dilatancy hardening

例句：

1. 1.The material undergoes dilatancy hardening during the process of plastic deformation.
   材料在塑性变形过程中经历膨胀硬化。
2. 2. This is an important factor in determining the properties of the material during dilatancy hardening.
   这是确定材料在膨胀硬化过程中性质的重要因素。
3. 3.During dilatancy hardening, the material's internal structure changes significantly.
   在膨胀硬化过程中，材料的内结构发生了显著变化。