具有双稳态特性的复合材料结构粘弹性模型与变形机理研究

项目名称： 具有双稳态特性的复合材料结构粘弹性模型与变形机理研究

项目编号： No.51205355

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 机械工程学科

项目作者： 张征

作者单位： 浙江工业大学

项目金额： 25万元

中文摘要： 具有双稳态特性的复合材料结构(简称为双稳态结构)是一种新型的可伸展、可卷曲结构，具有轻质、力学性能优异和空间利用率高等特性，应用前景广阔。目前有关碳纤维/环氧树脂、玻璃纤维/聚丙烯等以非金属聚合物为基体的双稳态结构的理论模型以假定基体 (环氧树脂、聚丙烯等)线弹性为主，忽略了基体材料固有的粘弹性特性，理论描述不准确致使与实验结果偏差较大，本项目提出一种能真实反映由机械载荷驱动、智能材料驱动(如压电片或者形状记忆合金等)的双稳态结构变形的基体粘弹性理论模型，采用数值模拟与实验相结合的方法，建立求解双稳态结构的计算方法和模型，对由不同材料制备的层合型复合材料在制备固化、加载过程中的双稳态特性进行研究，发现其双稳态特性机理，分析不同参数、环境因素(温度、湿度)对双稳态构型的影响。 通过对双稳态结构粘弹性理论模型和变形机理的研究，为设计和制备双稳态结构提供理论指导和技术依据。

中文关键词： 复合材料结构；层合壳；粘弹性；双稳态特性；反对称/非对称铺设

英文摘要： As a novel composite structure with bistable characteristics (bistable structure for short),i.e.,which can be extended and roll-up, has the advantage of light，superior mechanical properties and higher utilization ratio in space，can find its application in various fields. However, due to the polymer matrix material(epoxy resin or polypropylene etc.) of the bistable structure made from carbon/epoxy，glass/polypropylene is assumed that elastic, and ignore its viscoelastic property,the theoretical model can not really match with the experimental result. A viscoelastic theoretical model on the bistable structures' deformation behaviour with respect to the external actuators,such as mechanical loads and smart material driving (piezoelectric patches or SMAs, etc.) was extablished in this project. A calculation method and a computational model with both numerical simulations and experimental tests were established to investigate the bistable deformation mechanism. The bistable characteristics of the laminated composites made from different materials were tested under curing and loading processes so as to explore the main factors and their correlations among the shape changes. The effects of the different parameters and environmental factors(such as temperature and moisture) were studied as well. Through the study of th

英文关键词： Composite Structures；Laminated Shell；Viscoelasticity；Bistable Characteristics；Antisymmetric/Unsymmetric Layup