Nonlinear Multiscale Modeling of 3D Woven Fiber Composites under Ballistic Loading
Final rept. 15 Jun 2009-14 Jun 2013
RENSSELAER POLYTECHNIC INST TROY NY
Pagination or Media Count:
The objective of the current project is the development of the fundamentals of a novel two-scale multiscale computational method for the nonlinear damage and failure analysis of 3D woven fiber composites under ballistic loading. Since material behavior is determined by its microstructure, it is essential to accurately model the physics at that scale. The macroscale analysis provides a useful insight into the underlying high strain rate physics which is essential in modeling the lower micro-scale. In particular a rate dependent constitutive approach is being developed coupled with continuum damage mechanics suitable for polymer materials. The effect of contact parameters on the underlying damage processes is being studied and worked on. We further develop a material model suitable particularly for loading of composites in the high strain rate regime. This is a significant development from the previous model where strain rate sensitivity is a-priori postulated for the matrix dominated modes in the small strain framework. We focused on developing a general homogenized anisotropic material model and obtained results which can be implemented in a finite element framework for high strain rate loading.
- Laminates and Composite Materials