ULTRASONIC SCATTERING IN POLYCRYSTALLINE MATERIALS UNDER APPLIED LOADS
Previous research on acoustoelasticity has focused primarily on homogeneous materials (isotropic or crystalline) for which ultrasonic wave speed changes as a function of applied stress have been determined.However,the majority of structural materials of interest are heterogeneous such that ultrasonic scattering occurs when the wave length is on the order of the length scale of the microstructure.In this article,scattering from polycrystalline materials under applied stress is examined both theoretically and experimentally.The scattering is governed by the second-order orientation statistics of the grain moduli which depends quadratically on the applied stress.Applications for stress measurements are discussed.
ultrasound wave scattering nonlinear response
J.A.Turner C.Kube G.Ghoshal M.Fateh
Department of Engineering Mechanics, University of Nebraska-Lincoln,W317.4 NH,Lincoln,NE 68588 USA Department of Electrical and Computer Engineering,University of Illinois at Urbana-Champaign,405 N.M U.S.Department of Transportation,Federal Railroad Administration,Office of Railroad Development,1200
国际会议
The Third International Conference on Heterogeneous Material Mechanics(第三届国际非均匀材料力学会议)
上海
英文
713-718
2011-05-22（万方平台首次上网日期，不代表论文的发表时间）