A Consistent Kinetics Porosity (CKP) Model
Year: 1999
Type: conference-paper
Abstract: A theory is presented for the mechanical response of porous media to high-strain-rate deformations. The model is “consistent” because each feature is incorporated in a manner that is mathematically compatible with all the other features. Unlike simple p-α models, the onset of pore collapse depends (via a user-adjustable yield function) on the amount of shear present. The elastic part of the strain rate is linearly related to the stress rate, except for nonlinear contributions due to the change in the elastic moduli upon pore collapse. The inelastic part of the strain rate includes parts from plastic deformation of the matrix material, pore nucleation, and phase transformations in the matrix material. The plastic strain rate is taken normal to the yield surface. Consequently, if phase transformation and/or nucleation are simultaneously occurring, the inelastic strain rate will be non-normal to the yield surface. The matrix yield stress is permitted to harden linearly. Plastic volume changes of the matrix m...
Author: Rebecca M. Brannon
Language: English
Subfield: Computational Mechanics
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2802255871