摘要
透波罩与飞行器本体往往通过胶黏+辅助连接的方式进行连接,在实际工程应用中,通常将线弹性本构作为胶黏剂的本构模型进行分析,该方法难以对相关黏接结构的力学行为进行准确模拟。基于此,采取常用的双线性内聚力本构模型,通过胶黏剂实际性能的测试结果对本构模型进行校正,采用平板模拟实际黏接结构的性能试验进一步验证复杂受力环境下模型的有效性,并将验证后的本构模型用于分析实际整机级透波罩的黏接强度,并与实际试验结果进行对比,验证双线性内聚力本构模型的计算精度,为类似结构黏接强度的准确预测提供有效途径。
The radome and aircraft are often connected by adhesive bonding and auxiliary connection.With the development of aircraft technologies,higher requirements are raised by severe thermo-mechanical environments for the properties of bonding structure during flight.In practical engineering applications,the linear elastic constitutive model is usually used as the constitutive model of adhesives for analysis.The calculation results often greatly deviate from the actual bearing capacity,and it is difficult to accurately simulate the mechanical behavior of the related bonding structures.The frequently used bilinear cohesive constitutive model was employed in this paper.First,the constitutive model was calibrated by the test results of the actual performance of the adhesive.Then,the effectiveness of the model under a complex stress environment was further verified by the performance test of the actual bonding structure at the level of the surface plate.The verified constitutive model was used to analyze the bonding strength for aircraft-level radome,and the results were compared with the actual test results.The calculation accuracy of the model was verified,which provided an effective way for accurately predicting the bonding strength of similar structures in the future.
作者
侯保江
王姣
邢誉峰
张飞
李焱喜
HOU Baojiang;WANG Jiao;XING Yufeng;ZHANG Fei;LI Yanxi(School of Aeronautic Science and Engineering,Beihang University,Beijing 100191,China;Beijing Institute of Space Long March Vehicle,Beijing 100076,China)
出处
《北京航空航天大学学报》
北大核心
2025年第6期1916-1925,共10页
Journal of Beijing University of Aeronautics and Astronautics
关键词
内聚力
双线性
透波罩
黏接强度
数值仿真
cohesion
bilinear
radome
bonding strength
numerical simulation
