The elastic range, the plastic range (during which the material flows at a constant stress), the strain-hardening range, and the range during which necking occurs, terminating in fracture.
弹性范围，塑料范围（当材料以不变的应力流动时），应变硬化范围和发生颈缩现象以其断裂终止的范围。
The elastic-plastic deformation of the vessel shell is taken into account in the model to suit for the crack problem of the vessel shell in the plastic deformation range.
模型考虑容器壳体材料的弹性、 塑性变形，适用于容器外壳在塑性变形范围内发生破裂的问题。
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