Publication detail
Prediction of edge and tunnelling crack formation in layered ceramics using a stress-energy fracture criterion
PAPŠÍK, R. ŠEVEČEK, O. HOFER, A. KRALEVA, I. KREITH, J. BERMEJO, R.
English title
Prediction of edge and tunnelling crack formation in layered ceramics using a stress-energy fracture criterion
Type
journal article in Web of Science
Language
en
Original abstract
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.
English abstract
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.
Keywords in English
Layered ceramics; Coupled criterion; Finite fracture mechanics; Residual stresses; Edge cracks; Tunnelling cracks
Released
01.07.2023
Publisher
ELSEVIER SCI LTD
Location
OXFORD
ISSN
0955-2219
Volume
43
Number
7
Pages from–to
2928–2934
Pages count
7
BIBTEX
@article{BUT183390,
author="Roman {Papšík} and Oldřich {Ševeček} and Anna-Katherina {Hofer} and Irina {Kraleva} and Josef {Kreith} and Raul {Bermejo},
title="Prediction of edge and tunnelling crack formation in layered ceramics using a stress-energy fracture criterion",
year="2023",
volume="43",
number="7",
month="July",
pages="2928--2934",
publisher="ELSEVIER SCI LTD",
address="OXFORD",
issn="0955-2219"
}