IDENTIFICATION OF THE COPPER DEFORMATION MODEL FOR IMPACT DYNAMICS PROBLEMS |
| 1 | |
| 2014 |
| scientific article | 539.3 | ||
| 256-261 | dynamic deformation, flow stress, adiabatic heating, equation of state, strain rate hardening, thermal softening, plastic strain, identification, verification. |
| Using the example of copper, we consider the specific features of high strain rate deformation of structural metals and alloys, with special attention to the adiabatic nature of such processes. A correction procedure is described for preparing dynamic stress-strain curves to be used in model identification of elasto-plastic mathematical models. As an example, the Johnson-Cook equation of state is identified for M1 copper. This model was verified using special experimental procedures with good qualitative and quantitative agreement between the experimental and numerical results. |
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