超弹性形状记忆合金棒力学性能的实验研究  

Experimental study on mechanical behavior of superelastic shape memory alloy bar

作　　者：任文杰[1,2,3] 王利强[4] 贾俊森[1,2] 贾茹[1,2] 

机构地区：[1]河北工业大学土木工程学院,天津300401 [2]河北省土木工程技术研究中心,天津300401 [3]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [4]天津职业技术师范大学电子工程学院,天津300222

出　　处：《功能材料》2013年第2期258-261,共4页Journal of Functional Materials

基　　金：国家自然科学基金面上资助项目(50978081);教育部高等学校博士学科点专项科研基金资助项目(20091317120002);河北省教育厅百名优秀创新人才支持计划资助项目(CPRC011);住宅与城乡建设部科学技术资助项目(2011-K3-18);大连理工大学海岸和近海工程国家重点实验室开放基金资助项目(LP0902)

摘　　要：对超弹性形状记忆合金(SMA)棒进行力学性能实验,研究了荷载循环、应变幅值和荷载频率对其滞回曲线以及耗能量、损耗因子、残余应变的力学参数的影响。结果表明,应力-应变曲线在循环加卸载中逐渐变化并趋于稳定;耗能量和损耗因子均随应变幅值的增加而增加,随荷载频率的增加而减小;稳定的SMA棒的超弹性、耗能能力和阻尼性能均较差,但其输出力较大,故可作为复位或限位装置用于土木工程中。Experiments on the mechanical behavior of the superelastic SMA bar are performed. Cyclic number, strain amplitude and loading frequency are considered to investigate their effects on the hysteretic curve and the mechanical parameters, such as energy dissipation per cycle, loss factor and residual strain. The results show that the stress-strain curve changes gradually to reach an approximately steady state with the increasing number of loading cycles. As strain amplitude increases, the energy dissipation and the loss factor increase. As loading frequency increases, the energy dissipation and the loss factor decrease. The steady superelastic SMA bar has the poor capabilities of superelasticity, energy dissipation and damping property, so the material can be used as recentering devices or restrainers in the civil engineering.

关 键 词：形状记忆合金棒 超弹性 力学实验 

分 类 号：TG139.6[一般工业技术—材料科学与工程] TU352.11[金属学及工艺—合金]