plastic theory of failure

例句：

1. 1. The plasticity theory of failure suggests that the material can be deformed without breaking.
   塑性失效理论表明，材料可以在不断裂的情况下变形。
2. 2. This plasticity theory of failure has been proven to be effective in improving the durability of materials.
   这种塑性失效理论已被证明在提高材料耐用性方面是有效的。
3. 3. In the plasticity theory of failure, the material is allowed to deform under a controlled load until it reachesits ultimate strength.
   在塑性失效理论中，允许材料在受控载荷下变形，直到达到其极限强度。