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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/4893
Title: Fatigue crack growth due to overloads in plain concrete using scaling laws
Authors: Ray, Sonalisa
Kishen J.M.C.
Published in: Sadhana - Academy Proceedings in Engineering Sciences
Abstract: Scaling laws are represented in power law form and can be utilized to extract the characteristic properties of a new phenomenon with the help of self-similar solutions. In this work, an attempt has been made to propose a scaling law analytically, for plain concrete when subjected to variable amplitude loading. Due to the application of overload on concrete structures, acceleration in the crack growth process takes place. A closed form expression has been developed to capture the acceleration in crack growth rate in conjunction with the principles of dimensional analysis and self-similarity. The proposed model accounts for parameters such as, the tensile strength, fracture toughness, overload effect and the structural size. Knowing the governed and the governing parameters of the physical problem and by using the concepts of self-similarity, a relationship is obtained between the different parameters involved. The predicted results are compared with experimental crack growth data for variable amplitude loading and are found to capture the overload effect with sufficient accuracy. Through a sensitivity analysis, fracture toughness is found to be the most dominant parameter in accelerating the crack length due to application of overload. ¬© 2012 Indian Academy of Sciences.
Citation: Sadhana - Academy Proceedings in Engineering Sciences(2012), 37(1): 107-124
URI: https://doi.org/10.1007/s12046-012-0069-1
http://repository.iitr.ac.in/handle/123456789/4893
Issue Date: 2012
Keywords: dimensional analysis
Fatigue
plain concrete
self-similarity
size-effect
variable amplitude
ISSN: 2562499
Author Scopus IDs: 57199001944
6506178790
Author Affiliations: Ray, S., Department of Civil Engineering, Indian Institute of Science, Bangalore 560 012, India
Kishen, J.M.C., Department of Civil Engineering, Indian Institute of Science, Bangalore 560 012, India
Corresponding Author: Kishen, J. M. C.; Department of Civil Engineering, Indian Institute of Science, Bangalore 560 012, India; email: chandrak@civil.iisc.ernet.in
Appears in Collections:Journal Publications [CE]

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