This work presents a numerical simulation of ballistic penetration and high velocity impact behavior of plain and reinforced concrete slabs.In this paper,we focus on the comparison of the performance of the plain and ...This work presents a numerical simulation of ballistic penetration and high velocity impact behavior of plain and reinforced concrete slabs.In this paper,we focus on the comparison of the performance of the plain and reinforced concrete slabs of unconfined compressive strength 41 MPa under ballistic impact.The concrete slab has dimensions of 675 mm x 675 mm x 200 mm,and is meshed with 8-node hexahedron solid elements in the impact and outer zones.The ogive-nosed projectile is considered as rigid element that has a mass of 0.386 kg and a length of 152 mm.The applied velocities vary between 540 and 731 m/s.6 mm of steel reinforcement bars were used in the reinforced concrete slabs.The constitutive material modeling of the concrete and steel reinforcement bars was performed using the Johnson-Holmquist-2 damage and the Johnson-Cook plasticity material models,respectively.The analysis was conducted using the commercial finite element package Abaqus/Explicit.Damage diameters and residual velocities obtained by the numerical model were compared with the experimental results and effect of steel reinforcement and projectile diameter were studies.The validation showed good agreement between the numerical and experimental results.The added steel reinforcements to the concrete samples were found efficient in terms of ballistic resistance comparing to the plain concrete sample.展开更多
基金he first author would like to acknowledge the Deutscher Akademischer Austauschdienst(DAAD)for the financial support of this work.The first author dedicates this work to the memory of his coworker Dr.Kheira OuzaaThe second author would like to acknowledge the RISTEK-DIKTI(Directorate General of Resources for Science,Technology and Higher Education.Ministry of Research,Technology and Higher Education of Indonesia)under funding agreement No.153.39/E4.4/2014.
文摘This work presents a numerical simulation of ballistic penetration and high velocity impact behavior of plain and reinforced concrete slabs.In this paper,we focus on the comparison of the performance of the plain and reinforced concrete slabs of unconfined compressive strength 41 MPa under ballistic impact.The concrete slab has dimensions of 675 mm x 675 mm x 200 mm,and is meshed with 8-node hexahedron solid elements in the impact and outer zones.The ogive-nosed projectile is considered as rigid element that has a mass of 0.386 kg and a length of 152 mm.The applied velocities vary between 540 and 731 m/s.6 mm of steel reinforcement bars were used in the reinforced concrete slabs.The constitutive material modeling of the concrete and steel reinforcement bars was performed using the Johnson-Holmquist-2 damage and the Johnson-Cook plasticity material models,respectively.The analysis was conducted using the commercial finite element package Abaqus/Explicit.Damage diameters and residual velocities obtained by the numerical model were compared with the experimental results and effect of steel reinforcement and projectile diameter were studies.The validation showed good agreement between the numerical and experimental results.The added steel reinforcements to the concrete samples were found efficient in terms of ballistic resistance comparing to the plain concrete sample.
