Ordinary state-based peridynamics for thermoviscoelastic deformation
Ordinary state-based peridynamics for thermoviscoelastic deformation
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DOI：
10.1016/j.engfracmech.2017.02.011
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发表时间：
2017-02
影响因子：
5.4
通讯作者：
E. Madenci;S. Oterkus
中科院分区：
文献类型：
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作者：
E. Madenci;S. Oterkus
本研究提出了在机械和热载荷作用下粘弹性变形的常态周向（PD）本构关系。粘性材料的行为是仿照Prony级数。本构常数与经典的历史积分模型相同，并且它们也容易从松弛试验中获得。状态变量是共轭的PD弹性拉伸措施，因此，他们是一致的弹性变形的运动学假设。PD粘弹性变形分析成功地捕捉到材料的松弛行为。数值结果首先涉及验证问题，随后涉及具有粘弹性粘合剂的双搭接接头，其中失效会发生并发展。
This study presents the ordinary state-based peridynamic (PD) constitutive relations for viscoelastic deformation under mechanical and thermal loads. The behavior of the viscous material is modeled in terms of Prony series. The constitutive constants are the same as those of the classical history-integral model, and they are also readily available from relaxation tests. The state variables are conjugate to the PD elastic stretch measures; hence, they are consistent with the kinematic assumptions of the elastic deformation. The PD viscoelastic deformation analysis successfully captures the relaxation behavior of the material. The numerical results concern first the verification problems, and subsequently, a double-lap joint with a viscoelastic adhesive where failure nucleates and grows.