GFRP补片内SMA铺设构型对修理层合板热振动特性的影响
Effect of SMA laying configuration in GFRP patch on thermal vibration characteristics of repair laminate
崔开心 1谢昊航 2任鹏 1卢翔2
作者信息
- 1. 中国民航大学 航空工程学院,天津 300300
- 2. 中国民航大学 交通科学与工程学院,天津 300300
- 折叠
摘要
在复合材料中加入形状记忆合金(SMA)制成的纤维增强材料具有高强度、高阻尼与良好的自修复性等优点,可明显提高修理结构刚度及抗剥离性.为了探究热环境下玻璃纤维补片内嵌不同铺设数量与方式的SMA修理板的振动特性,基于Liang-Rogers的SMA本构模型编制用户自定义材料子程序(UMAT),实现有限元精确求解.对比传统修理板与本文制备的SMA修理板的振型、固有频率及阻尼比变化情况,探究不同温度下SMA铺设构型对双面贴补修理玻璃纤维层合板振动特性的影响.实验与仿真结果表明:相较于单线型(D)与垂直交叉型(C),斜铺交叉型(X)SMA修理板前三阶振型更接近传统修理板(Q0),且振型与嵌入的SMA数量无关.SMA相变时,内嵌SMA使修理板前二阶固有频率上升且上升率与SMA数量呈正相关,与SMA铺设方式关系如下:C型＞D型＞X型.内嵌SMA使修理板耗能能力及阻尼性优于Q0 板,与SMA数量呈正相关,与SMA铺设方式关系如下:X型＞C型＞D型.本文研究的铺设构型中,X24 型修理效果最优,其一、二阶固有频率最高可恢复至Q0 板的 108.47%与 112.26%,阻尼比相较于Q0 板增大了 5.19倍.该工作可以为现有传统复合材料修理向智能复合材料修理技术转变提供参考.
Abstract
Fiber reinforced materials made by adding shape memory alloy(SMA)to composite materials have the advantages of high strength,high damping and good self-repair,which can significantly improve the rigidity and peel resistance of repair structures.In order to explore the vibration characteristics of SMA repair plates with different laying quantities and methods embedded in glass fiber patches under thermal environment,a user-defined material subprogram(UMAT)was developed based on Liang-Rogers'SMA constitutive model to achieve accurate finite element solving.The changes of mode shape,natural frequency and damping ratio of traditional repair plate and SMA repair plate prepared in this paper were compared,and the influence of SMA laying con-figuration on the vibration characteristics of double-sided patch repair fiberglass laminate was explored at different temperatures.Experimental and simulation results show that compared with single-line(D)and vertical cross(C),the first three-order mode shape of the diagonal cross(X)SMA repair plate is closer to the traditional repair plate(Q0),and the mode shape is independent of the number of embedded SMAs.When the SMA phase changes,the embedded SMA increases the natural frequency of the first second order of the repair plate,and the rise rate is positively correlated with the number of SMA,which is related to the SMA laying mode as follows:C-type＞D-type＞X-type.The embedded SMA makes the energy dissipation capacity and damping of the repair board better than that of the Q0 board,which is positively correlated with the number of SMA,and the relationship with the SMA laying method is as follows:X-type＞C-type＞D-type.In the laying configuration studied in this paper,the X24 type has the best repair effect,and its natural frequency of the first and second orders can be restored to 108.47%and 112.26%of the Q0 plate,and the damping ratio is 5.19 times higher than that of the Q0 plate.This work can provide a reference for the technical transformation of existing traditional composite repair to intelligent composite material repair.
关键词
SMA/编织玻璃纤维复合材料/振动特性/双面贴补修理/智能材料Key words
SMA/braided fiberglass composite/vibration characteristics/double-sided patch repair/smart ma-terials引用本文复制引用
基金项目
国家自然科学基金(U2033209)
天津市研究生科研创新一般专项(2022SKY158)
中央高校自然科学重点项目(XJ2023001601)
出版年
2024
NETL
NSTL
万方数据