International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 04 Issue: 05 | May -2017 www.irjet.net p-ISSN: 2395-0072 © 2017, IRJET | Impact Factor value: 5.181 | ISO 9001:2008 Certified Journal | Page 1378 NUMERICAL SIMULATION OF EXPLOSIVE WELDED STEEL WITH ALUMINUM USING AUTODYN 2D Suraj Srivastava 1 , Bir Bahadur Sherpa 2 , Gurjeet Singh 3 , P.J. Singh 3 Abhishek Upadhyay 2 and Niraj Srivastava 2 1 PG Student, PEC University of Technology, Sector-12, Chandigarh-160012, India 2 Terminal Ballistics Research Laboratory, Sector-30, Chandigarh-160030, India 3 PEC University of Technology, Sector-12, Chandigarh-160012, India ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract - Explosive welding is the process in which a controlled energy of an explosive is used to generate a metallic bond between the same or different material. In this paper different material has been taken for simulation i.e. Aluminum plate as flyer plate and Mild steel as base plate. The simulation has been carried out using AUTODYN 2D, where various study such as flyer plate velocity, detonation velocity, pressure, effective plastic strain, temperature distribution across the material has been taken into consideration. There is different equation of state and strength model involved in the simulation process. JWL equation of state was used to study the effect of explosive material and Johnson cook for the mechanical behavior. Different graph has been plot against the parameters to shows the behavior of the materials with time, with the help of this simulation many factor can be correlated and find the feasible output of the process. Key Words: Explosive welding, ANFO, JWL, Mechanical, Plastic behavior. 1. INTRODUCTION The Explosive welding is a well-define for its credential to directly join a wide heterogeneity of same and different metals combinations which cannot be join by any other convention methods. The set-up of the explosive welded plate is shown in the (figure 1), where the two plates to be join is placed parallel to each other separated by some distance called stand-off distance. In this process the flyer plate collides with such a high impact pressure that it forms a strong metallurgical bond between the two plates [1-2]. Fig. 1. Layout of Explosive Welding Different types of energy assign, concentration, conversion and disbursement generate on the surface contact constantly. The explosion vibe (welding) is a complete phenomenon in a wink as the process happens in a very few microseconds. Development and theoretical studies on explosive welding has been reported in the literature. In papers [3–7] authors have mention few research methods and results that previous researchers have used. Method of finite element (FEM) and the jetting phenomenon was arithmetically reproduced by [8]. Different testing and microhardness near the interface has been studied [9] experimentally which shows that hardness increase from the interface. The welded sample Interface wave was generated and arithmetical results agreed with the results development [10], but there is no any Performa of jetting propagate. Moreover, it is assumed that uniform or non-uniform flow of shear distribution was introduced in both the flyer and base plates. The tensile test of the welded sample has also been evaluated to check the strength of the welded specimen [11]. The flow of shear distribution was similar to the wake behind interference in fluid and the modeling was accomplished based on the hypothesis. In the paper [8–10] author have considered the solver of SPH processor. The materials at the point of collision were considered to behave like a wave, the straight wavy interfaces and jetting phenomena has been modeled, and the magnitude of the waves and velocity of jet were predicted. Furthermore, SPH computation can always be applicable for the plate impact but historical process understanding is to be difficult. EULER is a numerical grid or mesh Lagrangian hydrodynamics process and also using particles, unlike conventional Lagrangian techniques, it can also be applied to the astronomical science, hypervelocity strike and super-fast large deformation problems. EULER method to model the process of explosive welding was used by [12]. However, due to the explosion welding is a vast and complicated process; the physical phenomenon and a lot of mechanisms need to be researched thoroughly.