TY - JOUR

T1 - Prediction of edge and tunnelling crack formation in layered ceramics using a stress-energy fracture criterion

AU - Papšík, Roman

AU - Ševeček, Oldřich

AU - Hofer, Anna-Katharina

AU - Kraleva, Irina Rosenova

AU - Kreith, Josef

AU - Bermejo, Raul

N1 - 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

PY - 2023/7/1

Y1 - 2023/7/1

N2 - 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.

AB - 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.

UR - https://www.sciencedirect.com/science/article/pii/S0955221922009839

U2 - 10.1016/j.jeurceramsoc.2022.12.022

DO - 10.1016/j.jeurceramsoc.2022.12.022

M3 - Article

VL - 43

SP - 2928

EP - 2934

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

SN - 0955-2219

IS - 7

ER -