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首页> 外文期刊>Journal of thermal stresses >Mechanical and thermal couplings in helical strands*
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Mechanical and thermal couplings in helical strands*

机译：螺旋绞线中的机械和热联轴器*

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摘要

A generalized Timoshenko rod model is developed for helical strands and helically reinforced cylinders. The thermomechanical constitutive law has five effective elastic moduli, and two thermal coefficients, which can be obtained with the finite element method, or partly from analytic solutions. The model predicts nonclassical bending and thermoelastic behavior of helical strands. First, bending-shearing coupling is explicitly captured, which leads to non-planar bending under a transverse shear force, or a bending moment. Second, torsion and thermal expansion are coupled due to structural chirality. The dispersion relation of harmonic thermoelastic waves is governed by four non-dimensional parameters: two thermoelastic coupling constants, one chirality parameter and the Fourier number. The quasi-longitudinal and the quasi-torsional waves ("quasi" meaning the longitudinal mode is always coupled with a small torsional motion, and vice versa, due to chirality) are dispersive and damped, and dependent on temperature. The adiabatic-isothermal transition of the wave propagation is determined by the Fourier number.
机译：广义Timoshenko棒模型是为螺旋股和螺旋增强缸开发的。热机械本构关系具有五种有效的弹性模和两种热系数，其可以用有限元方法，或部分来自分析溶液获得。该模型预测了螺旋股的非生物弯曲和热弹性行为。首先，明确地捕获弯曲剪切耦合，这导致在横向剪切力下的非平面弯曲，或弯矩。第二，扭转和热膨胀由于结构性手性而耦合。谐波热弹性波的色散关系由四个非尺寸参数控制：两个热弹性耦合常数，一个手性参数和傅立叶号。准纵向和准扭转波（“准扭转”（“准扭转）纵向模式总是与小扭转运动耦合，反之亦然是手性的，并且依赖于温度并取决于温度。波传播的绝热 - 等温转换由傅立叶号确定。

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