摘要
在复合材料中嵌入形状记忆合金制成的纤维增强材料具有高强度与自修复性等优点,可明显提高修理结构刚度及抗剥离性。基于一阶剪切变形理论(FSDT)与Hamilton原理,推导了SMA复合材料的本构方程与振动控制方程。使用ABAQUS软件建立内嵌多种铺设构型的SMA补片单面贴补修理层合板模型,通过数值仿真与试验验证,探究不同温度下SMA铺设构型对修理玻璃纤维层合板振动特性的影响。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修理板的前三阶振型更接近传统修理板(Q0)前三阶振型,其修理结构的整体刚度及抗剥离性最优。高温作用下,四种构型修理板的固有频率下降率排序为Q0>D6>C6>X6,即内嵌不同铺设方式的SMA可不同程度减小温度对固有频率产生的影响,其中X6型下降率最低,可达1.24%。SMA铺设数量与IQR值、固有频率的下降率关系为6根>12根>24根,即随板中内嵌SMA数量增加,热效应对固有频率影响减小,其中X24型修理结构热稳定性与修理效果最好。SMA修理板的高阶固有频率对温度更敏感,更易受温度影响而改变。
Fiber reinforced materials made of shape memory alloys embedded in composite materials have the advantages of high strength and self-repair,which can significantly improve the rigidity and peel resistance of the repair structure.Based on the first-order shear deformation theory(FSDT)and Hamilton’s principle,the constitutive equation and vibration control equation of SMA composites are derived.The single-sided repair laminate model of SMA patch embedded with multiple laying configurations was established by ABAQUS software,and the influence of SMA laying configuration on the vibration characteristics of repair glass fiber laminate at different temperatures was explored through numerical simulation and experimental verification.The results show that compared with the single-line type(D)and vertical cross type(C),the first three mode shapes of the diagonal cross type(X)SMA repair plate are closer to the traditional repair plate(Q0),and the overall stiffness and peel resistance of the repair structure are the best.The natural frequency drop rate of the repair board of the four configurations under the action of high temperature has the following relationship:Q0>D6>C6>X6,that is,the SMA embedded with different laying methods can reduce the influence of temperature on the natural frequency to varying degrees,of which the X6-type has the lowest drop rate,up to 1.24%.The number of SMA laying has the following relationship with IQR value and natural frequency decline rate:6>12>24,with the increase of the number of SMA embedded in the board,the influence of thermal effect on the natural frequency decreases,and the thermal stability and repair effect of X24 repair structure are the best.The high-order natural frequencies of SMA repair boards are more sensitive to temperature and more susceptible to temperature changes in their natural frequencies.
作者
崔开心
卢翔
谢昊航
刘兴龙
CUI Kaixin;LU Xiang;XIE Haohang;LIU Xinglong(College of Aerospace Engineering,Civil Aviation University of China,Tianjin 300300,China;College of Transportation Science and Engineering,Civil Aviation University of China,Tianjin 300300,China)
出处
《复合材料科学与工程》
CAS
北大核心
2024年第10期53-64,共12页
Composites Science and Engineering
基金
国家自然科学基金(U2033209)
天津市研究生科研创新项目-一般专项(2022SKY158)
自然科学重点项目(XJ2023001601)。
关键词
十字平纹编织玻璃纤维复合材料
形状记忆合金
单面贴补修理
振动特性
热环境
cross-weave fiberglass composite
shape memory alloy
single-sided patch repair
vibration characteristics
thermal environment
