This paper presents numerical analysis result of forming characteristics of Ta explosively formed penetrator (EFP) according to various material models and their values. Dynamic material properties of Ta were measured with static tensile testing machine and Hopkinson pressure bar tests. We used AUTODYN hydrodynamic code to simulate these phenomena. We used three material models, such as Von-Mis...

In order to quantitatively study the penetration capability of depleted uranium alloy, a simulation model bullet impact on target plate with FEM-SPH coupling algorithm was established by using LS-DYNA software, which combined Johnson-Cook intrinsic model, fracture criterion, and equation state conduct alloy bullets made tungsten high-strength steel penetrate at 1400 m/s initial velocity. The re...

In this research, finite element analysis of the conventional drilling and vibration assisted drilling is carried out. The ABAQUS software is employed for FE analysis. The Johnson-Cook models for both plastic deformation and damage are employed for FE simulation.The results of the FE analysis are then verified with experimental results in both conventional and vibration assisted drilling on Al ...

Abstract In order to study the ignition characteristic of PTFE-based reactive materials (RMs), Al/W/PTFE RMs with different W powder contents were prepared and split Hopkinson pressure bar (SHPB) test was carried out under loading conditions. The temperature rise three calculated theoretically. material model parameters formulations by using mixture equation state theory Johnson-cook model, imp...

Although several schemes have been proposed to modify the classical Johnson–Cook (J-C) model, effect of temperature on flow stress materials at different temperatures has not clarified. In current study, investigate deformation behavior Ti-22Al-23Nb-2(Mo, Zr) alloy temperatures, uniaxial tension experiments were performed both room (RT, 28 °C) and elevated a modified J-C model was developed des...

Abstract This paper takes the 35mm armor-piercing projectile as research object, and uses ANSYS LS-DYNA dynamic analysis platform to simulate process of penetrating armored steel plate under different rotation speeds by using Johnson-Cook constitutive model. The results show that speed has a certain influence on penetration performance projectile: will have effects contact stress target in late...

In order to study the dynamic mechanical properties at high temperature and strain rate [1] of Q245R steel after corrosion, electrochemical accelerated corrosion test by constant current method tensile [2] High Temperature Synchronous Hopkinson Tensile device were carried out. The results show that has obvious strengthening effect softening effect, under certain conditions, becomes main factor ...

electromagnetic forming is a high energy rate forming process. in this process, an electromagnetic lorentz body force is used for deformation of products. in this article, electromagnetic forming process was simulated for assembly of parts as an innovative method. in this research work, the effect of important parameters of process such as discharge energy, radius and width of rectangular groov...