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A weakest link mode...
A weakest link model for multiple mechanism brittlefracture - Model development and application
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- Boåsen, Magnus (författare)
- KTH,Hållfasthetslära
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- Dahlberg, Carl F. O., 1980- (författare)
- KTH,Hållfasthetslära
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- Efsing, Pål, 1965- (författare)
- KTH,Hållfasthetslära
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visa fler...
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- Faleskog, Jonas (författare)
- KTH,Hållfasthetslära
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visa färre...
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(creator_code:org_t)
- 2020
- Engelska 46 s.
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Serie: TRITA-SCI-RAP ; 2020:005
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- A multiple mechanism weakest link model for intergranular and transgranularbrittle fracture is developed on the basis of experimental observations in a thermallyaged low alloy steel. The model development is carried out in tandemwith micro mechanical analysis of grain boundary cracking using crystal plasticitymodeling of polycrystalline aggregates with the purpose to inform theweakest link model. The fracture modeling presented in this paper is carriedout by using a non-local porous plastic Gurson model where the void volumefraction evolution is regularized over two separate length scales. The ductilecrack growth preceding the nal brittle fracture is well predicted using this typeof modeling. When applied to the brittle fracture tests, the weakest link modelpredicts the fracture toughness distribution remarkably well, both in terms ofthe constraint and the size eect. Included in the study is also the analysis of areference material.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Teknisk mekanik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Applied Mechanics (hsv//eng)
Nyckelord
- Hållfasthetslära
- Solid Mechanics
Publikations- och innehållstyp
- vet (ämneskategori)
- rap (ämneskategori)