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MODELING AND STRESS CONCENTRATION ANALYSIS OF UNCOATED AND FGM COATED INCLUSIONS: A REVIEW

ABSTRACT

The aim of this work is to present a review on modeling and stress concentration analysis around uncoated and the functionally graded material (FGM) coated inclusions subjected to different mechanical and thermal load conditions. The literature review mainly focus on modeling and analysis of uncoated inclusions, introduction and applications of FGMs, Extended Finite Element Method (XFEM), stress concentration reduction analysis around homogeneous material coated and FGM coated inclusions. It is noticed from the work that FGM is a suitable materiel to reduce stress concentration around different kind of geometrical and material discontinuities such as holes, notches, inclusions material interfaces, etc. The power law function is observed most efficient FGM function in literature review as it has ability to vary gradation by varying its coefficient. The XFEM method is an efficient numerical method which can handle different geometrical and material discontinuities without a conformal mesh. There is a wide scope of XFEM in modelling and analysis of stress concentration around FGM coated inclusions. Level set method nowadays an integral part of XFEM to handle the discontinuities. Level set function based FGMs are tested in literature for holes and found helpful in modeling a FGM layer around a complicated shape discontinuity as well as multiple discontinuities. The level set function based power law FGMs have a scope to be tested for stress concentration reduction around different inclusions.

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