热型连铸柱状晶Cu-Al-Be合金丝力学性能试验研究  

Experimental study of mechanical behavior of columnar grain Cu-Al-Be alloy wire produced using hot mold continuous casting method

作　　者：胡晓斌[1] 刘坤[1] 蔡莲淑[2] 黎沃光[2] 

机构地区：[1]武汉大学土木建筑工程学院,湖北武汉430072 [2]广东工业大学材料与能源学院,广东广州510006

出　　处：《世界地震工程》2017年第2期127-134,共8页World Earthquake Engineering

基　　金：国家自然科学基金项目(51208386);教育部博士点基金项目(20120141120083)

摘　　要：采用循环加载试验,研究了热型连铸柱状晶Cu-Al-Be合金丝的超弹性力学性能,重点考察了合金丝循环加载次数及加载速率的影响,并基于试验结果提出了二种本构模型。结果表明:Cu-Al-Be合金丝具有很好的塑性变形能力和可恢复变形能力;经过循环加载训练后的Cu-Al-Be合金丝具有稳定的滞回性能,且残余变形较小;Cu-Al-Be合金丝的力学性能具有很强的率相关性;修正Wilde模型和FS模型均具有较高的分析精度,且后者计算效率更高。In this paper, the superelastic mechanical behavior of columnar grain Cu-Al-Be alloy wire produced using hot mold continuous casting method was studied by cyclic loading test focusing on investigating the influence of the number of cyclic loading and loading rate. Based on the test results, two constitutive models were proposed. The results show that the Cu-Al-Be alloy wire has large plastic and recoverable deformation capabilities. After trained by cyclic loading, the Cu-Al-Be alloy wire has a stable hysteresis performance with minimal residual deformation. In addition, the mechanical behavior of the Cu-Al-Be alloy wire is highly dependent on the loading rate. The proposed modified Wilde model and FS model both have high analysis precision, while the latter has higher computational ef- ficiency.

关 键 词：Cu-Al-Be合金 超弹性 本构模型 循环加载 率相关性 

分 类 号：TU352[建筑科学—结构工程]