A comparison of current models for nonlinear rate-dependent material behavior of crystalline solids
Abstract
Three theories for prediction of inelastic deformation which are based on considerations of the microstructural behavior of materials are reviewed. The mechanics of continua with internal state variables and the historical development of constitutive modeling are summarized. A detailed discussion, including chronological development, review of theory, and method of determination of material parameters, of each model follows. An experimental data base is established from which the material parameters of the constitutive equations are calculated. Finally computer simulations of various load histories are performed and compared to the experiment, and conclusions of the ability of each theory to model inelastic deformation are drawn.
- Publication:
-
In its Integrated Research in Constitutive Modelling at Elevated Temperatures
- Pub Date:
- June 1986
- Bibcode:
- 1986isrcmrept.....B
- Keywords:
-
- Computerized Simulation;
- Constitutive Equations;
- Elastic Deformation;
- Loads (Forces);
- Metals;
- Microstructure;
- Stress-Strain Relationships;
- Equations Of State;
- Nonlinearity;
- Predictions;
- Time Series Analysis;
- Viscoelasticity;
- Solid-State Physics