Abstract
A nonlinear, time-dependent theory is developed to examine the viscoplastic creep behavior of a two-phase composite with the laminated structure. Here we consider the case that both phases may be elastic-viscoplastic. The rate-dependent constitutive equations of the ductile phases are nonlinear, exhibiting the work-hardening characteristics and strain-rate sensitivity. A modern unified theory is adopted for the constitutive equations. To estimate the nonlinear elastic-viscoplastic response of the two-phase system, a linear viscoelastic comparison composite with an identical microgeometry is introduced. The viscoelastic properties of the comparison phases are taken to be of the Maxwell type, with a shear viscosity equal to the `secant' shear viscosity of the nonlinear viscoplastic phase at a given stage of deformation. This theory is then applied to study the transversely isotropic creep behavior of the nonlinear viscoplastic composite at various concentrations of the constituent phases.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 65-75 |
| Number of pages | 11 |
| Journal | American Society of Mechanical Engineers, Applied Mechanics Division, AMD |
| Volume | 202 |
| State | Published - 1995 |
| Event | Proceedings of the 1995 Joint ASME Applied Mechanics and Materials Summer Meeting - Los Angeles, CA, USA Duration: Jun 28 1995 → Jun 30 1995 |
All Science Journal Classification (ASJC) codes
- Mechanical Engineering