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首页> 外文期刊>Smart Materials & Structures >Implementation of a finite element analysis procedure for structural analysis of shape memory behaviour of fibre reinforced shape memory polymer composites
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Implementation of a finite element analysis procedure for structural analysis of shape memory behaviour of fibre reinforced shape memory polymer composites

机译：纤维增强形状记忆聚合物复合材料形状记忆行为结构分析有限元分析程序的实施

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摘要

Shape memory polymers (SMPs) offer a unique ability to undergo a substantial shape deformation and subsequently recover the original shape when exposed to a particular external stimulus. Comparatively low mechanical properties being the major drawback for extended use of SMPs in engineering applications. However the inclusion of reinforcing fibres in to SMPs improves mechanical properties significantly while retaining intrinsic shape memory effects. The implementation of shape memory polymer composites (SMPCs) in any engineering application is a unique task which requires profound materials and design optimization. However currently available analytical tools have critical limitations to undertake accurate analysis/simulations of SMPC structures and slower derestrict transformation of breakthrough research outcomes to real-life applications. Many finite element (FE) models have been presented. But majority of them require a complicated user-subroutines to integrate with standard FE software packages. Furthermore, those subroutines are problem specific and difficult to use for a wider range of SMPC materials and related structures. This paper presents a FE simulation technique to model the thermomechanical behaviour of the SMPCs using commercial FE software ABAQUS. Proposed technique incorporates material time-dependent viscoelastic behaviour. The ability of the proposed technique to predict the shape fixity and shape recovery was evaluated by experimental data acquired by a bending of a SMPC cantilever beam. The excellent correlation between the experimental and FE simulation results has confirmed the robustness of the proposed technique.
机译：形状记忆聚合物（SMPS）提供了独特的能力，经历了大量形状变形，随后在暴露于特定的外部刺激时恢复原始形状。相对低的机械性能是在工程应用中扩展SMPS的主要缺点。然而，将增强纤维纳入SMPS，显着提高了机械性能，同时保持内在形状记忆效应。在任何工程应用中的形状记忆聚合物复合材料（SMPC）的实施是需要深刻材料和设计优化的独特任务。然而，目前可用的分析工具具有对SMPC结构进行准确分析/模拟的关键限制，并且突破性研究成果的越来越越来越多的转变。已经提出了许多有限元（FE）模型。但其中大多数需要一个复杂的用户子程序与标准FE软件包集成。此外，这些子程序是特定的问题，并且对于更广泛的SMPC材料和相关结构难以使用问题。本文介绍了使用商业FE软件ABAQUS模拟SMPC的热机械行为的FE模拟技术。提出的技术包括材料时间依赖性粘弹性行为。所提出的技术预测形状固定性和形状恢复的能力通过由SMPC悬臂梁的弯曲获取的实验数据来评估。实验和FE模拟结果之间的优异相关性证实了该技术的鲁棒性。

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