Role of interfaces on the ductile fracture process of discontinuous fiber reinforced composites
Role of fiber morphology, interface failure and void nucleation mechanisms within the matrix on the deformation and fracture behavior of discontinuous fiber reinforced composites was numerically investigated. The matrix was modelled using a constitutive relationship that accounts for strength degradation resulting from the nucleation and growth of voids, and fibers are assumed to be elastic. The debonding behavior at the fiber interfaces was simulated in terms of a cohesive zone model which describes the decohesion by both normal and tangential separation. The results indicate that in the absence of interface failure, for a given matrix failure mechanism the fiber morphology strongly affects the strength and ductility of discontinuous fiber reinforced composites. The weak interfacial behavior can significantly increase the ductility without sacrificing the strength for certain fiber morphology and for certain void nucleation mechanisms.
- Research Organization:
- Ames Lab., IA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 10116094
- Report Number(s):
- IS-M-736; CONF-930246-2; ON: DE93004464
- Resource Relation:
- Conference: Advanced composites `93: international conference on advanced composite materials (ICACM),Wollongong (Australia),15-19 Feb 1993; Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
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Ductile fracture process of discontinuous fiber reinforced composites
Role of interfaces on the ductile fracture process of discontinuous fiber reinforced composites