Analysis of Stress Concentration Factor for Tensile Characteristics of Syntactic Foam Using Finite Element Method

Zulzamri Salleh; Md Mainul Islam; Jayantha Ananda Epaarachchi

doi:10.6000/1929-5995.2017.06.01.4

Authors

Zulzamri Salleh Centre for Future Materials, Faculty of Health, Engineering and Sciences, University of Southern Queensland, Toowoomba, QLD 4350, Australia
Md Mainul Islam Centre for Future Materials, Faculty of Health, Engineering and Sciences, University of Southern Queensland, Toowoomba, QLD 4350, Australia
Jayantha Ananda Epaarachchi Centre for Future Materials, Faculty of Health, Engineering and Sciences, University of Southern Queensland, Toowoomba, QLD 4350, Australia

DOI:

https://doi.org/10.6000/1929-5995.2017.06.01.4

Keywords:

Finite element analysis, Syntactic foam, Stress, Concentration, Factor, glass microballoon, resin.

Abstract

This paper presented the stress concentration factor (SCF) around the half circular edge of tensile specimens made of syntactic foam using finite element software Strand7 software. The study is a preliminary effort, which investigates the effect of variations of crack geometry on the stress concentration factor on a tensile specimen subjected to a constant, uniform, uniaxial tensile load. The material property is graded for varying Young’s Modulus and Poisson’s Ratio with different composition of glass microballoons. Finally, a uniform pressure is applied at the top and the model is constrained with symmetric boundary conditions at the left and bottom. As the result, these numerical results for both SCF experimental and simulation model are compared to those obtained from analytic fracture mechanics procedures and are found to be varied. In addition, the SCF is sensitive to the modulus of elasticity, particularly for lower composition weight percentage (wt.%), while it is also varied with the different weight percentage (wt.%) of glass microballoons, which is led by 2 wt.% specimen.

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