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An XFEM Based Parametric Study on Crack Growth Rate in Welded Joints with Defects

An XFEM Based Parametric Study on Crack Growth Rate in Welded Joints with Defects
Author(s): , ORCID,
Presented at IABSE Conference: Bridges and Structures Sustainability - Seeking Intelligent Solutions, Guangzhou, China, 8-11 May 2016, published in , pp. 716-723
DOI: 10.2749/222137816819259068
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Welded joints are the most fatigue-prone parts of the steel structures, especially for the long-span bridges with orthotropic steel decks(OSDs). One of the most important internal causes might be t...
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Bibliographic Details

Author(s):
ORCID

Medium: conference paper
Language(s): English
Conference: IABSE Conference: Bridges and Structures Sustainability - Seeking Intelligent Solutions, Guangzhou, China, 8-11 May 2016
Published in:
Page(s): 716-723 Total no. of pages: 8
Page(s): 716-723
Total no. of pages: 8
Year: 2016
DOI: 10.2749/222137816819259068
Abstract:

Welded joints are the most fatigue-prone parts of the steel structures, especially for the long-span bridges with orthotropic steel decks(OSDs). One of the most important internal causes might be the defects introduced by welding processes, which may significantly affect the crack growth rate(CGR). Assuming that the welded joints have randomly distributed defects, i.e. inclusions and pores, representative volume elements (RVEs) were generated and studied based on extended Finite Element Method (XFEM).A coefficient that modifies the Paris constant C was introduced, and a parametric study on this coefficient was conducted to present the effects on CGR. The analysis showed that the location of defects is so significant on this issue that the incapability of taking account to it using volume fractions may lead to inaccurate or scattered results.

Keywords:
welded joints XFEM crack growth rate Weld-defects