Cracks and multiple voids resulting from manufacturing processes interact with each other and severely affect the fracture phenomenon of piezoelectric components. These geometrical discontinuities degrade the service performance and lower the reliability of the piezoelectric devices. Therefore, the present work predicts fatigue-cracking behavior of piezo-electric structures in existence of multiple geometrical discontinuities under cyclic thermal-electrical-mechanical loads using extended finite element method (XFEM). Thermal interaction integrals approach and Stroh formalism are applied for estimating stress intensity factors (SIFs). Modified hoop SIF criterion has been utilized to predict crack growth direction under quasi-static fatigue loading conditions. © 2019 Elsevier Ltd

Ramesh Gupta Burela

Mechanical Engineering

(SoE) School of Engineering

Mishra R.

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Shiv Nadar University

Theoretical and Applied Fracture Mechanics

Multiple voids and cracks were generated during material processing techniques, which interact with each other and affects the service performance of piezoelectric components. This work aims to study the behavior of piezoelectric components in presence of multiple cracks under thermo-electro-mechanical loading environment. Extended finite element method has been implemented to model geometrical discontinuities with crack interaction phenomenon. In this work, thermo-electro- mechanical problem has been decoupled into thermal and electro-elastic problems. Temperature distribution has been obtained by solving heat conduction equation and then used as an input to the electro-elastic problem. In post processing phase, interaction integral method and generalized Stroh formalism were used to predict the stress intensity factors. The methodology has been implemented with in-house developed MATLAB code. Set of cases for crack interaction studies were presented using the proposed approach. © 2018, Springer Nature B.V.

International Journal of Mechanics and Materials in Design

Crack interaction study in piezoelectric materials under thermo-electro-mechanical loading environment

Engineering Analysis with Boundary Elements

Fatigue crack analysis in piezoelectric specimens by a single-domain BEM

Engineering Fracture Mechanics

A simplified evaluation of the mechanical energy release rate of kinked cracks in piezoelectric materials using the boundary element method

Numerical simulation of crack growth in piezoelectric structures by BEM

Dynamic crack analysis in piezoelectric solids under time-harmonic loadings with a symmetric Galerkin boundary element method

Thermo-electro-mechanical fatigue crack growth simulation in piezoelectric solids using XFEM approach