A calibration methodology to obtain material parameters for the representation of fracture mechanics based on discrete element simulations

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• 作者：S. Behraftar^a ; ^b ; ^{s.behraftar@uq.edu.au" class="auth_mail" title="E-mail the corresponding author} ; S.A. Galindo Torres^a ; ^b ; ^e ; A. Scheuermann^a ; ^b ; D.J. Williams^b ; E.A.G. Marques^c ; H. Janjani Avarzaman^d
• 关键词：Crack mouth opening displacement ; Dimensional analysis ; Discrete element method
• 刊名：Computers and Geotechnics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：81
• 期：Complete
• 页码：274-283
• 全文大小：2644 K

文摘

A micro-mechanical model is developed to study the fracture propagation process in rocks. The model is represented by an array of bonded particles simulated by the discrete based method. Experimental results of tests using Cracked Chevron Notched Brazilian Discs (CCNBD) with different inclination angles relative to the direction of loading are used to calibrate and validate the model. Dimensional analysis is used to identify and minimise the microscale parameters to be considered. The comparison between experimental and computational results shows a satisfactorily good agreement.