Because of flexible object of wire rope, it is inevitable to produce elastic spread under the load, the value of critical parameter-elastic modulus relates to the precision and safety in designing of machinery.

• 钢丝绳属挠性体，负荷时不可避免出现弹性伸长，其关键参数弹性模量的取值问题关系到机械设计的精度与安全性。