96.5Sn-3.5Ag钎料合金的时相关单轴应变循环变形行为及其本构关系研究  

The Cyclic Deformation Behaviors and Constitutive Description of 96.5Sn-3.5Ag Solder Alloy Under Uniaxially Cyclic Strain

作　　者：罗艳[1] 杨显杰[1] 高庆[1] 蔡力勋[1] 

机构地区：[1]西南交通大学,成都610031

出　　处：《应用力学学报》2007年第3期429-433,共5页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金(10372086);教育部博士点基金(20040613002)

摘　　要：在室温下对96.5Sn-3.5Ag钎料合金进行了不同加载波形下的单轴应变循环实验。研究了在具有不同保持时间、不同应变率、不同应变幅值及其历史对材料的循环变形行为的影响。基于材料时相关变形行为,提出了统一粘塑性本构模型,并对该材料的变形行为进行本构模拟。实验结果表明:该钎料合金单轴变形行为具有应变率、保持时间以及应变幅值依赖性。本构关系的预言结果与实验结果吻合得一致性说明该种模型能够很好地描述材料的单轴应变循环变形行为。Uniaxial cyclic strain tests for 96.5Sn-3.5Ag solder alloy and conducted under different loading waveforms at room temperature.The effects of the dwell time,strain rate,strain amplitude and their histories on the cyclic deformation behavior are investigated.A unified viscoplastic model is proposed based on the time dependent deformation behavior to describe the constitutive behaviors of this material.The experimental results show that the uniaxial deformation behavior of the solder alloy is significantly dependent on strain rate,dwell time and strain amplitude.The coincidence of the experimental with predicted results demonstrates that the model enables to satisfactorily describe the viscoplastic deformation under cyclic strain loading.

关 键 词：钎料合金 时相关变形 保持时间 应变率 循环加载 粘塑性 本构模型 

分 类 号：O344[理学—固体力学] TG113.25[理学—力学]