Experimental investigation of Terfenol-D's elastic modulus
Experimental investigation of Terfenol-D's elastic modulus
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DOI：
10.1177/1045389x07077854
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发表时间：
2008-05-01
影响因子：
2.7
通讯作者：
Flatau, Alison
中科院分区：
文献类型：
--
作者：
Kellogg, Rick;Flatau, Alison
超磁致伸缩Terfenol-D中杨氏模数(Delta E效应)的变化对Terfenol-D换能器的性能和建模有重要影响。在这项研究中，Terfenol-D的弹性模数在受控的热、磁和机械加载条件下进行了表征。准静态循环压缩应力测试方法被用来量化在很大范围的直流磁场和应力范围内杨氏模数的变异性。通过直流外加磁场的变化，可以显示出四倍以上的表观弹性模数变化。文中还研究了循环应力幅值减小导致Terfenol-D表观弹性模数增加的影响。
The variability of Young's modulus (the Delta E effect) in giant magnetostrictive Terfenol-D has a significant impact on the performance and modeling of Terfenol-D transducers. In this investigation, Terfenol-D's modulus of elasticity is characterized under controlled thermal, magnetic, and mechanical loading conditions. Quasistatic cyclic compressive stress testing methods are used to quantify the variability in Young's modulus over a wide range of DC applied magnetic fields and stresses. Apparent elastic modulus changes of four-fold or more are demonstrated through the variation of a DC applied magnetic field. The effect of decreasing cyclic stress amplitude giving rise to an increase in Terfenol-D's apparent elastic modulus is also examined.