Department of Civil and Environmental Engineering, Northwestern University, Evanston, Illinois 60208, USA.
J Acoust Soc Am. 2011 Jun;129(6):3449-52. doi: 10.1121/1.3583501.
This letter demonstrates that an eigenstrain is induced when a wave propagates through an elastic solid with quadratic nonlinearity. It is shown that this eigenstrain is intrinsic to the material, but the mean stress and the total mean strain are not. Instead, the mean stress and total means strain also depend on the boundary conditions, so care must be taken when using the static deformation to measure the acoustic nonlinearity parameter of a solid.
这封信表明，当波在具有二次非线性的弹性固体中传播时，会产生固有应变。结果表明，这种固有应变为材料固有性质，但平均应力和总平均应变不是。相反，平均应力和总平均应变也取决于边界条件，因此在使用静态变形来测量固体的声非线性参数时必须小心。
