Failure behavior of projectile abrasion during high-speed penetration into concrete

• Published in: Engineering failure analysis 2020-09, Vol.115, p.104634, Article 104634
• Main Authors: Ning, Jianguo, Li, Zhao, Ma, Tianbao, Xu, Xiangzhao
• Format: Article
• Language: English
• Subjects: Concrete target; Coupled melting-cutting abrasion model; Mass abrasion; Penetration
• ISSN: 1350-6307; 1873-1961
• DOI: 10.1016/j.engfailanal.2020.104634

•A coupled melting-cutting abrasion model is proposed to investigate the mass loss.•Results predicted by the coupled abrasion model agree well with experimental data.•Effects of the coupled model parameters on penetration performance are discussed. The mass abrasion of projectile is an obvious failure phenomenon because of mass loss and nose blunting during the high-speed projectile deep penetration into concrete target. The thermal melting and cutting by aggregate on projectile outer surface are the main mechanisms of mass abrasion according to the experimental observation. In this paper, a coupled melting-cutting model is constructed to estimate mass abrasion and dynamic behavior of ogive-nose projectile during penetration. In this model, the abrasion volume of melting and cutting are obtained by two-dimensional heat conduction equation and a classic abrasive theory including a parameter that related to aggregate strength, respectively. Furthermore, the two mechanisms of mass abrasion interact with each other and are connected by the Johnson–Cook model. Finally, the penetration performance parameters, i.e., depth of penetration, variation of projectile shape and mass loss rate, can be obtained by the iteration calculation based on coupled abrasion model. The theoretical predictions agree well with the typical experimental data. Besides, the effects of the model parameters on the penetration performance are discussed.