Object grating method application in strain determination on ctod tests
| Autor: | Maks Oblak, Damir Semenski, Nenad Drvar, Nenad Gubeljak, Dražan Kozak, Jožef Predan |
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| Přispěvatelé: | Jecić, Stjepan, Semenski, Damir |
| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
Materials science
genetic structures Mechanical Engineering Crack tip opening displacement technology industry and agriculture Fracture mechanics respiratory system Crack growth resistance curve Crack closure Fracture toughness Mechanics of Materials mental disorders Crack initiation CTOD Heterogeneous weld joint Object grating method Photogrammetry Fracture (geology) Composite material Deformation (engineering) Joint (geology) object grating method CTOD test strain determination |
| Popis: | Standard fracture toughness tests require standard specimens with the presumption that mechanical properties are uniform in the crack growth direction. Standards for CTOD fracture tests prescribe remote crack mouth opening displacement-CMOD, which can lead to in-adequate results in the case of heterogeneous materials properties. This paper describes the application of an object grating method on the fracture behaviour of a heterogeneous specimen. Fracture behaviour is described by measuring deformation on the surface of a specimen, in terms of crack tip opening displacement and, consequently, by strain determination. An object grating method is advantageously used when measuring modified CTOD tests on two specimens with an initial crack in a macroscopic heterogeneous welded joint. Results significantly show that fracture behaviour depends on the material in the vicinity of the crack tip concerning the direction of crack propagation. |
| Databáze: | OpenAIRE |
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