【摘要】 GB/T 5027—2016从设置以"真实塑性应变"和"真实应变"为理论基础的两种供用户选择的计算方法,为r值下标的概念增加工程应变的内容,完善L0值的赋值规定,以及补充区间r值回归计算过原点最新研究成果等几个方面修订GB/T 5027—2007,提高r值测定标准的准确度、可操作性、适用性和灵活性。更多还原

【Abstract】 Some key changes in GB/T 5027—2016 are as follows: setting two r value calculation methods in which method A is based on true plastic strain and method B is based on true strain, adding engineering strain conception in the footnote of r value, modifying the requirement of the assignation of L0 and supplementing the latest research results on linear regression for range r value through the origin so as to increasing the accuracy, serviceability, feasibility and mobility of this standard.更多还原