Počet záznamů: 1
3D assessment of surface influence on crack initiation in sharp notches\nunder a mixed mode of loading
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SYSNO ASEP 0539535 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název 3D assessment of surface influence on crack initiation in sharp notches
under a mixed mode of loadingTvůrce(i) Klusák, Jan (UFM-A) RID, ORCID
Kopp, Dalibor (UFM-A)Celkový počet autorů 2 Číslo článku 102920 Zdroj.dok. Theoretical and Applied Fracture Mechanics. - : Elsevier - ISSN 0167-8442
Roč. 112, APR (2021)Poč.str. 11 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova Crack initiation ; Critical quantity criterion ; Finite fracture mechanics ; Vertex singularity Vědní obor RIV JQ - Strojní zařízení a nástroje Obor OECD Applied mechanics CEP LQ1601 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy GA20-00761S GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora UFM-A - RVO:68081723 UT WOS 000661544300003 EID SCOPUS 85100448882 DOI 10.1016/j.tafmec.2021.102920 Anotace Sharp notches occur in constructions and lead to stress concentrations. Thus they are dangerous points of constructions and must be properly evaluated. In the present study the effect of a free surface on crack initiation conditions is observed and evaluated by means of a 3D model of a specimen with a sharp notch and by means of the finite fracture mechanics of general singular stress concentrators (GSSCs). The effect of a free surface on crack propagation and the crack front shape is described in many publications (Hutař et al., 2010, He et al., 2016, Oplt et al., 2019). Concerning GSSCs (sharp notches, bi-material notches, sharp material inclusions, etc.) crack initiation conditions can also be influenced by the presence of the free surface. In our study we suppose the case of a sharp notch in a homogeneous material with a straight notch front perpendicular to the free surface. In this case a crack can be initiated either from the central region of the notch front or at the vertex point (the point where the notch front intersects the free surface). In order to assess the crack initiation conditions in the 3D model, the critical quantity criterion is employed (Klusák et al., 2019). This criterion can be easily used with the knowledge of basic material parameters and with the use of results of finite element calculations of the assessed notch. It is shown that the place of crack initiation depends on the direction of external loading and thus on a mixity of normal and shear modes of loading. A comparison of results of 2D and 3D models is discussed. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2022 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S0167844221000288?via%3Dihub
Počet záznamů: 1