Boundary element analysis of fatigue behavior for CFRP-strengthened steel plates with center inclined cracks

Boundary element analysis of fatigue behavior for CFRP-strengthened steel plates with center... This paper presents a numerical study on the stress intensity factor (SIF) and fatigue behavior of carbon fiber-reinforced polymer (CFRP) strengthened steel plates with center inclined cracks under uniaxial tensile fatigue loading. Effects of prestress level in CFRP and initial crack inclination angle were investigated. Results indicated that the CFRP laminates could reduce the mode I SIF and effective SIF range, thereby enhancing the fatigue life of the steel plates. The strengthening was more efficient by using the prestressing technique. It was found that fatigue life was approximate for specimens with an identical crack projection length on the plane perpendicular to the load. This indicated that the effect of the initial crack inclination angle on the fatigue crack propagation life of the steel plate was limited when subjected to a unidirectional load. The findings of this study can be adopted as a reference for the repair of existing metallic structures with inclined cracks. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Thin-Walled Structures Elsevier

Boundary element analysis of fatigue behavior for CFRP-strengthened steel plates with center inclined cracks

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Publisher
Elsevier
Copyright
Copyright © 2018 Elsevier Ltd
ISSN
0263-8231
eISSN
1879-3223
D.O.I.
10.1016/j.tws.2018.01.028
Publisher site
See Article on Publisher Site

Abstract

This paper presents a numerical study on the stress intensity factor (SIF) and fatigue behavior of carbon fiber-reinforced polymer (CFRP) strengthened steel plates with center inclined cracks under uniaxial tensile fatigue loading. Effects of prestress level in CFRP and initial crack inclination angle were investigated. Results indicated that the CFRP laminates could reduce the mode I SIF and effective SIF range, thereby enhancing the fatigue life of the steel plates. The strengthening was more efficient by using the prestressing technique. It was found that fatigue life was approximate for specimens with an identical crack projection length on the plane perpendicular to the load. This indicated that the effect of the initial crack inclination angle on the fatigue crack propagation life of the steel plate was limited when subjected to a unidirectional load. The findings of this study can be adopted as a reference for the repair of existing metallic structures with inclined cracks.

Journal

Thin-Walled StructuresElsevier

Published: Apr 1, 2018

References

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