Inelastic and damage constitutive model for unidirectionally fiber-reinforced composites
- Univ. of Tsukuba (Japan)
Macromechanical constitutive modeling to describe creep deformation and damage of unidirectionally fiber-reinforced metal matrix composites is discussed from phenomenological points of view. First, a damage coupled anisotropic hardening model for transversely isotropic materials is formulated on the basis of the thermodynamic formalism for internal state variable theories and a kinematic hardening model for isotropic materials. Then, an isotropic hardening model is constructed by assuming a particular representation of the kinematic hardening variable. The composite damage is characterized by a scalar variable and a fourth rank anisotropic tensor. These models can describe transient, steady-state and accelerated stages of creep behavior. In a particular case of the isotropic hardening model, an analytical expression for creep rupture time is derived, and it depends on the time and the degree of damage at a saturation state of the hardening variable.
- OSTI ID:
- 175315
- Report Number(s):
- CONF-950686--
- Country of Publication:
- United States
- Language:
- English
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