Applicable Formulas for Shear and Thermal Buckling of Perforated Rectangular Panels

Husam Al Qablan,Ying Qin

doi:10.1155/2022/3790462

Abstract

The goal of this study is to create semiempirical formulations for predicting thermal and shear buckling loads of perforated rectangular isotropic panels for eight combinations of boundary conditions. The finite element method (FEM) was used to develop and evaluate empirical formulations. In this study, the influences of plate aspect ratios, boundary conditions, and perforation sizes on the buckling strength of perforated panels subjected to shear and thermal loads are investigated. The proposed formulas will enable consistent and reliable computation of the buckling loads for perforated rectangular panels without the need for complex calculations. The results of the empirical equations were found to be reasonably consistent with the outcomes of finite element analysis (FE) and findings from the literature. Various perforation patterns are investigated, ranging from a single circular hole up to 441 circular holes distributed across the plate. The results show that plates with a single central cutout have lower shear buckling loads than plates with multiple holes and an equal total cutout area.

Highlights

Rectangular plate buckling is an important aspect of structural design, especially if lightweight design is the primary goal
Earlier investigations on the buckling of perforated panels focused on the effects of loading instances, boundary conditions, hole size, shape, number, and position on the buckling pattern of rectangular plates
Due to the intricacy of the problem, most researchers studied the buckling conduct of perforated isotropic supported rectangular panels utilizing the finite element method (FEM) and/or the Rayleigh–Ritz method [1, 4, 6,7,8,9,10,11,12]

Summary

Introduction

Rectangular plate buckling is an important aspect of structural design, especially if lightweight design is the primary goal. For isotropic square panels and thin-walled channel sections with circular and square perforations, [3] used the FEM and the Spline Finite Strip Method to calculate the shear buckling force. For design reasons, he gives approximation equations for shear buckling coefficients. Is study investigates the buckling demeanor of perforated isotropic rectangular plates with various boundary conditions exhibited to shear and thermal load conditions. E primary goal of this study is to develop a set of efficient closed-form semiempirical equations that can be used to quickly analyse and predict buckling loads for isotropic rectangular perforated panels without requiring extensive calculations. To validate the veracity of the suggested semiempirical formulations, the results of the suggested equations, the FEM, and the available literature findings were contrasted

Problem Formulation

Figure 1

Examples and Discussions

Findings

10 SSSS 20