The article presents some results of the bending of sinusoidal corrugated metal plate under the boundary conditions 4 hinge edge by analytic methods. Sinusoidal corrugated metal plates are converted to orthotropic flat plates based on equivalent membrane stiffness and bending stiffness. Numerical results of deflections calculated on flat plates are compared and evaluated with the ANSYS results. | Nguyễn Đình Ngọc và Đtg Tạp chí KHOA HỌC & CÔNG NGHỆ 139(09): 63 - 67 ANALYSIS OF BENDING OF CORRUGATED METAL SHEET Nguyen Dinh Ngoc*, Nguyen Thi Hue College of Technology - TNU SUMMARY The article presents some results of the bending of sinusoidal corrugated metal plate under the boundary conditions 4 hinge edge by analytic methods. Sinusoidal corrugated metal plates are converted to orthotropic flat plates based on equivalent membrane stiffness and bending stiffness. Numerical results of deflections calculated on flat plates are compared and evaluated with the ANSYS results. Keywords: Corrugated plate, deflection, equivalent orthotropic plate, ANSYS, FEM INTRODUCTION* Corrugated plates are found in all branches of engineering practise. The corrugations reinforce the plates and improve their strength to weight ratio. Because of these superiorities, corrugated plates are popular in decking, roofing and sandwich plate core structures. Corrugated plates of wave form made of isotropic materials were considered as flat orthotropic plates with corresponding orthotropic constants determined by the Syedel’s technique [3]. This approach was presented in [1-2]. In these papers, the authors converted corrugated plate into equivalent flat plates by means of only bending stiffness but without membrane stiffness. The purpose of the present paper is to calculate deflections of corrugated plates on its model equivalent orthotropic plate including both equivalent membrane stiffness and bending stiffness. These equivalent stiffness bases on Briassouli’s technique [4]. SINUSOIDAL CORRUGATED PLATE AND ITS EQUIVALENT FLAT PLATE Consider a rectangular symmetrical corrugated plate in the form of a sine wave (). The plate is subjected to uniform contribution load in the z direction. Suppose the portion of cross-section line of the corrugated plate in the plane (x, z) has the form of a sine wave. z H sin x l Where: H – wave amplitude; l- half .
