研究材料动态本构特性中的重要作用

The important role of stress waves in the study on dynamic constitutive behavior of materials by SHPB

1.
Mechanics and Materials Science Research Center, Ningbo University, Ningbo 315211, Zhejiang, China;
2.
Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China

摘要: 在材料动态本构关系的研究中，不论是由波传播信息反求材料本构关系，即所谓解第二类反问题，还是利用应力波效应和应变率效应解耦的方法（如SHPB技术），应力波传播实际上都起着关键作用。在一般性讨论的基础上，就SHPB试验技术分析了应力波传播如何影响材料动态本构特性的有效确定。对于应力/应变沿试件长度均匀分布假定以及一维应力波假定，着重进行了分析。
- 爆炸力学 /
- 应力波传播 /
- SHPB /
- 材料动态本构特性 /
- 爆炸/冲击载荷 /
- 应变率效应
Abstract: Two approaches are usually used in the studies of dynamic constitutive relation of materials. One is to determine the constitutive relation from the wave propagating signals (the so-called second class of inverse problems). The another is to de-couple the stress wave effects of structures and the strain-rate effects of materials. In both approaches, stress wave propagation plays a key role. In the present paper, some important aspects associated with this problem are discussed, particularly in relation to the SHPB technique. Both the assumption of uniform distribution of stress and strain along the specimen and the assumption of uniaxial stress are analyzed in detail.
- mechanics of explosion /
- stress wave propagation /
- SHPB /
- explosion/impact loading /
- strain-rate effect /
- dynamic constitutive relation