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基于高阶剪切变形理论梁的热屈曲和后屈曲分析 被引量:1
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作者 于旭光 申幸幸 郑宏 《石家庄铁道大学学报(自然科学版)》 2019年第1期7-12,共6页
基于高阶剪切变形理论,推导了轴向荷载与均匀热荷载作用下梁的平衡方程,并将3个非线性方程化简为2个关于横向挠度和转角的非线性积分—微分方程。对于所考虑的两端简支和两端固支边界条件,求解了梁的临界屈曲荷载和梁的后屈曲幅值,讨论... 基于高阶剪切变形理论,推导了轴向荷载与均匀热荷载作用下梁的平衡方程,并将3个非线性方程化简为2个关于横向挠度和转角的非线性积分—微分方程。对于所考虑的两端简支和两端固支边界条件,求解了梁的临界屈曲荷载和梁的后屈曲幅值,讨论了长细比对临界屈曲荷载的影响以及温度和荷载对梁后屈曲幅值的影响。研究结果表明,对于长细比较小的梁,剪切变形对临界屈曲载荷的影响十分明显;而当长细比较大时,与欧拉梁理论得出的结论非常接近。在温度和轴向荷载共同作用下,随着温度升高,梁的临界屈曲荷载值下降但梁中点挠度值升高。 展开更多
关键词 高阶剪切变形理论 轴向荷载 均匀热荷载 临界屈曲荷载 后屈曲幅值
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Analytical solution for functionally graded anisotropic cantilever beam under thermal and uniformly distributed load 被引量:6
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作者 HUANG De-jin DING Hao-jiang CHEN Wei-qiu 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2007年第9期1351-1355,共5页
The bending problem of a functionally graded anisotropic cantilever beam subjected to thermal and uniformly dis-tributed load is investigated,with material parameters being arbitrary functions of the thickness coordin... The bending problem of a functionally graded anisotropic cantilever beam subjected to thermal and uniformly dis-tributed load is investigated,with material parameters being arbitrary functions of the thickness coordinate. The heat conduction problem is treated as a 1D problem through the thickness. Based on the elementary formulations for plane stress problem,the stress function is assumed to be in the form of polynomial of the longitudinal coordinate variable,from which the stresses can be derived. The stress function is then determined completely with the compatibility equation and boundary conditions. A practical example is presented to show the application of the method. 展开更多
关键词 Functionally graded material (FGM) ANISOTROPIC Thermal stress Analytical solution Cantilever beam
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