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A viscoplastic theory applied to copper
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Verrilli, Michael J. Freed, Alan D. |
| Copyright Year | 1988 |
| Description | A phenomenologically based viscoplastic model is derived for copper. The model is thermodynamically constrained by the condition of material dissipativity. Two internal state variables are considered. The back stress accounts for strain-induced anisotropy, or kinematic hardening. The drag stress accounts for isotropic hardening. Static and dynamic recovery terms are not coupled in either evolutionary equation. The evolution of drag stress depends on static recovery, while the evolution of back stress depends on dynamic recovery. The material constants are determined from isothermal data. Model predictions are compared with experimental data for thermomechanical test conditions. They are in good agreement at the hot end of the loading cycle, but the model overpredicts the stress response at the cold end of the cycle. |
| File Size | 701399 |
| Page Count | 15 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19880012113 |
| Archival Resource Key | ark:/13960/t6c29sk41 |
| Language | English |
| Publisher Date | 1988-01-01 |
| Access Restriction | Open |
| Subject Keyword | Structural Mechanics Phenomenology Thermodynamics Stress-strain Relationships Anisotropy Dissipation Cyclic Loads Viscoplasticity Kinematics Copper Thermomechanical Treatment Creep Analysis Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
