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标题：Energy transfer rules and damage characteristics analysis of layered mortar specimen under low-velocity impact
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作者：Yang Yang ; Xianglong Li ; Kegang Li 等
期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：304
期号：5
页码：1-7
DOI：10.1088/1755-1315/304/5/052068
出版社：IOP Publishing
摘要：The energy transfer rule and failure pattern of layered mortar specimen are helpful to analyze the seismic performance of layered structure. Split Hopkinson pressure bar equipment was used for one-dimensional impact tests of specimens with double fissures under low-velocity. Experimental results show that when the impact speed is lower than 5.26m/s, the energy consumption of the layered mortar specimens with a parallel fracture spacing of 18mm increases with the increase of the impact velocity. When the speed is increased from 5.26m/s to 6.04m/s, the energy consumption increases first and then decreases, and the impact velocity corresponding to the maximum value is determined by the physical and mechanical properties of the layered fracture of the specimen and the impact strength of the material. Within the low speed range of 3.38m/s~5.26m/s, damage variable presented an increase weak power function relationship with the increasing impact speed, meeting d = –10014.08e^−v/⁰³² + 0.83, and the damage value of the specimen was about 0.72. The results of this study provide a reference for the analysis of the dynamic characteristics of laminated cement mortar material in construction engineering.