When the skin is incapable of withstanding overstretching as the skin fibres reach their tensilecapacity, stretch marks form.
当皮肤无法承受过度的皮肤纤维达到其拉伸能力,妊娠纹的形式。
2
When the ratio not more than 0.2, CFRP tensile strain can reach or exceed the permissible strain at ultimate capacity state, and therefore CFRP can work efficiently.
Meanwhile, strain hardening capacity of FSW joint in cooling water also enhances, and the tensile fracture presents the characteristic of microporous polymeric fracture.