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A phase-field model for anisotropic brittle fracturing of piezoelectric ceramics

  • A. Sridhar
  • M.-A. KeipEmail author
Computational Mechanics
  • 150 Downloads

Abstract

Piezoelectric ceramics are inherently brittle materials that show electromechanical coupling under electrical and mechanical stimuli. In the last decades piezoelectric materials have garnered significant attention due to their established applications as sensors and actuators. In this context the structural reliability of such materials under varied conditions is paramount. In the present work we propose a phase-field approach to model crack propagation in a coupled electromechanical setting. The proposed framework accounts for anisotropic crack propagation by employing appropriate structural tensors that enter the crack-surface-density function as additional arguments. Appropriate choices of degradation functions allow for the accommodation of varied electrical boundary conditions along cracks. Based on experimental results available in the literature, we employ a non-associative dissipative framework in which fracturing processes are driven by the mechanical part of the coupled electromechanical driving force alone. The modeling capabilities of the proposed framework are demonstrated by a set of numerical examples in two and three spatial dimensions.

Keywords

Electromechanics Piezoelectrics Fracturing Phase-field models Anisotropy 

Notes

Acknowledgements

Funding was provided by German Research Foundation (Grant no. KE 1849/2-2).

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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Department of Civil and Environmental Engineering, Institute of Applied MechanicsUniversity of StuttgartStuttgartGermany

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