GB/T 8358—2014钢丝绳破断拉力测试断距规定合理性商榷

Discussion of GB/T 8358—2014 wire rope breaking force test breaking distance reasonable

基于对ISO 3108:2017(E)、ISO 2408:2017(E)等标准关于钢丝绳破断拉力测试规定研究,考虑到一个捻距长度钢丝绳是理论上最短长度钢丝绳,结合6 d在数值上近似等于一个钢丝绳捻距,分析认为,对任何直径的钢丝绳进行破断拉力测试,为测得其真实破断拉力,试样的破断位置距测试机夹头最小距离应该是6 d,GB/T 8358—2014规定试样破断位置距测试机夹头最小距离在6 d或50 mm(两者取其小者)选择的合理性值得商榷。

Based on ISO 3108:2017(E),ISO2408:2017(E)and other standards on breaking force test of wire rope,considering that one lay length wire rope is theoretically the shortest length of wire rope,combined with 6 d in numerical approximate equal to one lay length of wire rope,analysis believes that any diameter of wire rope breaking force test,to measure its real breaking force,The minimum distance between breaking position of sample and chuck of testing machine should be 6 d,and rationality of selection of GB/T 8358—2014 stipulates that the minimum distance between breaking position of sample and chuck of testing machine is 6 d or 50 mm(smaller of the two)is discussed.