Ductile tearing analyses of cracked TP304 pipes using the multiaxial fracture strain energy model and the Gurson–Tvergaard–Needleman model

Ductile crack growth behaviours of TP304 pipes containing different circumferential defects were investigated in the study. Finite element (FE) damage analysis of the ductile fracture was carried out based on an uncoupled multiaxial fracture strain energy (MFSE) model with only two model parameters,...

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Bibliographic Details
Published inFatigue & fracture of engineering materials & structures Vol. 43; no. 10; pp. 2402 - 2415
Main Authors Wang, Tao, Wen, Jian‐Feng, Kim, Yun‐Jae, Tu, Shan‐Tung
Format Journal Article
LanguageEnglish
Published Oxford Wiley Subscription Services, Inc 01.10.2020
Subjects
Crack initiation
Crack propagation
Damage assessment
damage mechanics
Ductile fracture
Finite element method
Fracture toughness
Gurson–Tvergaard–Needleman model
Heat treating
multiaxial fracture strain energy model
Pipe tests
Strain energy
Tearing
Tensile tests
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Summary:Ductile crack growth behaviours of TP304 pipes containing different circumferential defects were investigated in the study. Finite element (FE) damage analysis of the ductile fracture was carried out based on an uncoupled multiaxial fracture strain energy (MFSE) model with only two model parameters, which can be calibrated by data from tensile tests and fracture toughness tests. For the purpose of comparison, the Gurson–Tvergaard–Needleman (GTN) model was also employed in the FE damage analysis. It is observed that the MFSE model can reproduce the ductile tearing experiments as excellently as the GTN model does. Despite its simplicity, the MFSE model can reasonably predict the magnitudes of the crack initiation load and maximum load, the load‐line displacement, the crack mouth opening displacement, the crack extension and the crack profiles in the full‐scale cracked pipe tests.
ISSN:8756-758X
1460-2695
DOI:10.1111/ffe.13311