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首页> 外文期刊>International Journal of Plasticity >Thermo-mechanical coupling of a viscoelastic-viscoplastic model for thermoplastic polymers: Thermodynamical derivation and experimental assessment
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Thermo-mechanical coupling of a viscoelastic-viscoplastic model for thermoplastic polymers: Thermodynamical derivation and experimental assessment

机译:热塑性聚合物粘弹性粘塑模型的热机械耦合:热力学推导和实验评估

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摘要

In this paper, a new constitutive model is proposed for the behavior of thermoplastic polymers under non-isothermal conditions. The model couples linear viscoelasticity, viscoplasticity and thermal effects. It is formulated within the framework of irreversible thermodynamics. The total strain is the sum of viscoelastic, viscoplastic and thermal strains. General hereditary integrals describe the thermo-viscoelastic response. The viscoplastic part accounts for both isotropic and kinematic hardenings. The stress-strain response and the material self-heating are predicted and compared to experimental data on Polyamide 66 (PA66) and Polypropylene (PP). Good agreement between the numerical simulations and experimental data was obtained for the two materials.
机译:在本文中,提出了一种新的本结构型模型,用于在非等温条件下的热塑性聚合物的行为。 该模型致力于线性粘弹性,粘胶塑性和热效应。 它在不可逆热力学的框架内配制。 总菌株是粘弹性,粘塑料和热菌株的总和。 一般遗传的积分描述了热粘弹性的反应。 粘胶塑料部分占各向同性和运动的硬化。 预测应力 - 应变反应和材料自加热,与聚酰胺66(PA66)和聚丙烯(PP)的实验数据进行比较。 为两种材料获得了数值模拟和实验数据之间的良好一致性。

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