| About this Abstract |
| Meeting |
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Symposium
|
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Presentation Title |
Construction of Material Constitutive Model under Ultrasonic Vibration |
| Author(s) |
Yanjin Guan, Zhendong Xie, Jiqiang Zhai, Jun Lin |
| On-Site Speaker (Planned) |
Yanjin Guan |
| Abstract Scope |
Ultrasonic vibration assisted plastic forming technology is a novel metal processing method in which a vibration of high frequency is superimposed on the workpiece or the tooling which can influence greatly on the plastic deformation behaviors of metals. The constitutive modeling under ultrasonic vibration, has important theoretical and practical significances for promoting the engineering application of this promising technology.
Based on the theory of thermally activated dislocation motion and the mechanism of dislocation damping, a crystal plasticity constitutive model of materials under ultrasonic vibration was established, which can reveal the internal mechanism of the softening effect. The effects of evolution of dislocation density, stress, strain, ultrasonic vibration energy on the dislocation motion and proliferation were considered in this model. The model coupled the stress superposition, acoustic softening and acoustic hardening of ultrasonic vibration, the physical mechanism of acoustic softening and acoustic hardening is revealed from the microscopic scale. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |