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Analytical aspects in strain gradient theory for chiral Cosserat thermoelastic materials within three Green-Naghdi models

机译:三个Green-Naghdi模型中手性Cosserat热弹性材料的应变梯度理论的分析方面

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摘要

This work is motivated by the recent interest in using strain gradient theory to model the chiral behavior of elastic materials. In this paper, we derive a linear strain gradient theory for Cosserat thermoelastic materials according to the three models (types I, II and III) of Green-Naghdi theory. Models II and III permit propagation of thermal waves at finite speeds, while model I coincides with the classical Fourier's law. The thermal field is influenced by the displacement and the microrotation fields and by some additional parameters that describe the chiral behavior. We prove the well-posedness for the three models and the asymptotic behavior for models I and III by the semigroup theory of linear operators.
机译:这项工作是受最近对使用应变梯度理论建模弹性材料的手性行为的兴趣所激发的。在本文中,我们根据Green-Naghdi理论的三种模型(I,II和III型)推导了Cosserat热弹性材料的线性应变梯度理论。模型II和III允许热波以有限的速度传播,而模型I符合经典的傅立叶定律。温度场受位移场和微旋转场以及描述手性行为的一些其他参数的影响。我们通过线性算子的半群理论证明了这三个模型的适定性以及模型I和III的渐近行为。

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