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1. Important principles of fracture mechanics
1.1 Context
Fracture mechanics is a study that brings into play the usual parameters of mechanics, starting from an existing discontinuity: a crack or defect. In certain cases, depending on the dimensions of a crack and the loading condition, it is possible to predict the speed of crack propagation and the size at which the crack can lead to sudden rupture. This dimension, commonly referred to as the critical defect size, characterizes the harmfulness of the defect, i.e. the crack size above which the mechanical structure is no longer fit for use due to the loss of performance it causes.
Against this backdrop, it is legitimate to ask: why do accidents nevertheless occur (albeit rarely)? There are several possible answers. The first reason is, of course, that...
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Important principles of fracture mechanics
Linear fracture mechanics and stress intensity factors
Bibliography
Software tools
MorfeoCrack (Cenaero)/plugin for Samcef (LMS-Samtech) http://www.cenaero.be/
DARWIN™ http://www.darwin.swri.org
ESACRACK http://www.esacrack.com
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International Conference on Fracture and Damage Mechanics
International Conference on Fatigue Damage of Structural Materials (Hyannis, USA)
Standards and norms
- Certification procedures for products and parts advisory circular – Damage tolerance for high energy turbine engine rotors US department of transportation – Federal aviation administration http://www.faa.gov/regulations_policies/advisory_cirulars/index.cfm/go/document.information/documentID/22920 - AC 33.14-1 -
- Amendment 1, European aviation safety agency http://www.easa.europa.eu/agency-measures/docs/agency-decisions/2010/2010-015-R/CS-E_amendment%203/pdf...
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