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Acta Mechanica Sinica
Erschienen in: Acta Mechanica Sinica 2/2017

27.12.2016 | Research Paper

Experimental study on cracking behaviour of moulded gypsum containing two non-parallel overlapping flaws under uniaxial compression

verfasst von: Lekan Olatayo Afolagboye, Jianming He, Sijing Wang

Erschienen in: Acta Mechanica Sinica | Ausgabe 2/2017

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Abstract

Failure of rock mass that is subjected to compressive loads occurs from initiation, propagation, and linkage of new cracks from preexisting fissures. Our research investigates the cracking behaviour and coalescence process in a brittle material with two non-parallel overlapping flaws using a high-speed camera. The coalescence tensile crack and tensile wing cracks were the first cracks to occur from the preexisting flaws. The initiation stresses of the primary cracks at the two tips of each flaw were simultaneous and decreased with reduced flaw inclination angle. The following types of coalescence cracks were identified between the flaws: primary tensile coalescence crack, tensile crack linkage, shear crack linkage, mixed tensile-shear crack, and indirect crack coalescence. Coalescence through tensile linkage occurred mostly at pre-peak stress. In contrast, coalescence through shear or mixed tensile-shear cracks occurred at higher stress. Overall, this study indicates that the geometry of preexisting flaws affect crack initiation and coalescence behaviour.
Vorheriger Artikel Experimental study and electromechanical model analysis of the nonlinear deformation behavior of IPMC actuators
Nächster Artikel The axisymmetric torsional contact problem of a functionally graded piezoelectric coated half-space

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Metadaten
Titel
Experimental study on cracking behaviour of moulded gypsum containing two non-parallel overlapping flaws under uniaxial compression
verfasst von
Lekan Olatayo Afolagboye
Jianming He
Sijing Wang
Publikationsdatum
27.12.2016
Verlag
The Chinese Society of Theoretical and Applied Mechanics; Institute of Mechanics, Chinese Academy of Sciences
Erschienen in
Acta Mechanica Sinica / Ausgabe 2/2017
Print ISSN: 0567-7718
Elektronische ISSN: 1614-3116
DOI
https://doi.org/10.1007/s10409-016-0624-9

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