檢視抗拉强度的原始碼

[[File:抗拉强度.jpg|缩略图|[https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E6%8A%97%E6%8B%89%E5%BC%BA%E5%BA%A6&step_word=&hs=0&pn=0&spn=0&di=176770&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=0&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=undefined&cs=2415503643%2C2351381900&os=3178516624%2C3122336124&simid=4214150760%2C476335805&adpicid=0&lpn=0&ln=1654&fr=&fmq=1622501701847_R&fm=&ic=undefined&s=undefined&hd=undefined&latest=undefined&copyright=undefined&se=&sme=&tab=0&width=undefined&height=undefined&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=https%3A%2F%2Fgimg2.baidu.com%2Fimage_search%2Fsrc%3Dhttp%3A%2F%2Fwww.51wendang.com%2Fpic%2F383c22ccdffb15672c022a76%2F1-688-jpg_6_0_______-605-0-0-605.jpg%26refer%3Dhttp%3A%2F%2Fwww.51wendang.com%26app%3D2002%26size%3Df9999%2C10000%26q%3Da80%26n%3D0%26g%3D0n%26fmt%3Djpeg%3Fsec%3D1625093708%26t%3D13f335b81ee5985a1dc689ee4c497f53&fromurl=ippr_z2C%24qAzdH3FAzdH3Fooo_z%26e3Bc8ojg1wg2_z%26e3Bv54AzdH3F15vAzdH3Fnbnvddvv1uuk8cm0dvaddw0m&gsm=1&rpstart=0&rpnum=0&islist=&querylist=&force=undefined 原图链接][https://www.51wendang.com/doc/383c22ccdffb15672c022a76 来自无忧文档]]]
'''抗拉强度'''（tensile strength）是金属由均匀塑性形变向局部集中塑性变形过渡的[[临界值]]，也是金属在静拉伸条件下的最大承载能力。抗拉强度即表征材料最大均匀塑性变形的抗力，拉伸试样在承受最大拉应力之前，变形是均匀一致的，但超出之后，金属开始出现缩颈现象，即产生集中变形；对于没有（或很小）均匀塑性变形的脆性材料，它反映了材料的断裂抗力。符号为Rm（GB/T 228-1987旧国标规定抗拉强度符号为σb），单位为MPa。