An easy and engineering stability criterion of general singular stressconcentrators

0509554 - ÚFM 2020 RIV NL eng J - Journal Article
Klusák, Jan - Krepl, Ondřej - Profant, T.
An easy and engineering stability criterion of general singular stressconcentrators.
Theoretical and Applied Fracture Mechanics. Roč. 104, DEC (2019), č. článku 102341. ISSN 0167-8442. E-ISSN 1872-7638
R&D Projects: GA MŠMT(CZ) LQ1601; GA ČR GA17-01589S
Institutional support: RVO:68081723
Keywords : Fracture mechanics * Stability criterion * General singular stress * Controlling quantity
OECD category: Audio engineering, reliability analysis
Impact factor: 3.021, year: 2019
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0167844219301077?via%3Dihub

General singular stress concentrators often occur in engineering components and they represent places prone tocrack initiation. Estimation of crack initiation conditions is usually performed by means of stability criteria ofgeneralized fracture mechanics. These stability criteria require knowledge of asymptotic description of the stressstate around the general singular stress concentrator. In cases of some concentrators, this analytical-numericaldescription can be quite difficult and does not belong among straightforward engineering approaches. This paperintroduces an easy and engineering way to assess conditions for crack initiation and propagation in generalsingular stress concentrators using standard numerical approaches. The paper handles well-known criteria ofgeneralized fracture mechanics of sharp and bi-material notches and simplifies them to a practical form usablefor engineers. The resulting criterion fits the frame of criteria of finite fracture mechanics and extends theirapplicability.
Permanent Link: http://hdl.handle.net/11104/0301462