Distributed-Spring Edge-to-Edge Contact Model for Two-Dimensional Discontinuous Deformation Analysis

Zhang, Yingbin; Zhang, Yingbin; Peng, Xinyu; Chen, Guangqi; Zhao, John X.

doi:10.1007/s00603-019-01917-2

Cited by 22 publications

(1 citation statement)

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“…DDA was proposed by Shi [35]; it aims to analyze the evolution of blocky systems. Many studies involving DDA have been conducted since it has been proposed [36][37][38][39][40][41][42][43]. DDA has a complete theory about contacts and mechanics involving polygonal blocks, which is clearly suitable for crack propagation study.…”

Section: Introductionmentioning

confidence: 99%

Efficient Investigation of Rock Crack Propagation and Fracture Behaviors during Impact Fragmentation in Rockfalls Using Parallel DDA

Zheng

et al. 2021

Advances in Civil Engineering

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The study of the rock crack propagation and fracture behaviors during impact fragmentation is important and necessary for disaster evaluation of rockfalls. Discontinuous Deformation Analysis (DDA) incorporating virtual joints can offer a powerful tool to solve such a problem. In the analysis process, the computational efficiency is critical because the mesh must be very dense to make crack propagation more realistic. Thus, parallel DDA using OpenMP is applied. The flattened and precrack Brazilian disc tests are first reproduced, respectively, to verify the accuracy and efficiency of the parallel DDA with virtual joints. Then, the impact fragmentation process is simulated and validated with corresponding laboratory experiments in terms of crack propagation results. Furthermore, the effects of joint-slope angle, joint connectivity rate, and impact velocity on rock fracture behaviors are investigated. It is concluded that the peak number of cracks occurs when the joint-slope angle ranges between 30° and 45°; the higher impact velocity and joint connectivity rate tend to cause more cracks and larger damages to the specimen.

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