Experimental and Simulation Study of Film Crack on Zinc-Coated 2Cr13 Steel Cables
Publication: Journal of Materials in Civil Engineering
Volume 31, Issue 2
Abstract
An experimental and simulation study on mechanical properties and cracking behavior of zinc film on 2Cr13 steel is carried out. The three-point bend with the acoustic emission technique and uniaxial tension tests were innovatively conducted to study the film fracture toughness and the critical thickness of zinc film at different strains. Meanwhile, simulations were made to analyze the influence of different factors on the dimensionless energy release rate of a surface crack and the stress field around the crack tip with the extended finite-element method. Results indicate that the film will not crack until the film thickness reaches the critical thickness, which decreases with the increase of tensile strain. The elastic modulus ratio, the thickness ratio, and the crack spacing have great impacts on the crack energy release rate and substrate stresses around the crack tip. Also, if the substrate stiffness is greater than the film stiffness for a given film thickness, the substrate thickness and the crack spacing are greater when the crack propagation is in a steady state.
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Acknowledgments
The first author would like to express his gratitude to all those who helped him do the experiments described previously and polish the language during the writing of this paper. Meanwhile, the remaining authors are particularly grateful to all anonymous reviewers and editors for the improvement of this paper.
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Published In
Journal of Materials in Civil Engineering
Volume 31 • Issue 2 • February 2019
Copyright
©2018 American Society of Civil Engineers.
History
Received: Apr 6, 2018
Accepted: Aug 2, 2018
Published online: Nov 21, 2018
Published in print: Feb 1, 2019
Discussion open until: Apr 21, 2019
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