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首页> 外文期刊>International journal of structural integrity >Transient thermo-elastic disturbances in a visco-elastic semi-space due to moving internal heat source
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Transient thermo-elastic disturbances in a visco-elastic semi-space due to moving internal heat source

机译：内部热源移动引起的粘弹性半空间中的瞬态热弹性扰动

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Purpose - This paper aims to investigate the transient disturbances created by an internal line heat source that suddenly starts moving uniformly inside a visco-elastic half-space. Design/methodology/approach - Generalised theory of thermo-elasticity with relaxation time proposed by Lord-Shulman is applied. The material of the semi-infinite medium is an isotropic visco-elastic solid of Kelvin-Voight type. Fourier and Laplace transform techniques are used. Findings - Applying the Fourier and Laplace transform techniques, expressions for displacement components in the transformed domain are found. These expressions prove the existence of three waves - a modified thermal wave, a visco-elastic wave of defused nature and a transverse visco-elastic wave. Research limitations/implications - Surface displacement components were evaluated on the boundary for only a short time. Originality/value - The paper provides numerical results that are illustrated graphically to highlight the variations of surface displacement components with distance for different values of time, source depth and velocity of the source.
机译：目的-本文旨在研究由内部管线热源突然开始在粘弹性半空间内均匀移动而产生的瞬态干扰。设计/方法/方法-运用Lord-Shulman提出的具有松弛时间的热弹性广义理论。半无限介质的材料是开尔文-沃伊特型的各向同性粘弹性固体。使用了傅里叶和拉普拉斯变换技术。发现-应用傅立叶和拉普拉斯变换技术，可以找到变换域中位移分量的表达式。这些表达式证明了三个波的存在-修正的热波，具有分散性质的粘弹性波和横向粘弹性波。研究局限性/意义-仅在短时间内对边界上的表面位移分量进行了评估。独创性/值-本文提供了数值结果，以图形方式说明了该结果，以突出时间，源深度和源速度的不同值下，表面位移分量随距离的变化。

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