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Strain gradient theory of chiral Cosserat thermoelasticity without energy dissipation

机译:手征Cosserat热弹性的应变梯度理论,无能量耗散

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摘要

In this paper, we use the Green–Naghdi theory of thermomechanics of continua to derive a linear strain gradient theory of Cosserat thermoelastic bodies. The theory is capable of predicting a finite speed of heat propagation and leads to a symmetric conductivity tensor. The constitutive equations for isotropic chiral thermoelastic materials are presented. In this case, in contrast with the classical Cosserat thermoelasticity, a thermal field produces a microrotation of the particles. The thermal field is influenced by the displacement and microrotation fields even in the equilibrium theory. Existence and uniqueness results are established. The theory is used to study the effects of a concentrated heat source in an unbounded homogeneous and isotropic chiral solid.
机译:在本文中,我们使用连续体热力学的Green-Naghdi理论推导Cosserat热弹性体的线性应变梯度理论。该理论能够预测有限的热传播速度,并导致对称的电导率张量。提出了各向同性手性热弹性材料的本构方程。在这种情况下,与经典的Cosserat热弹性相反,热场使颗粒微旋转。即使在平衡理论中,热场也受位移场和微旋转场的影响。建立了存在性和唯一性结果。该理论用于研究集中热源在无界均质和各向同性手性固体中的作用。

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