Numerical Simulation of Failure of Rock-Like Material Subjected to Compressive Loads Using Improved Peridynamic Method
Publication: International Journal of Geomechanics
Volume 17, Issue 3
Abstract
A novel bond-based peridynamic method is proposed to investigate the initiation, propagation, and coalescence of cracks in brittle rock materials subjected to compressive loads. To simulate the failure of brittle rock materials under compressive loads, tangent bonds are introduced into the bond-based peridynamic theory. By comparing the strain energy with peridynamic energy, the micro-peridynamic parameters can be expressed by the macromechanical parameters of rocks. The novel peridynamic model can solve the problem that the normal bond-based peridynamic theory is limited to constitutive models with a Poisson’s ratio of 1/4 for three-dimensional problems. A program code was compiled to demonstrate the validity of the novel bond-based peridynamic method. It was found that the numerical results of the initiation, propagation, and coalescence of cracks in brittle rock materials subjected to compressive loads are in good agreement with the experimental data.
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Acknowledgments
The work is supported by Project 973 (Grant 2014CB046903), the National Natural Science Foundation of China (Grants 51325903 and 51279218), the Natural Science Foundation Project of CQ CSTC (No. CSTC, cstc2013kjrc-ljrccj0001 and cstc2013jcyjys30002), research funding from the Doctoral Program of Higher Education of China (Grant 20130191110037), and the Chongqing Graduate Student Research Innovation Project (Grant CYB14017).
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Published In
International Journal of Geomechanics
Volume 17 • Issue 3 • March 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Jul 14, 2015
Accepted: Jun 29, 2016
Published online: Aug 26, 2016
Discussion open until: Jan 26, 2017
Published in print: Mar 1, 2017
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