Analysis on particle breakage processes of granular materials
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Abstract:
The discrete element method w as employ ed to generate the cluster of par ticles with equal size, w hich wer e composed of the part icles of smaller sizes. T he part icles wer e bo nded to gether in t he fo rm of par allel bonding . T he biax ial compression tests wer e per formed for the rounded cluster of particles under two differ ent arr ang ement patterns to inv estigate the particle breakag e pr ocesses and the formatio n and development of shear band under different latera l stresses. The results show ed that the sample par ticles first slip and rot at e and then crush w hen the lateral str ess is low, and dilatio n and lat eral ex trusion occur for the dense arr ang ement o f particles; and the particles near bo th ends o f the sample fir st slide and rotat e slightly and then break up w hen the later al stress is hig h, and pro pag ate to the middle of the sample to fo rm the shear band event ually .
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