Investigation of the Fracture Characteristics of a Cement Mortar Slab under Impact Loading Based on the CDEM

doi:10.3390/ma16010207

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Investigation of the Fracture Characteristics of a Cement Mortar Slab under Impact Loading Based on the CDEM
	Zhang, Qunlei 4; Wang, Decai 4; Yue, Jinchao 3; Feng, Chun 2; Yuan, Ruifu 1
刊名	MATERIALS
	2023
卷号	16 期号:1 页码:15
关键词	cement mortar slab impact cracking CDEM hammerhead shape impact velocity
DOI	10.3390/ma16010207
通讯作者	Wang, Decai(wangdecai@ncwu.edu.cn)
英文摘要	For brittle and quasi-brittle materials such as rock and concrete, the impact-resistance characteristics of the corresponding engineering structures are key to successful application under complex service environments. Modeling of concrete-like slab fractures under impact loading is helpful to analyze the failure mechanism of an engineering structure. In this paper, simulation models of impact tests of a cement mortar slab were developed, and a continuum-discontinuum element method (CDEM) was used for dynamic analysis. Concretely, the cracking simulations of a mortar slab when considering the hammer shape and impact velocity were conducted, and the impact process and failure results of the slab structure were analyzed. The results showed that the top fracture area of the mortar slab was significantly smaller than that of slab bottom under impact loadings of the drop hammer. The impact velocity was an important factor that affected the mortar slab's cracking. With the increase in the initial impact velocity, the effective fracture area of the slab structure increased significantly; the impact force and rupture degree of the mortar slab also showed a linear growth trend. The shapes of the impact hammerhead also had a significant effect on the crack model of the mortar slab. The effective fracture zones of slab structures were close under circular and square hammers, while the effective fracture zone was significantly larger under a rectangular hammer impact. The peak value (45.5 KN) of the impact force under a circular hammer was significantly smaller than the peak value (48.7 KN) of the impact force under the rectangular hammer. When considering the influence of the stress concentration of the impact hammerhead, the maximum impact stress of the rectangular hammer was 147.3 MPa, which was significantly greater than that of the circular hammer impact (maximum stress of 87.5 MPa). This may have meant that the slab structures were prone to a directional rupture that mainly propagated along the long axis of the rectangular hammerhead. This impact mode is therefore more suitable for rehabilitation and reconstruction projects of slab structures.
资助项目	National Key Research and Development Program of China[2018YFC1505504] ; National Natural Science Foundation of China[52174109] ; Key Research and Development Project of Henan Province[222102320407] ; Program for Innovative Research Team (in Science and Technology) in University of Henan Province[22IRTSTHN005] ; Science and Technology Collaborative Innovation Special Project of Zhengzhou ; Science and Technology Collaborative Innovation Special Project of Zhengzhou, Henan Province
WOS关键词	REINFORCED-CONCRETE SLABS ; RESISTANCE ; HAMMER ; WEIGHT
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
语种	英语
WOS记录号	WOS:000909008700001
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Key Research and Development Project of Henan Province ; Program for Innovative Research Team (in Science and Technology) in University of Henan Province ; Science and Technology Collaborative Innovation Special Project of Zhengzhou ; Science and Technology Collaborative Innovation Special Project of Zhengzhou, Henan Province
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/91430]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
通讯作者	Wang, Decai
作者单位	1.Henan Polytech Univ, Sch Energy Sci & Engn, Jiaozuo 454003, Peoples R China 2.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 3.Zhengzhou Univ, Sch Water Conservancy & Environm, Zhengzhou 450001, Peoples R China 4.North China Univ Water Resources & Elect Power, Sch Civil Engn & Commun, Zhengzhou 450045, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Qunlei,Wang, Decai,Yue, Jinchao,et al. Investigation of the Fracture Characteristics of a Cement Mortar Slab under Impact Loading Based on the CDEM[J]. MATERIALS,2023,16(1):15.
APA	Zhang, Qunlei,Wang, Decai,Yue, Jinchao,Feng, Chun,&Yuan, Ruifu.(2023).Investigation of the Fracture Characteristics of a Cement Mortar Slab under Impact Loading Based on the CDEM.MATERIALS,16(1),15.
MLA	Zhang, Qunlei,et al."Investigation of the Fracture Characteristics of a Cement Mortar Slab under Impact Loading Based on the CDEM".MATERIALS 16.1(2023):15.