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首页> 外文期刊>International Journal of Plasticity >A generalized coupled viscoplastic-viscodamage-viscohealing theory for glassy polymers
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A generalized coupled viscoplastic-viscodamage-viscohealing theory for glassy polymers

机译：玻璃态聚合物的广义粘塑性-黏破坏-黏愈合理论

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A thermodynamic consistent, small-strain, non-unified model is developed to capture the irregular rate dependency included in the strain controlled inelastic responses of polymers at the glassy state. The model is considered as a generalized Frederick-Armstrong-Philips-Chaboche (FAPC) theory proposed by Voyiadjis and Basuroychowdhury (1998) and Voyiadjis and Abu Al-Rub (2003) which is based on a von Mises and Chaboche isotropic hardening type viscoplasticity formulation. Using the proposed model, different experimental results are simulated and the range of viscoplastic related material constants are obtained through a parametric study. The thermodynamic framework is used to incorporate the effect of coupling between viscodamage and viscohealing phenomena into the inelastic deformation of glassy polymers. This coupling effect is crucial for polymeric based self healing systems in which different damage mechanisms are active and the efficiency of the healing processes are highly dependent on the damage. The computational aspect for general coupled inelastic-damage-healing processes together with the required solution algorithms are elaborated and the inelastic-damage-healing response of a polymeric based self-healing system is simulated. The proposed viscoplasticity theory constitutes a physically consistent approach to model the irregular mechanical responses of glassy polymers and the viscodamage model provides an exquisite predicting tool to evaluate the ductile damage associated with the large inelastic deformation and low cycle fatigue in polymeric based material systems. In conclusion, a well structured viscohealing theory is formulated for polymeric based self healing systems.
机译：建立了一个热力学一致的小应变非统一模型，以捕获玻璃态聚合物受应变控制的非弹性响应中包括的不规则速率依赖性。该模型被认为是由Voyiadjis和Basuroychowdhury（1998）以及Voyiadjis和Abu Al-Rub（2003）提出的广义Frederick-Armstrong-Philips-Chaboche（FAPC）理论，该理论基于von Mises和Chaboche各向同性硬化型粘塑性公式。使用提出的模型，模拟了不同的实验结果，并通过参数研究获得了粘塑性相关材料常数的范围。使用热力学框架将粘滞损伤和粘滞现象之间的耦合效应纳入玻璃状聚合物的非弹性形变中。这种耦合效应对于基于聚合物的自我修复系统至关重要，在该系统中，不同的损伤机制是活跃的，并且修复过程的效率高度依赖于损伤。阐述了一般耦合非弹性损伤修复过程的计算方面以及所需的求解算法，并模拟了基于聚合物的自修复系统的非弹性损伤修复响应。拟议的粘塑性理论构成了一种物理一致的方法，可以对玻璃态聚合物的不规则机械响应进行建模，而粘滞损伤模型提供了一种精美的预测工具，可评估与聚合物基材料系统中的大无弹性变形和低周疲劳相关的延性破坏。总之，针对聚合物基的自愈系统制定了结构良好的粘性修复理论。

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