檢視延伸率的原始碼

[[File:延伸率.jpg|缩略图|[https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E5%BB%B6%E4%BC%B8%E7%8E%87&step_word=&hs=0&pn=2&spn=0&di=1320&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=2367637178%2C3605753560&os=599582618%2C789140007&simid=0%2C0&adpicid=0&lpn=0&ln=1833&fr=&fmq=1623150063375_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%2F5b0988e595225.cdn.sohucs.com%2Fimages%2F20180129%2F6f30c96d6d6b4096b09508cc9458fb06.jpeg%26refer%3Dhttp%3A%2F%2F5b0988e595225.cdn.sohucs.com%26app%3D2002%26size%3Df9999%2C10000%26q%3Da80%26n%3D0%26g%3D0n%26fmt%3Djpeg%3Fsec%3D1625742071%26t%3De6dd1575554ee5aa75b3bdbc9d94fc6e&fromurl=ippr_z2C%24qAzdH3FAzdH3Fooo_z%26e3Bf5i7_z%26e3Bv54AzdH3FwAzdH3Fd8lc90lml_mm8alb&gsm=1&rpstart=0&rpnum=0&islist=&querylist=&nojc=undefined 原图链接][https://www.sohu.com/a/219547969_661098 来自搜狐]]]
'''延伸率'''δ指的是描述材料塑性性能的指标——延伸率δ和截面收缩率。延伸率即试样拉伸断裂后标距段的总变形ΔL与原标距长度L之比的百分数：δ=ΔL/L×100%。