https://scholars.lib.ntu.edu.tw/handle/123456789/576111
標題: | Breakage behavior of gravel rock particles under impact force | 作者: | Zhao H Liu C Zhang J Ge L. YU-NING GE |
公開日期: | 2021 | 來源出版物: | Computational Particle Mechanics | 摘要: | To investigate the rock particle breakage behavior subject to impact load, a series of split Hopkinson pressure bar (SHPB) tests were conducted on selected Nishan rock and Shoushan rock particles within gravel size range at different strain rates. Both rock particles exhibit a typical strain softening macrobehavior and their dynamic peak strengths increase with strain rate. A dynamic increasing factor (DIF) is used to describe this strain rate effect. Based on the SHPB test, a constitutive model is proposed for the two types of rock particles to describe their dynamic stress–strain behavior considering strain rate effect and damaging effect. Grain size distribution of fractured rock particles was analyzed, which reflected the fragmentation characteristics quantitatively. A fractal theory was used to describe the fragmentation characteristics and dynamic strength of both types of rock particles. Dynamic strength was found to vary differently with fractal dimension for Nishan rock and Shoushan rock. ? 2021, OWZ. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85101770735&doi=10.1007%2fs40571-021-00393-2&partnerID=40&md5=3fa5e3ce4c6e7197e90325620a5e3b6c https://scholars.lib.ntu.edu.tw/handle/123456789/576111 |
ISSN: | 21964378 | DOI: | 10.1007/s40571-021-00393-2 |
顯示於: | 土木工程學系 |
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