Response Surface Methodology Based Determination of Stress Intensity Factor of Dissimilar Cracks on Composite Surfaces

Volume 13 Issue 4 May - July 2018

Research Paper

Response Surface Methodology Based Determination of Stress Intensity Factor of Dissimilar Cracks on Composite Surfaces

Yugal Kishor Sahu*, Shubhrata Nagpal **

* Research Scholar, Department of Mechanical Engineering, Bhilai Institute of Technology, Durg, Chhattisgarh, India

** Professor, Department of Mechanical Engineering, Bhilai Institute of Technology Durg, Chhattisgarh, India.

Sahu, Y.K., & Nagpal, S. (2018). Response Surface Methodology Based Determination of Stress Intensity Factor of Dissimilar Cracks on Composite Surfaces. i-manager’s Journal on Future Engineering and Technology, 13(4), 28-33.https://doi.org/10.26634/jfet.13.4.14036

Abstract

The methodology used for assessing the structural integrity of a given material plays as crucial role in predicting the Stress Intensity Factor (SIF) arises between neighbouring cracks. The assessment of laminated composite materials and its crack propagation is well studied and several models are available to numerically draw out close approximation of SIF with that of experimental counterpart. However, drawing such models for dissimilar cracks on composite surface remains a daunting problem owing to higher computational expense required to discover and review the exploratory variable dictating the deformation process. In this research, a detailed study has been done on the SIF determination of semi-elliptical cracks corresponding to different depths and aspect ratios of a composite material through the usage of response surface methodology. The numerical results reported in the study are in close agreement with that of experimental output.