Prediction of edge and tunnelling crack formation in layered ceramics using a stress-energy fracture criterion

Publikation: Beitrag in FachzeitschriftArtikelForschungBegutachtung


A coupled stress-energy criterion is utilized to predict initiation of both edge and tunnelling cracks in layered ceramics containing thermal residual stresses. Edge (surface) cracks may originate in layers having high compressive in-plane stresses while tunnelling (internal) cracks may form in layers with high tensile in-plane stresses. This work investigates the influence of both the residual stresses magnitude and layer thickness on the formation of surface cracks and provides a design map defining safe regions where no cracks will be present in the sintered multilayer architecture upon reaching the room temperature. Necessary stress and energy inputs to evaluate the coupled criterion are calculated using the finite element method. Simulation results are validated with experimental observations on sample architectures fabricated with layers of various thicknesses and in-plane thermal residual stresses. The good agreement demonstrates the potential of the stress-energy coupled criterion for designing crack-free multi-layered ceramic architectures.
Seiten (von - bis)2928-2934
FachzeitschriftJournal of the European Ceramic Society
Frühes Online-Datum13 Dez. 2022
PublikationsstatusVeröffentlicht - 1 Juli 2023

Bibliographische Notiz

Funding Information:
Funding for this research was provided by the European Research Council (ERC) excellent science grant “CERATEXT” through the Horizon 2020 program under contract 817615 .

Publisher Copyright:
© 2022 The Authors

Dieses zitieren