Comparison of Plastic Collapse Solutions for Surface Breaking Flaws in Standard Assessment Procedures With FEA

Autor:	Rajil Saraswat, Ali Mirzaee-Sisan
Rok vydání:	2013
Předmět:	Surface (mathematics) Toughness Engineering business.industry Collapse (topology) Critical assessment Structural engineering Integrity assessment business Failure mode and effects analysis Failure assessment Finite element method
Zdroj:	Volume 4B: Pipeline and Riser Technology.
DOI:	10.1115/omae2013-11500
Popis:	Engineering Critical Assessment (ECA) procedures generally use the Failure Assessment Diagram (FAD) concept for integrity assessment of components containing flaws. An FAD assessment is described by Kr and Lr values, where Kr reflects the toughness of the material while Lr measures the proximity to plastic collapse. Nowadays pipeline girth welds generally have high fracture toughness (Kmat) and it can be argued that plastic collapse is the governing failure mode. The definition of plastic collapse can affect the determination of the Lr parameter and should be carefully chosen. In the present work finite element analysis has been carried out to evaluate the collapse load under local collapse and global collapse conditions. These have been compared with the solutions available in the BS7910 and R6 procedures and the differences have been highlighted. The impact of the choice of plastic collapse solution on the crack driving force has been analysed.Copyright © 2013 by ASME
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::365c92f6481fd2e31e17a57352ded413 https://doi.org/10.1115/omae2013-11500 Zobrazit plný text záznamu