Buckling and post-buckling of FRC beams in hydrothermal environment using a generalized high-order shear deformation zig-zag beam theory
In this paper, hydrothermal buckling and post-buckling of fiber-reinforced composite (FRC) beams resting on two-parameter elastic foundations are analyzed using a generalized high-order zig-zag beam theory.The proposed zig-zag beam model satisfies the stress boundary conditions on upper and lower surfaces and C0 continuity requirement for axial displacement shape functions at the layer interfaces, which is consistent with the reality that deformation is continuous but strain is discontinuous at the layer interfaces.The material property is assumed to be humidity-and temperature-dependent and the in-plane boundary conditions supposed immovable.The existence of a classical critical buckling bifurcation load under different laying patterns and different boundary conditions is discussed.A two-step perturbation method is employed to obtain the analytical solutions of the critical thermal buckling loads and post-buckling behaviors with different boundary conditions and laying methods.Influence of length-to-depth ratio, fiber angles, laying methods, supported boundaries and hydrothermal environment conditions are investigated.
Zig-zag displacement Buckling Postbuckling Two-step perturbation
Q.Jin Y.Ren
Department of Engineering Mechanics, College of Mechanical and Vehicle Engineering, Hunan University Changsha 410082, China
国际会议
Eighth Symposium on the Mechanics of Slender Structures(Moss 2019)(第八届国际细长结构力学论坛)
上海
英文
35-36
2019-05-24（万方平台首次上网日期，不代表论文的发表时间）