Reliability assessment of a bi-material notch: Strain energy density factor approach

0354586 - ÚFM 2011 RIV NL eng J - Journal Article
Klusák, Jan - Knésl, Zdeněk
Reliability assessment of a bi-material notch: Strain energy density factor approach.
Theoretical and Applied Fracture Mechanics. Roč. 53, č. 2 (2010), s. 89-93. ISSN 0167-8442. E-ISSN 1872-7638
R&D Projects: GA ČR GAP108/10/2049; GA ČR GA101/08/0994
Institutional research plan: CEZ:AV0Z20410507
Keywords : crack initiation * bi-material notch * strain energy density factor
Subject RIV: JL - Materials Fatigue, Friction Mechanics
Impact factor: 1.073, year: 2010

Joints of different materials have many applications in structural engineering and microelectronics. In the present contribution the joint is modelled as a bi-material notch. The singular stress field near the notch tip is investigated. Depending on the notch geometry and materials, the stress field can have one or two singularities. It is shown that to study the problem of a crack onset at the notch, both terms have to be taken into account. Criteria for the direction and for crack nucleation are formulated. The approach utilizes the knowledge of the strain energy density factor distribution in a bi-material notch vicinity.
Permanent Link: http://hdl.handle.net/11104/0193556