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1. Experimental Investigation of concrete under Moderate Dynamic Loading | |||
DONG Lixin,XU Shilang | |||
Mechanics 26 December 2013 | |||
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Abstract:This paper presents the recent results of experimental investigations under dynamic loading aimed at disclosing the loading rate effect (mainly related to seismic loading range) on crack propagation in quasi-brittle fracture. Twenty four wedge-splitting tests were conducted using a servo-hydraulic machine under loading rates ranged from 0.001 mm/s to 10 mm/s. Strain gauges were mounted along the ligament of the specimen to measure the crack velocity and the crack propagation. Several important results were gained through the experimental investigations in this paper | |||
TO cite this article:DONG Lixin,XU Shilang. Experimental Investigation of concrete under Moderate Dynamic Loading[OL].[26 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4577394 |
2. The Simulation of crack propagation with Discrete Element Method | |||
Xia Shengxu ,Yu Tiantang | |||
Mechanics 26 October 2009 | |||
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Abstract:In this paper, the discrete element method (DEM) was used to study how cracks propagate in rocks subjected to a uniaxial compressive stress. In order to obtain immediate response to the loading, the convergence of DEM is firstly discussed with respect to the mass scaling method. Secondly, the bonded crack propagation criterion based on Mohr-Coulomb criterion is suggested. Thirdly, the DEM results were compared with those obtained in laboratory samples. The laboratory tests used rock samples with two cracks inclined at varying angles with respect to the compressive stress. The DEM and the laboratory results compared very well. Also, the results show that the DEM is a very successful approach for the visualization of secondary crack formations and its propagation in the simulated samples. | |||
TO cite this article:Xia Shengxu ,Yu Tiantang . The Simulation of crack propagation with Discrete Element Method[OL].[26 October 2009] http://en.paper.edu.cn/en_releasepaper/content/36127 |
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