API和国内石油行业标准都规定了各种钻具所能承受的最大轴向拉力，即“抗拉强度”（Tensile Capacity），钻具实际所受的轴向拉力如果超过该值，将发生拉断失效。因此在设计阶段进行钻具的抗拉强度校核是非常必要的。
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When the skin is incapable of withstanding overstretching as the skin fibres reach their tensile capacity, 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。
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.
当配筋特征值不大于0.2时，承载能力极限状态下碳纤维片材的拉应变可以接近或超过允许拉应变，因此可以有效地对受弯构件正截面承载力进行加固；
Meanwhile, strain hardening capacity of FSW joint in cooling water also enhances, and the tensile fracture presents the characteristic of microporous polymeric fracture.
接头的应变硬化能力增强，拉伸断口呈现出微孔聚合型断裂特征。
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