3 April 2013 A constitutive theory for shape memory polymers: coupling of small and large deformation
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At high temperatures, SMPs share attributes like rubber and exhibit long-range reversibility. In contrast, at low temperatures they become very rigid and are susceptible to plastic, only small strains are allowable. But there relatively little literature has considered the unique small stain (rubber phase) and large stain (glass phase) coupling in SMPs when developing the constitutive modeling. In this work, we present a 3D constitutive model for shape memory polymers in both low temperature small strain regime and high temperature large strain regime. The theory is based on the work of Liu et al. [15]. Four steps of SMP’s thermomechanical loadings cycle are considered in the constitutive model completely. The linear elastic and hyperelastic effects of SMP in different temperatures are also fully accounted for in the proposed model by adopt the neo-Hookean model and the Generalized Hooke’s laws.
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Qiao Tan, Qiao Tan, Liwu Liu, Liwu Liu, Yanju Liu, Yanju Liu, Jinsong Leng, Jinsong Leng, Xiangqiao Yan, Xiangqiao Yan, Haifang Wang, Haifang Wang, "A constitutive theory for shape memory polymers: coupling of small and large deformation", Proc. SPIE 8689, Behavior and Mechanics of Multifunctional Materials and Composites 2013, 86890M (3 April 2013); doi: 10.1117/12.2009671; https://doi.org/10.1117/12.2009671

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