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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Numerical simulation of ductile crack growth in medium wide plate specimens using 3-D computational cells

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Autor(es):
Sarzosa, Diego F. B. ; Verstraete, Matthias ; Hertele, Stijn ; Denys, Rudi ; Ruggieri, Claudio
Número total de Autores: 5
Tipo de documento: Artigo Científico
Fonte: ENGINEERING FRACTURE MECHANICS; v. 168, n. A, p. 26-45, DEC 2016.
Citações Web of Science: 3
Resumo

This work examines the applicability of a local damage method based on the computational cell methodology, incorporating the Gurson-Tvergaard (GT) yielding model, to predict ductile crack extension of circumferential crack-like defects in Medium Wide Plates (MWP) specimens, extracted from girth welds of pipelines, using standard single edge bend SE(B) specimen and recently standardized clamped single edge tension SE(T) specimens to obtain model parameters. Laboratory testing of SE(B) and SE(T) specimens at room temperature provides necessary and sufficient information to calibrate the parameters of the GT yielding law. After the model parameters have been defined using small specimens, predictions of crack growth behavior can be carried out for other geometries and loading modes. Therefore, parameter transferability between different specimens can be investigated and comparative studies of predicted crack driving forces can be performed. In this study, the simulated tearing resistance curves are compared to experimental data of MWP specimens, where the former is obtained by the cell model calibrated using either SE(T) or SE(B) specimens and the latter is obtained by large-scale experiments. Overall, a good agreement between numerical and experimental delta-Delta a curves was observed demonstrating that the cell methodology can be considered as a valid engineering tool for studying the integrity of structural components. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

Processo FAPESP: 13/01139-2 - Correlação do comportamento à fratura entre dutos com trincas circunferenciais e corpos de prova incluindo o rasgamento dúctil da trinca
Beneficiário:Diego Felipe Sarzosa Burgos
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado