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Wolverhampton Intellectual Repository and E-Theses > School of Technology > School of Engineering and the Built Environment > Engineering and Technology > A Finite Element Analysis of the Stress Intensity Resulting from Single-Edge Pre-Cracked Beam Loading Conditions

Please use this identifier to cite or link to this item: http://hdl.handle.net/2436/29606
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Title: A Finite Element Analysis of the Stress Intensity Resulting from Single-Edge Pre-Cracked Beam Loading Conditions
Authors: Kibble, Kevin A.
Turner, D.
Citation: Journal of Testing and Evaluation, 29(3): 285-292
Publisher: ASTM International
Journal: Journal of Testing and Evaluation
Issue Date: 2001
URI: http://hdl.handle.net/2436/29606
DOI: 10.1520/JTE12257J
Additional Links: http://www.astm.org/DIGITAL_LIBRARY/JOURNALS/TESTEVAL/PAGES/1766.htm
Abstract: The single-edge precracked-beam (SEPB) fracture toughness method has been investigated using finite element methods to analyze the stress intensity (K1) resulting from variations in bridge span, punch length, and virtual crack length. A two-dimensional half-plane, semi-infinite model was used to approximate the stress intensity from a fit of the nodal displacements of a crack face under SEPB loading conditions. The finite element method models the crack in situ, using six-node triangular elements specified around a singular point that simulates the crack tip. The analysis reveals that for increasing virtual crack length (), the stress intensity increases to a maximum where / = 0. With further increasing virtual crack length, the stress intensity decreases. The inflection point differs for varying span and fixed punch length, and for varying punch lengths with fixed span. The resulting stress intensities per new ton force loading are presented in tabular and graphical form. The presented series of graphs can be used to explore variations in precracking parameters. This finite element analysis provides useful data for those developing or adopting the SEPB fracture toughness measurement technique.
Type: Article
Language: en
Description: Presented is a finite element analysis (FEA) that provides data for those developing or adopting the single-edge pre-cracked beam (SEPB) fracture toughness technique. The analysis gives the stress intensity (K1) resulting from variations in bridge span, punch length, and virtual crack length. The resulting stress intensities per Newton force loading are presented in tabular and graphical form, which can be used to explore variations in pre-cracking parameters and thus arrive at the optimum test geometry and the manufacture of the correct test tooling.
Keywords: SEPB
Stress intensity
Bridge indentation
Fracture toughness
Modelling
Engineering technology
Single-edge precracked beam (SEPB)
Finite element analysis
ISSN: 0090-3973
Appears in Collections: Engineering and Technology

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