Metal flow takes place within the plasticrange of the metal, so that the bend retains a permanent set after removal of the applied stress.
金属的流动发生在金属的塑性变形范围之内，因此在施加的外力去除之后弯曲保持永久的变形。
2
Some part of the casing reaches plasticrange in the combined load state and the casing may be cracked under 1.5 times of the combined load.
在组合载荷下机匣局部出现塑性，在1.5 倍组合载荷作用下机匣可能发生破坏。
3
The elastic range, the plasticrange (during which the material flows at a constant stress), the strain-hardening range, and the range during which necking occurs, terminating in fracture.