A Multiscale Framework for Designing High-Toughness Composite Materials
Abstract
Development of high-toughness composite materials requires careful microstructure design as geometric distribution of phases, constituent properties and interface attributes combine to influence the deformation and failure behavior of composites. In two-phase composite materials, reinforcement cracking and interface debonding are two competing fracture mechanisms observed during the crackâmicrostructure interactions. The activation of each fracture mechanism largely depends on the microstructure and ultimately determines the fracture toughness of composites. The objective of this study is to quantify the competition of the two fracture mechanisms as function of microstructure and find their intricate coupling with material fracture toughness. The multiscale material design framework developed here allows fracture toughness to be predicted through cohesive element-based fracture simulation and digital image correlation measurement. Based on the numerical and experimental results, two analytical models are developed for fracture mode determination of both brittle and ductile composites. Although calculations carried out concern ceramic composites Al2O3/SiC and metal matrix composites Al/SiC, the approach developed can be applied to other composite material systems.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 07, 2019
- Source ID
- 10.1142/s0219876219400085
Entities
People
- Yan Li
Organizations
- California State University
- United States Army Research Laboratory