Work

Target effects on Coral Aggregate Seawater Concrete penetration: 3D meso-scale study of aggregate-induced projectile deflection

Year: 2025

Type: article

Abstract: The dynamic response of Coral Aggregate Seawater Concrete (CASC) to projectile penetration remains poorly understood. This study employs 3D mesoscopic simulations to decipher the individual and synergistic roles of aggregate strength, particle size, volume fraction, and mortar strength. Results demonstrate that enhanced aggregate strength significantly reduces penetration depth and increases deflection angles. Mortar strength exhibits a non-monotonic influence on deflection, initially increasing and subsequently decreasing the angle. A critical aggregate-to-projectile size ratio of 3 is identified, corresponding to the maximum penetration depth. Furthermore, an increase in aggregate volume fraction paradoxically increases penetration depth while reducing deflection, with the highest fraction (40 %) facilitating direct penetration. Crucially, the aggregate type is paramount: weaker coral aggregates permit straightforward penetration, whereas stronger ones induce significant trajectory deviation. These findings provide valuable insights into optimizing CASC for improved penetration resistance, with implications for enhancing the protective capabilities of coastal and island infrastructure against high-velocity impacts.

Source: Case Studies in Construction Materials

DOI: 10.1016/j.cscm.2025.e05576

Authors: Haiyan Ma, Jianbo Guo, Hongfa Yu, Jinhua Zhang, Qiquan Mei

Institutions: Jishou University, Suzhou University of Science and Technology, Nanjing University of Aeronautics and Astronautics, Sanjiang University

Language: English

Topic: High-Velocity Impact and Material Behavior

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,660

Funder: National Natural Science Foundation of China