Limit load analysis and imperfection sensitivity of heated or compressed FGM beams on nonlinear softening elastic foundation

被引:23
作者
Babaei, Hadi [1 ]
Kiani, Yaser [2 ]
Eslami, Mohammad Reza [3 ]
机构
[1] Islamic Azad Univ, Dept Mech Engn, South Tehran Branch, Tehran, Iran
[2] Shahrekord Univ, Fac Engn, Shahrekord, Iran
[3] Amirkabir Univ Technol, Mech Engn Dept, Tehran, Iran
关键词
Imperfection sensitivity; FGM beam; compressive load; post-buckling; nonlinear elastic foundation; two-step perturbation method; THERMAL POSTBUCKLING BEHAVIOR; PHYSICAL NEUTRAL SURFACE; VIBRATION ANALYSIS; STABILITY ANALYSIS; TIMOSHENKO BEAMS; PLATES; COLUMNS; ARCHES; TUBES;
D O I
10.1080/15397734.2020.1717343
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
Analysis of nonlinear response of thick FGM beams subjected to either thermal or mechanical load is performed. Beam is in contact with a three-parameter elastic foundation. Nonlinear component of the foundation may be of the hardening or softening type. Equilibrium equations of the clamped beam are obtained within the framework of von Karman assumptions and third-order shear deformation theory and solved using the two-step perturbation technique. It is shown that when the FGM beam is in contact with a sufficiently soft foundation, the post-buckling path of the heated/compressed FGM beam is unstable and therefore, the structure is imperfection sensitive. Communicated by Chandrika Prakash Vyasarayani
引用
收藏
页码:371 / 394
页数:24
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