Best Level of Parameters for a Critical Buckling Load for Circular Thin- Walled Structure Subjected to Bending

Abstract

Circular thin walled structures have wide range of applications. This type of structure is generally exposed to different types of loads, but one of the most important types is a buckling. In this work, the phenomena of buckling was studied by using finite element analysis. The circular thin walled structure in this study is constructed from; cylindrical thin shell strengthen by longitudinal stringers, subjected to pure bending in one plane. In addition, Taguchi method was used to identify the optimum combination set of parameters for enhancement of the critical buckling load value, as well as to investigate the most effective parameter. The parameters that have been analyzed were; cylinder shell thickness, shape of stiffeners section and the number of stiffeners. Furthermore, to verify the contribution of parameters on buckling response, the analysis of variance technique (ANOVA) method was implemented, which gave the contribution weight as percentages. The analysis of results by these two methods showed that the more effective parameter on the critical buckling load was the thickness of cylinder’s shell and the lowest effective was the number of stiffeners The values of parameters that gave the best critical buckling load combination were: 1) the ratio of cylinder’s diameter to thickness of its shell was 133, 2) the ratio of the depth to thickness of stiffeners was1.6, and 3) the number of stiffeners was 12.

Holes' Parameters Analysis of a Perforated Thin-Walled Lipped Beam Buckled Under a Bending Load

“…Moreover, the method employs a statistical measurement named the ratio of the mean (called signal) to the standard deviation (called noise) (S/N), which represents a logarithmic function of the wanted output. There are three standard types of S/N ratio; higher the best (HB), lower the best (LB) and nominal the better (NB) [19], [21] and [26]. In this study, the higher buckling strength is required; therefore, the higher, the better formula is used:…”

Parametric Study on Buckling Behavior of Aluminum Alloy Thin-Walled Lipped Channel Beam with Perforations Subjected to Combined Loading

“…One of the optimization methods is Taguchi technique that uses a signal to noise (S/N) ratio, an orthogonal array, and analysis of variance (ANOVA) to find the best set of parameters and the most influential on buckling strength. Taguchi can be used for reducing the cost and time required to perform the experiments [21][22][23][24][25][26]. There is very little research which investigated the effect of holes on the buckling strength of a cantilever beams.…”