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Numerical analysis of fracture mechanisms and failure modes in bi-layered structural components

Carpinteri, Alberto and Paggi, Marco Numerical analysis of fracture mechanisms and failure modes in bi-layered structural components. Finite Elements in Analysis and Design, 43 (11–12). 941 - 953. ISSN 0168-874X (2007)

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The problem of crack propagation in bi-layered structural components is addressed. Due to the presence of the bi-material interface and depending on the loading direction, a competition between different crack trajectories (failure modes) can take place. The quantification of the dominant failure mode and of the prevailing fracture mechanism is very often a challenging task, although it is crucial for design purposes. In this contribution, starting from the experimental observation of failure modes in a variety of engineering applications involving bi-layered structural components, an interpretation is proposed in the framework of the finite elements discretization and linear elastic fracture mechanics. The effect of thermo-elastic and residual stresses on the stability of crack propagation is carefully examined. Numerical results confirm the qualitative experimental observations of failure modes in bi-layered structural elements used for rock drilling applications.

Item Type: Article
Identification Number: 10.1016/j.finel.2007.06.003
Uncontrolled Keywords: Linear elastic fracture mechanics; Bi-layered structural components; Fracture mechanisms; Failure modes; Thermo-elastic and residual stresses
Subjects: T Technology > TJ Mechanical engineering and machinery
Research Area: Computer Science and Applications
Depositing User: Prof Marco Paggi
Date Deposited: 28 Nov 2013 14:15
Last Modified: 09 Oct 2014 09:20
URI: http://eprints.imtlucca.it/id/eprint/1961

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