Energy Based Multiscale Modeling with Non-Periodic Boundary Conditions
Abstract
The complex behavior and failure mechanisms of fiber-reinforced composite materials have made multiscale modeling a necessity when determining the response of composite structures. Current multiscale models, which bridge information between the microstructural constituents and the macroscopic response of a composite material are limited to a prescribed set of boundary conditions to kinematically link the macro and micro scales, with the most popular being periodic. This restriction prevents these types of models from accounting for the effects of locally non-periodic regions within a composite structure. One such region is a free-edge boundary, which is a common damage initiation zone for many composite structures. In this work, a semi-concurrent multiscale model is implemented within ABAQUS which allows for non-periodic boundary conditions through the development of an energy based constitutive coupling between the scales whereby Hill's energy condition, or energetic consistency between the macro and micro scales, is preserved. The methodology is applied to examine free-edge effects on 2D lamina RVE's with cohesive fiber/matrix failure within a semi-concurrent scheme.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 13, 2013
- Accession Number
- ADA590198
Entities
People
- Christopher Cater
- Xinran Xiao
Organizations
- United States Army Tank Automotive Research, Development and Engineering Center