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首页> 外文期刊>International Journal of Plasticity >A three-dimensional finite-strain phenomenological model for shape-memory polymers: Formulation, numerical simulations, and comparison with experimental data
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A three-dimensional finite-strain phenomenological model for shape-memory polymers: Formulation, numerical simulations, and comparison with experimental data

机译：形状记忆聚合物的三维有限应变现象学模型：配方，数值模拟和与实验数据的比较

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摘要

Shape-memory polymers (SMPs) represent a class of smart materials able to store a temporary shape and to recover the original shape upon an external stimulus, such as temperature. The present paper proposes a three-dimensional finite-strain phenomenological model for thermo-responsive SMPs, which distinguishes between two material phases presenting different properties and is based on a rule of mixtures. The proposed model is motivated by the earlier work of Reese et al. (2010) and it considers several significant material features that had not been addressed in previous phenomenological approaches. Specifically, the model reproduces both heating-stretching-cooling and cold drawing shape-fixing procedures and it takes into account the non-ideal behavior of realistic SMPs (i.e. imperfect shape-fixing and incomplete shape-recovery). Several numerical tests are reported to assess model performances, from simple uniaxial and biaxial tests to complex simulations of biomedical devices. Comparisons with experimental data taken from the literature are also provided to validate the model. The proposed improvements increase the model applicability over a wide range of polymer types and operating conditions. (C) 2016 Elsevier Ltd. All rights reserved.
机译：形状记忆聚合物（SMP）代表一类智能材料，能够存储临时形状并在外部刺激（例如温度）刺激下恢复原始形状。本文提出了一种热响应性SMP的三维有限应变现象学模型，该模型可以区分表现出不同特性的两种材料相，并且基于混合规则。提出的模型是由Reese等人的早期工作所激发的。 （2010年），它考虑了以前的现象学方法未解决的几个重要的物质特征。具体而言，该模型同时复制了加热，拉伸，冷却和冷拔形状固定程序，并考虑了实际SMP的非理想行为（即不完美的形状固定和不完全的形状恢复）。从简单的单轴和双轴测试到生物医学设备的复杂模拟，已经报道了几种数值测试来评估模型性能。还提供了与来自文献的实验数据的比较，以验证该模型。所提出的改进提高了模型在各种聚合物类型和操作条件下的适用性。 （C）2016 Elsevier Ltd.保留所有权利。

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