Fracture behavior of Shape Memory Polymers (SMPs) and their self-healing property is one of the up-to-date subjects through the literature, where only a few researches have been conducted. Nowadays, because of the exceptional properties of SMPs and their implementation in 4D printing, they are most taken into attention. In this study, thermomechanical coupling effect on 3D fracture analysis of SMPs in large deformation regime has been investigated. Firstly, a thermo-visco-hyperelastic model is implemented to model the thermomechanical cycle of the SMP in the stress-free strain-recovery as well as the fixed-strain-stress-recovery processes. Motivated by fracture analysis and self-healing properties of SMPs, both 2D and 3D fracture analysis are conducted through various feasibility applications, such as flow control valve, pressure control valve, filtration and drug delivery capsule. Moreover, the ability of the analysis is shown through examining different parameters could affect the SMP response, such strain rate (or applied strain), temperature rate and memory recovery. Finally, the results show the ability of the numerical modeling in the aforesaid applications to design, analyze, and fabricate these applications.

形状记忆聚合物（SMP）的断裂行为及其自愈性能是文献中最新的主题之一，在文献中仅进行了很少的研究。如今，由于SMP的卓越性能及其在4D打印中的实现，因此备受关注。在这项研究中，研究了大变形状态下热力学耦合对SMPs 3D断裂分析的影响。首先，建立了热-粘-超弹性模型来模拟SMP在无应力应变恢复和固定应变应力恢复中的热机械循环。流程。借助SMP的断裂分析和自我修复特性，通过各种可行的应用程序（例如流量控制阀，压力控制阀，过滤和给药胶囊）进行2D和3D断裂分析。此外，通过检查不同的参数可能影响SMP响应（例如应变率（或施加的应变），温度率和内存恢复）来显示分析能力。最后，结果表明上述应用程序中的数值建模能够设计，分析和制造这些应用程序。