Computation of mixed mode stress intensity factors in a four-point bend specimen

Four-point bend specimen is one of the most important specimens of the fracture mechanics because it can produce mixed modes I and II. Therefore, computation of stress intensity factors in this specimen is of practical interest. Several relations have been suggested that no one of them has completel...

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Bibliographic Details
Published in:Applied mathematical modelling 2008-07, Vol.32 (7), p.1281-1288
Main Authors: Shahani, A.R., Tabatabaei, S.A.
Format: Article
Language:English
Subjects:
Anti-symmetric four-point bend specimen
Exact sciences and technology
Fracture mechanics (crack, fatigue, damage...)
Fundamental areas of phenomenology (including applications)
Mixed mode fracture mechanics
Physics
Solid mechanics
Stress intensity factors
Structural and continuum mechanics
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Summary:Four-point bend specimen is one of the most important specimens of the fracture mechanics because it can produce mixed modes I and II. Therefore, computation of stress intensity factors in this specimen is of practical interest. Several relations have been suggested that no one of them has completely considered the effects of the loading point and crack geometry. In this paper, mixed mode stress intensity factors of the bend specimen are computed by finite element method (FEM) and after validating by comparing with the available results in the literature, the results will be assessed to determine the effects of different crack location and loading distances from the middle of the specimen. Finally, two new coefficients comprising these effects are introduced.
ISSN:0307-904X
DOI:10.1016/j.apm.2007.04.001