基于位错运动的弹簧应力松弛方程应用研究  

Research on the Application of Spring Stress Relaxation Equation Based on Dislocation Motion

作　　者：贺毅[1] 王心雨 金应荣[1] 苏懿 冉渭 廖云庭 刘青琳 HE Yi;WANG Xinyu;JIN Yingrong;SU Yi;RAN Wei;LIAO Yunting;LIU Qinglin(School of Materials Science and Engineering,Xihua University,Chengdu 610039 China)

机构地区：[1]西华大学材料科学与工程学院,四川成都610039

出　　处：《西华大学学报（自然科学版）》2024年第6期96-102,共7页Journal of Xihua University:Natural Science Edition

基　　金：西南技术工程研究所合作基金项目(HDHDW5902020301);西华大学“西华杯”大学生创新创业项目(xhb2023061)。

摘　　要：评价弹簧的强压处理工艺、预测弹簧的贮存寿命和载荷损失具有重要的工程意义。本文对圆柱螺旋压缩弹簧进行应力松弛试验,利用基于位错运动的应力松弛方程对加速试验数据进行拟合分析,提出评价弹簧强压处理效果的方法,并对应力松弛方程进行线性化处理,导出弹簧寿命预测方程和载荷预测方程,给出计算载荷损失误差的方法,预测圆柱螺旋压缩弹簧的寿命和载荷损失,并对其进行试验验证。结果表明:本文提出的弹簧应力松弛方程效果较好,载荷损失预测误差在±2%以内。It is of great significance to evaluate the effect of forced compression treatment for spring and to predict the storage life and load loss of springs.In this paper,the stress relaxation test of cylindrical spiral compression spring was carried out.Started from the stress relaxation modified equation based on dislocation movement,the accelerated test data were fitted and analyzed,and a method to evaluate the ef-fect of forced compression treatment for spring was proposed.Then,the new stress relaxation equation was linearized,and the spring life prediction equation and load prediction equation were derived respectively,and the method for calculating the load loss error was given,and the life and load loss of the cylindrical spiral compression spring were predicted,and it was verified by experiment.The results show that the spring stress relaxation equation is effective and the error of load loss prediction is within±2%.

关 键 词：弹簧 加速试验 寿命预测 载荷损失预测 预测误差 

分 类 号：TG142.75[一般工业技术—材料科学与工程]