Effective Mesomechanical Modeling of Triaxially Braided Composites for Impact Analysis with Failure

摘要

A finite element analysis (FEA) based mesomechanical modeling approach suitable for two-dimensional triaxially braided composite (TDTBC) materials and structures under high speed impact was developed. This new modeling approach is capable of considering the braiding geometry and architecture as well as the mechanical behavior of fiber tows, matrix, and the fiber tow interface, making it feasible to study the details of localized behavior and global response that happen in the complex constituents. Additionally, it is capable of simulating inter-laminar and intra-laminar damage and delamination of braided composites subjected to dynamic loading. With high fidelity in both TDTBC architecture and mechanical properties, it is well suited to analyze high speed impact events with improved simulation capability in both accuracy and efficiency. Special attention was paid to the applicability of the method to relatively large scale components or structures.