Models for predicting damage evolution in metal matrix composites subjected to cyclic loading
- Texas A and M Univ., College Station, TX (United States). Center for Mechanics of Composites
A thermomechanical analysis of a continuous fiber metal matrix composite (MMC) subjected to cyclic loading is performed herein. The analysis includes the effects of processing induced residual thermal stresses, matrix inelasticity, and interface cracking. Due to these complexities, the analysis is performed computationally using the finite element method. Matrix inelasticity is modelled with a rate dependent viscoplasticity model. Interface fracture is modelled by the use of a nonlinear interface constitutive model. The problem formulation is summarized, and results are given for a four-ply unidirectional SCS-6/{beta}21S titanium composite under high temperature isothermal mechanical fatigue. Results indicate rate dependent viscoplasticity can be a significant mechanism for dissipating the energy available for damage propagation, thus contributing to improved ductility of the composite. Results also indicate that the model may be useful for inclusion in life prediction methodologies for MMC`s.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- Department of Defense, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 46576
- Report Number(s):
- SAND-95-0351C; CONF-950788-6; ON: DE95007734; CNN: Grant F49620-94-1-0341
- Resource Relation:
- Conference: International conference on computational engineering science, Mauna Lani, HI (United States), 30 Jul - 3 Aug 1995; Other Information: PBD: [1995]
- Country of Publication:
- United States
- Language:
- English
Similar Records
Prediction of damage evolution in continuous fiber metal matrix composites subjected to fatigue loading
Inelastic deformation of titanium matrix composites under multiaxial loading