Mathematical significance of strain rate and temperature rate on heat conduction in thermoelastic material due to line heat source

IF 2.6 3区 工程技术 Q2 MECHANICS
Robinderpal Singh, Santwana Mukhopadhyay
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引用次数: 0

Abstract

Abstract The primary purpose of the present article is to investigate the effect of strain rate and temperature rate factors on a homogeneous, unbounded isotropic elastic medium originating due to continuous line heat source. This study is based on the modified Green-Lindsay Model (MGL) theory proposed by Yu et al. (2018). This model eliminates the discontinuous nature of the displacement field reported under the temperature-rate-dependent thermoelasticity theory (GL) established by Green and Lindsay. The present work obtains the analytical solution for the distributions of stress components, temperature and displacement through the potential function approach accompanied by the Laplace transform method. The inverse Laplace transformation is performed by using short-time approximation method to find the approximated analytical solution of the problem in space-time domain. A detailed analysis of solution is discussed for MGL model and compared to the results predicted by other existing generalized thermoelastic models. The effect of strain-rate and temperature-rate-terms is acknowledged explicitly in mathematical formulation and other significant effects are notified. However, this new model predicts the infinite speed of disturbance analogous to classical theory.
线热源下热弹性材料应变速率和温度率对热传导的数学意义
摘要本文的主要目的是研究应变率和温度率因素对由连续线热源引起的均匀无界各向同性弹性介质的影响。本研究基于Yu et al.(2018)提出的修正Green-Lindsay模型(MGL)理论。该模型消除了Green和Lindsay建立的温度速率相关热弹性理论(GL)所报道的位移场的不连续性质。本文采用势函数法结合拉普拉斯变换方法,得到了应力分量、温度和位移分布的解析解。利用短时逼近法进行拉普拉斯逆变换,求出问题在空时域的近似解析解。对MGL模型的解进行了详细的分析,并与其他已有的广义热弹性模型的预测结果进行了比较。在数学公式中明确承认应变率和温度率项的影响,并通报了其他重要影响。然而,这个新模型与经典理论类似,预测了扰动的无限速度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Thermal Stresses
Journal of Thermal Stresses 工程技术-力学
CiteScore
5.20
自引率
7.10%
发文量
58
审稿时长
3 months
期刊介绍: The first international journal devoted exclusively to the subject, Journal of Thermal Stresses publishes refereed articles on the theoretical and industrial applications of thermal stresses. Intended as a forum for those engaged in analytic as well as experimental research, this monthly journal includes papers on mathematical and practical applications. Emphasis is placed on new developments in thermoelasticity, thermoplasticity, and theory and applications of thermal stresses. Papers on experimental methods and on numerical methods, including finite element methods, are also published.
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