超弹性形状记忆合金棒力学性能的实验研究

功能材料, 2013, 44(2): 258-261.

超弹性形状记忆合金棒力学性能的实验研究

1.河北工业大学土木工程学院,天津300401;河北省土木工程技术研究中心,天津300401;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

2.天津职业技术师范大学电子工程学院,天津300222

3.河北工业大学土木工程学院,天津300401;河北省土木工程技术研究中心,天津300401

4.河北工业大学土木工程学院,天津300401;河北省土木工程技术研究中心,天津300401

基金项目: 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) 住宅与城乡建设部科学技术资助项目(2011-K3-18) 国家自然科学基金面上资助项目(50978081) 河北省教育厅百名优秀创新人才支持计划资助项目(CPRC011) 教育部高等学校博士学科点专项科研基金资助项目(20091317120002)

关键词：形状记忆合金棒 , 超弹性 , 力学实验

Experimental study on mechanical behavior of superelastic shape memory alloy bar

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.

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