含缺陷矿用圆环链裂尖应力应变对材料力学参量的敏感性分析  

Analysis on sensitivity of stress and strain at crack tip of defective mine-used round-link chain to mechanical parameters of material

作　　者：樊亚玲[1] 杨宏亮 FAN Yaling;YANG Hongliang(School of Mechanical&Electrical Engineering,Xi'an Railway Vocational&Technical Institute,Xi'an 710014,Shaanxi,China;Center of Engineering Training,Xi'an University of Science&Technology,Xi'an 710054,Shaanxi,China)

机构地区：[1]西安铁路职业技术学院机电工程学院,陕西西安710014 [2]西安科技大学工程训练中心,陕西西安710054

出　　处：《矿山机械》2021年第3期51-55,共5页Mining & Processing Equipment

基　　金：国家自然科学基金(51475362);西安科技大学博士启动金(8150120009)。

摘　　要：为了研究含缺陷矿用圆环链裂尖应力应变的特性,采用有限元模拟方法,分析了材料不同力学参量变化时,裂尖 Mises 应力和等效塑性应变对材料不同力学参量的敏感性。分析结果表明:材料的力学参量变化幅度相同时,裂尖应力应变对材料力学参量的敏感性不同;裂尖 Mises 应力对材料的硬化指数最敏感,对材料的泊松比最不敏感;裂尖等效塑性应变对材料的屈服强度最敏感,对材料的泊松比最不敏感。To understand the characteristics of stress and strain at crack tip of the defective mine-used round-link chain,the finite element simulation method was used to analyze the sensitivity of Mises stress and equivalent plastic strain at crack tip to various mechanical parameters of material when the parameters changed.The results showed:While variousmechanical parameters of material changed in the same scale,the sensitivity of stress and strain at crack tip to the parameters was different.Mises stress at crack tip wasthe most sensitive to the hardening index of material and the least sensitive to Poisson’s ratio of material.Equivalent plastic strain wasthe most sensitive to the yield strength of material,and the least sensitive to Poisson’s ratio of material.

关 键 词：矿用圆环链 裂尖 力学参量 应力应变 敏感性 

分 类 号：TG174.3[金属学及工艺—金属表面处理]