An experimental verification of the one-dimensional static Willis-form equations

An experimental verification of the one-dimensional static Willis-form equations
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一维静态Willis型方程的实验验证

DOI:
10.1016/j.ijsolstr.2017.06.005
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发表时间:
2017-02
影响因子:
3.6
通讯作者:
Xiang Z H
Xiang Z H
中科院分区:
工程技术2区
文献类型:
--
作者:
Yao R W;Gao H X;Sun Y X;Yuan X D;Xiang Z H

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本文研究了一重软弹簧作定常圆周运动时的特性。由于弹簧是不均匀的,由于离心力,人们可以严格证明,它遵循一维静态威利斯形式方程。理论预测与实验结果吻合得很好。这进一步表明,这些方程可以清楚地理解应力刚化和自旋软化效应。这些结果表明,Willis形式的方程可以给出有限变形问题的非常精确的线性近似,也有助于澄清经典的材料框架无差异原理的概念。
This paper investigates the behavior of a heavy soft spring in steady circular motion. Since the spring is inhomogeneous due to centrifugal force, one can rigorously prove that it follows the one-dimensional static Willis-form equations. The theoretical predictions agree very well with experimental results. It further demonstrates that these equations can give a clear understanding of the stress-stiffening and spin-softening effect. These findings reveal that the Willis-form equations can give very accurate linear approximations of finite deformation problems and are also helpful to clarify the classical concept of the principle of material frame indifference.
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