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| 1 | Damage modeling of ballistic penetration and impact behavior of concrete panel under low and high velocities显示文摘This work presents a numerical simulation of ballistic penetration and high velocity impact behavior of plain and reinforced concrete panels.This paper is divided into two parts.The first part consists of numerical modeling of reinforced concrete panel penetrated with a spherical projectile using concrete damage plasticity(CDP)model,while the second part focuses on the comparison of CDP model and Johnson-Holmquist-2(JH-2)damage model and their ability to describe the behavior of concrete panel under impact loads.The first and second concrete panels have dimensions of 1500 mm1500 mm150 mm and 675 mm675 mm200 mm,respectively,and are meshed using 8-node hexahedron solid elements.The impact object used in the first part is a spherical projectile of 150 mm diameter,while in the second part steel projectile of a length of 152 mm is modeled as rigid element.Failure and scabbing characteristics are studied in the first part.In the second part,the comparison results are presented as damage contours,kinetic energy of projectile and internal energy of the concrete.The results revealed a severe fracture of the panel and high kinetic energy of the projectile using CDP model comparing to the JH-2 model.In addition,the internal energy of concrete using CDP model was found to be less comparing to the JH-2 model. | Chahmi Oucif J.S.Kalyana Rama K.Shankar Ram Farid Abed | 2021 | Defence Technology(防务技术)2021，17，1： | 2 |
| 2 | Application of a weakly compressible smoothed particle hydrodynamics multi-phase model to non-cohesive embankment breaching due to flow overtopping显示文摘 | Rasoul MEMARZADEH Gholamabbas BARANI Mahnaz GHAEINI-HESSAROEYEH | 2018 | Frontiers of Structural and Civil Engineering2018，12，3： | 1 |
| 3 | Ballistic behavior of plain and reinforced concrete slabs under high velocity impact显示文摘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. | Chahmi OUCIF Luthfi Muhammad MAULUDI Farid Abed | 2020 | Frontiers of Structural and Civil Engineering2020，14，2： | 0 |
| 4 | 钨合金破片侵彻钢靶的穿靶能量研究显示文摘为了探讨钨合金破片对Q235钢靶的侵彻效应,本文研究了在一定弹靶系统下,破片穿靶所需能量随破片入靶速度的变化关系。采用AUTODYN有限元分析软件数值模拟了钨合金球形破片侵彻钢板,得到穿靶能量随破片速度的变化规律,同时获得了钨合金球形破片侵彻钢板的开坑直径随破片速度的变化规律。在此基础上,通过使用量纲分析的方法,获得了球形破片侵彻靶板的入靶速度与穿靶能量的关系式,并用不同速度的破片进行穿靶试验。研究表明:随侵彻速度的增大,穿靶所需能量增大,且获得的试验值与计算值具有较好的一致性,研究结果具有一定的应用价值。 | 洪豆 郑宇 李文彬 李一鸣 姜宁 | 2023 | 哈尔滨工程大学学报2023，44，8： | 0 |
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