基于应变能损耗的形状记忆合金丝内植复合材料的振动控制

项目名称： 基于应变能损耗的形状记忆合金丝内植复合材料的振动控制

项目编号： No.51303131

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 一般工业技术

项目作者： 徐磊

作者单位： 天津工业大学

项目金额： 25万元

中文摘要： 形状记忆合金丝作为结构增强以及耗能材料，常用于结构的振动控制。尽管高性能纤维增强树脂基复合材料阻尼比较大，但其存在内部阻尼分布不均、振动扰动较大等缺陷，因此需要将形状记忆合金丝植入复合材料结构内部以改善其振动性能。本项目制备形状记忆合金细丝作为纱线芯层，高性能纤维作为纱线外层的复合纱线，从复合材料细观结构的动力学性能入手，建立关于复合材料单胞的纤维-纱线-织物的多尺度有限元模型；利用应变能损耗和有限元仿真技术，求出单胞的等效阻尼系数。找出纱线、织物结构与复合材料结构振动性能的关系，并通过复合材料的自由振动以及风振实验，对模型进行修正，为形状记忆合金内植复合材料减振结构的设计提供算法支持。

中文关键词： 形状记忆合金；织物复合材料；应变能损耗；振动控制；

英文摘要： As a structural reinforcement and energy-intensive materials, shape memory alloy (SMA) wires are commonly used in structural vibration control. Composite structures made of high performance fiber reinforced thermo-setting composites. Although the damping of the composite is relatively large, the presence of the uneven distribution of internal damping and large vibration disturbance which needs the implantation of the SMA wires to obtain a proper vibration control. In this project, an composite yarn are made in combination of a SMA wire core and high performance fiber outer layer. A finite element model of composite unit-cell which includes a multi-scale structure of fiber-yarn-fabric is established based on the strain energy loss theory and finite element simulation technique. The relationship between the yarn architectures and the vibration properties of the composite structures is obtained. After modified by free vibration and wind-induced vibration tests, this relational model can support for the design of the shape memory alloy implanted composites damping structures.

英文关键词： shape menory alloy；fabric reinforced composite；strain energy loss；vibration control；