Crack initiation criteria for singular stress concentrations, Part IV: Applications to fracture of coated structures

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F08%3A00322243" target="_blank" >RIV/68081723:_____/08:00322243 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Crack initiation criteria for singular stress concentrations, Part IV: Applications to fracture of coated structures

Original language description

The influence of through crack in the protective surface layer on damage of coated structure is investigated. The coated structure is modeled as a particular case of a bi-material body consisting of thin surface layer on the substrate. Specific attentionis devoted to the case of a through coating crack with its tip at the interface between coating and the substrate. To estimate how the coating crack with its tip at the interface influences the substrate failure the general approach described in [1,2,3](Part I,II III of this contribution) is applied. An approximate approach based on calculations of crack mouth opening displacement for thin protective layers is suggested and developed. It is concluded that in the case of a stiffer coating on a more compliant substrate, the through coating cracks represent dangerous stress concentrators and, as a consequence of elastic mismatch of both materials, the critical applied stress for substrate failure decreases.

Czech name

Kritéria iniciace trhlin ze singulárních koncentrátorů napětí. Část IV: Aplikace na povlakované konstrukce

Czech description

Práce se zabývá šířením trhlin v ochranných povlacích a navazuje na 3 předešlé díly publikované v Engineering mechanics. V práci je upozorněno na nízkou prahovou hodnotu pro šíření trhliny přes rozhraní povlak/substrát v případě tvrdého povlaku na poddajném substrátu. Podcenění tohoto efektu by mohlo vést k nekonzervativním odhadům materiálových systémů s povrchovými vrstvami.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JL - Fatigue and fracture mechanics

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2008

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Engineering Mechanics

ISSN

1802-1484

e-ISSN

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Volume of the periodical

15

Issue of the periodical within the volume

4

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

8

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

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