On stress concentration analysis of inverse distance weighted function based finite FGM panel with circular hole under biaxial loading

Abstract

Purpose

Inverse distance weighted (IDW) functions are utilized to make models of heterogenous materials such as functionally graded materials (FGM) in computer aided design (CAD). However, the use of IDW function based FGM for stress concentration reduction is scarcely available in the literature. The present work aims to analyze and reduce the stress concentration around a circular hole in IDW function-based finite FGM panel under biaxial loading.

Design/methodology/approach

Extended finite element method (XFEM) model was prepared using MATLAB to investigate the effect of geometrical and material parameters on the stress concentration factor (SCF). The obtained results of IDW FGM are compared with homogeneous material as well as two different FGMs based on the power-law function.

Findings

It was observed that the IDW function based FGM is simple in material modeling, conformal with all domain boundaries and shows lower stress concentration in comparison with the homogeneous material case. While comparing IDW FGM with power-law based FGMs, it was observed that the IDW FGM has least values of stress concentration for low d/W (diameter of the hole to panel width ratio) and is comparable with power-law based FGMs for high d/W.

Originality/value

It can be stated that IDW FGM is highly suitable for stress concentration reduction in finite panels with d/W = 0.5, which can further be intended for obtaining optimum hole and panel designs.

Citation

Goyat, V., Enab, T.A., Ghangas, G., Kadiyan, S. and Kumar, A. (2022), "On stress concentration analysis of inverse distance weighted function based finite FGM panel with circular hole under biaxial loading", Multidiscipline Modeling in Materials and Structures, Vol. 18 No. 4, pp. 708-733. https://doi.org/10.1108/MMMS-04-2022-0070