with items' contents, title and description.

 

Simulation of Composite Tubes Axial Impact with a Damage Mechanics Based Composite Material Model

Contributors: Xinran Xiao - General Motors Corporation

Composite tube axial impact is a benchmark problem measuring the predictive capability of composite crash simulation. A previous work revealed that MAT58 in LS-DYNA®, a continuum damage mechanics (CDM) composite material law based on Matzenmiller-Lubliner-Taylor (MLT) model, is inadequate in representing the unloading response of composite tubes that form continuous fronds in axial impact testing. To address the issue, two approaches have been attempted. The first one is to modify the compressive unloading response. The second one is to incorporate plasticity in a CDM framework. Both approaches were tested in an MLT theory based user material model. The modified MLT models improved the stability of the tube crush simulations and the simulation results.

MaterialModeling-4.pdf — PDF document, 2147Kb