Accession Number : ADA591214


Title :   Nonlinear Multiscale Modeling of 3D Woven Fiber Composites under Ballistic Loading


Descriptive Note : Final rept. 15 Jun 2009-14 Jun 2013


Corporate Author : RENSSELAER POLYTECHNIC INST TROY NY


Personal Author(s) : De, Suvranu


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA591214


Report Date : 11 Jul 2013


Pagination or Media Count : 43


Abstract : 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.


Descriptors :   *COMPOSITE MATERIALS , *FIBERS , *LOADS(FORCES) , ANISOTROPY , DAMAGE , FINITE ELEMENT ANALYSIS , IMPACT , MECHANICS , MODELS , NUMERICAL METHODS AND PROCEDURES , ORTHOGONALITY , STRAIN RATE , THERMODYNAMICS , THREE DIMENSIONAL , VISCOELASTICITY , YARNS


Subject Categories : Laminates and Composite Materials
      Textiles
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE