Numerical Study on Effect of Dent Dimensions on Buckling Resistance of Thin Stainless Steel Cylindrical Shell Under Lateral Pressure

Volume 7 Issue 2 June - August 2018

Research Paper

Numerical Study on Effect of Dent Dimensions on Buckling Resistance of Thin Stainless Steel Cylindrical Shell Under Lateral Pressure

N. Rathinam*, B. Prabu**

* Assistant Professor, Department of Mechanical Engineering, Pondicherry Engineering College, Puducherry, India.

** Professor, Department of Mechanical Engineering, Pondicherry Engineering College, Puducherry, India.

Rathinam, N., Prabu, B. (2018). Numerical Study on Effect of Dent Dimensions on Buckling Resistance of Thin Stainless Steel Cylindrical Shell Under Lateral Pressure. i-manager's Journal on Structural Engineering, 7(2), 12-26. https://doi.org/10.26634/jste.7.2.14484

Abstract

Externally pressurized thin cylindrical shells are usually designed based on buckling criteria. The resistance of cylindrical shells under critical buckling pressure load is mainly deteriorated by the geometrical imperfections present on these structures. The dent is one of the local geometrical imperfections, which may be formed in the shells owing to accident or impact loading on them during erection or during on service. In order to numerically investigate the influence of dent dimensions (dent width, dent depth, dent length, and dent inclination) and cylindrical shell dimensions (R/t ratio and L/R ratio) on the buckling resistance of stainless steel dented cylindrical shells, numerical models are generated with a centrally located dent. These models are analyzed using nonlinear general FE software ANSYS with ring type boundary condition at both bottom and top edges.