Internal heat sources in large strain thermo-elasto-plasticity – theory and finite element simulations

B. Wcisło, M. Mucha, J. Pamin
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Abstract

The paper deals with theoretical description and numerical simulations of internal sources of heating/cooling in large strain thermo-elasticity and thermo-elasto-plasticity. The attention is paid to metallic materials which undergo cooling in the elastic range and heating during plastic yielding. Theoretical description can be derived from thermodynamic considerations based on the first and second laws of thermodynamics and assumed forms of the Helmholtz free energy. Numerical simulations within the Finite Element Method are performed for a uniaxial tension test and elongation of a dogbone-shape sample. For the latter specimen, a comparison with experimental results is performed, and good agreement is obtained.
大应变热弹性塑性中的内部热源--理论和有限元模拟
本文论述了大应变热弹性和热弹性塑性内部加热/冷却源的理论描述和数值模拟。本文关注的是在弹性范围内发生冷却和在塑性屈服过程中发生加热的金属材料。理论描述可从基于热力学第一和第二定律的热力学考虑和假定形式的亥姆霍兹自由能中得出。利用有限元法对单轴拉伸试验和狗骨形样品的伸长进行了数值模拟。对于后一种试样,与实验结果进行了比较,结果一致。
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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