Experimental and theoretical investigation of the frequency effect on low cycle fatigue of shape memory alloys
Experimental and theoretical investigation of the frequency effect on low cycle fatigue of shape memory alloys
复制标题
频率对形状记忆合金低周疲劳影响的实验和理论研究
DOI：
10.1016/j.ijplas.2016.11.012
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发表时间：
2017-03
影响因子：
9.8
通讯作者：
Zhang Weihong
中科院分区：
文献类型：
--
作者：
Zhang Yahui;You Yajun;Moumni Ziad;Anlas Gunay;Zhu Jihong;Zhang Weihong
研究了循环加载频率对形状记忆合金伪弹性行为和低周疲劳性能的影响。为此，应变和应力控制的拉伸疲劳试验NiTi线进行。首先对材料进行几个循环的训练，以稳定磁滞回线并达到安定状态，然后进行疲劳测试。用红外摄像机测量了金属丝的表面温度，在不同的总应变幅下进行了应变控制试验，在不同的最大应力值下进行了应力控制试验。随着频率的增加，应变控制载荷下的疲劳寿命显示出下降的趋势，所有的应变幅测试。然而，应力控制试验的情况更为复杂，因为疲劳寿命显示出最大应力依赖的趋势：对于不同的最大应力，疲劳寿命随频率的变化趋势是不同的。基于SMA中热力耦合的一些考虑，对SMA的力学响应和疲劳寿命随加载频率的演变给出了理论解释。提出了一种新的基于应变能的疲劳模型，并通过不同载荷比下的试验进行了验证。
The effect of cyclic loading frequency on pseudoelastic behavior and low cycle fatigue of shape memory alloys (SMAs) is investigated. To this end, strain and stress controlled tensile fatigue tests on NiTi wires are performed. The material is first trained for a few cycles to stabilize the hysteresis loop and reach a shakedown state and then submitted to fatigue tests. An infrared camera is used to measure the surface temperature of the wire.Strain-controlled tests are performed at different total strain amplitudes, and stress-controlled ones are performed at different maximum stress values. As the frequency increases, the fatigue lifetime under strain controlled loading shows a decreasing trend for all the strain amplitudes tested. The situation in stress controlled tests is however more complicated because the fatigue lifetime shows a maximum stress-dependent trend: for different maximum stresses, the trend in variation of fatigue lifetime with frequency is different. Based on some considerations related to the thermomechanical coupling in SMAs, a theoretical explanation for the evolution of the mechanical response and fatigue lifetime with loading frequency is presented. A new strain-energy based fatigue model is proposed, and is validated by experiments performed under different load ratios.
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影响因子：
1.2
作者：
E. Pieczyska;H. Tobushi;K. Kulasinski;K. Takeda
通讯作者：
E. Pieczyska;H. Tobushi;K. Kulasinski;K. Takeda
影响因子：
--
作者：
J. Simo;J. Ju
通讯作者：
J. Simo;J. Ju
DOI：
10.1016/j.mspro.2014.06.062
发表时间：
2014
期刊：
Procedia Materials Science
影响因子：
--
作者：
V. D. Cocco;F. Iacoviello;S. Natali;V. Volpe;F. Maiolino
通讯作者：
V. D. Cocco;F. Iacoviello;S. Natali;V. Volpe;F. Maiolino
影响因子：
9.8
作者：
M. Anahid;Somnath Ghosh
通讯作者：
M. Anahid;Somnath Ghosh
DOI：
10.1201/9780849391088.ax2
发表时间：
2006-12
期刊：
--
影响因子：
--
作者：
V. Konchits
通讯作者：
V. Konchits