文献类型：期刊文献

英文题名：Numerically investigating the cracking evolution paths and the fracture mechanisms of notched concrete materials under impact loading

作者：Niu, Yong[1,2];Xu, Kai[1,2];Zhong, Zhen[1,2];Hu, Yunjin[1,2];Liu, Bolong[1,2];Guo, Yanhui[3]

机构：[1]Shaoxing Univ, Key Lab Rock Mech & Geohazards, Shaoxing 312099, Zhejiang, Peoples R China;[2]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Zhejiang, Peoples R China;[3]Kunming Univ Sci & Technol, Fac Publ Safety & Emergency Management, Kunming 650093, Yunnan, Peoples R China

年份：2025

卷号：315

外文期刊名：ENGINEERING FRACTURE MECHANICS

收录：SCI-EXPANDED(收录号：WOS:001398211900001)、、EI(收录号：20250217671583)、Scopus(收录号：2-s2.0-85214497466)、WOS

基金：The present work is supported by the Zhejiang Natural Science Foundation (Grant No. QN25E090011) , National Key R&D Program "Intergovernmental International Science and Technology Innovation Cooperation" (Grant No. 2024YFE0105800) , the National Natural Science Foundation of China (Grant No. 42477216) , the Shaoxing Basic Public Welfare Planning Project (Grant No. 2022A13004) , the Zhejiang Natural Science Foundation (Grant No. LHZ21D020001) , which are gratefully acknowledgement.

语种：英文

外文关键词：Fracture; Failure mechanism; Concrete; Impact loading; Peridynamic

外文摘要：Predicting the fracture evolution paths and revealing the failure mechanism of concrete materials subjected to dynamic loading is crucial for formulating effective protective measures. In this paper, the kinematic-constraint-inspired non-ordinary state-based peridynamic (KC-NOSBPD) theory is applied to gain the evolution of cracking paths and stress fields of concrete materials under impact loading. In this approach, the bond-associated horizon size is memorably solved and the numerical oscillations of calculated results can be availably eliminated. The bond-associated stress-based failure criteria are utilized to decide the damage of concrete materials. The offset distance of notch controlled by the gamma-value heavily affects the cracking paths of notched concrete specimens. The critical transition value gamma t can be employed to distinguish the initiation position of cracks. The different loading rates obviously affect the crack propagation trajectories of U-shaped concrete specimens. A main crack dominates the cracking paths of specimens under low loading rates. The crack branching characteristics dominate the cracking paths of specimens under high loading rates. The cracking paths of concrete acquired by the present approach are comparable to those gained by the previous results. The stress concentration triggers the initiation of new cracks. The transfer of stress concentration drives the persistent growth of initiated cracks.