静不定复合材料夹芯梁弹性屈曲载荷的近似解  

Approximate Solution of Elastic Buckling Load in Statically Indeterminate Composite Sandwich Beam

作　　者：吴晓 WU Xiao(School of Intelligent Building,Changde College,Changde,415000,China;College of Mechanical Engineering,Hunan University of Arts and Science,Changde 415000,China)

机构地区：[1]常德学院智能建筑学院,常德415000 [2]湖南文理学院机械工程学院,常德415000

出　　处：《湖南师范大学自然科学学报》2023年第5期153-158,共6页Journal of Natural Science of Hunan Normal University

基　　金：国家自然科学基金资助项目(52008164);湖南省教育厅项目(HNJG-2022-1365)。

摘　　要：利用能量法得到静不定夹芯梁剪切刚度表达式,构造静不定夹芯梁的挠度函数,进而得到静不定复合材料夹芯梁的弹性屈曲载荷近似解。相关试验证明了静不定夹芯梁剪切刚度表达式的计算精度的可靠性及实际工程的适用性。算例分析表明,静不定复合材料夹芯梁弹性屈曲载荷的计算应考虑剪切刚度的影响,否则会产生很大的计算误差。In this paper,the expression of shear stiffness in the statically indeterminate sandwich beam was obtained by the energy method,and the deflection function was constructed.Accordingly,an approximate solution of elastic buckling load in statically indeterminate composite sandwich beam was obtained.The test results show that the accuracy of the expression of shear stiffness in the statically indeterminate sandwich beam is reliable and can meet the needs of practical engineering.The examples show that the effect of shear stiffness should be taken into account in the calculation of elastic buckling load in the statically indeterminate composite sandwich beam,otherwise the calculation error will be very large.

关 键 词：静不定 夹层梁 弹性 屈曲载荷 剪切刚度 试验 

分 类 号：O342[理学—固体力学]