A nonlinear viscoelastic-viscoplastic model for adhesives
A nonlinear viscoelastic-viscoplastic model for adhesives
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DOI：
10.1007/s11043-020-09460-2
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发表时间：
2020-08-27
影响因子：
2.5
通讯作者：
Smith, Lloyd V.
中科院分区：
文献类型：
--
作者：
Chen, Yi;Smith, Lloyd V.
我们考虑胶粘剂的非线性粘弹-粘塑性行为。结合Schapery的非线性单积分模型和Perzyna的粘塑性模型，建立了一维非线性模型。采用von Mises屈服准则和非线性随动强化迭代求解粘塑性应变。采用牛顿迭代法求解粘弹-粘塑性组合模型，并将其转化为有限元模型。该模型进行了校准，使用蠕变恢复数据从散装胶粘剂和验证散装胶粘剂的循环行为。有限元模型的结果与实验蠕变和循环响应，包括恢复和永久应变后，负载删除。尽管粘塑性应变的贡献很小，但应变响应的粘塑性和粘弹性分量都需要描述粘合剂的蠕变和循环响应。
We consider the nonlinear viscoelastic-viscoplastic behavior of adhesives. We develop a one-dimensional nonlinear model by combining Schapery's nonlinear single integral model and Perzyna's viscoplastic model. The viscoplastic strain was solved iteratively using the von Mises yield criterion and nonlinear kinematic hardening. The combined viscoelastic-viscoplastic model was solved using Newton's iteration and implemented into a finite element model. The model was calibrated using creep-recovery data from bulk adhesives and verified from the cyclic behavior of the bulk adhesives. The finite element model results agreed with experimental creep and cyclic responses, including recoverable and permanent strain after load removal. Although the contribution of the viscoplastic strain was small, both viscoplastic and viscoelastic components of strain response were required to describe the adhesive creep and cyclic response.