Numerical study of the mechanism of explosive/impact welding using Smoothed Particle Hydrodynamics method

Wang, Xiao; Yang, Zheng; Liu, Huixia; Shen, Zongbao; Hu, Yang; Li, Wei; Gao, Yangyang; Guo, Chao

doi:10.1016/j.matdes.2011.09.047

Cited by 106 publications

(40 citation statements)

References 18 publications

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“…Li et al [11] investigated the impact process using the smoothed particle hydrodynamics (SPH) method and concluded that explosive welding can also be regarded as diffusion welding, fusion welding and pressure welding. Wang et al [12] also simulated the impact process by SPH method, and confirmed that explosive welding is more likely to be a solid state welding. Chen et al [13] simulated atomic diffusion behavior using molecular dynamics, and demonstrated a hybrid method of calculating the diffusion layer.…”

Section: Introductionmentioning

confidence: 91%

“…It is generally regarded as a solid phase process, in which the bonding is achieved by the oblique high-speed collision between the flyer plate and the base plate through explosive detonation [11,12]. This technique enables to clad very large section of plates in a single operation and allows us to fabricate large scale composite laminates.…”

Section: Introductionmentioning

confidence: 99%

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Numerical simulation of explosive welding using Smoothed Particle Hydrodynamics method

Feng

Chen

Zhou

et al. 2017

IJM

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Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Numerical simulation of explosive welding using Smoothed Particle Hydrodynamics method

Feng

Chen

Zhou

et al. 2017

IJM

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“…A jet is expected to be generated, which will remove the oxidized surface layer and produce two fresh surfaces by the oblique impact. Then solid state bonding can be obtained under the great impact pressure and plastic shear deformation in the interface [22][23][24][25]. The whole process is completed in microseconds [14].…”

Section: Mechanism Of Laser Impact Spot Weldingmentioning

confidence: 99%

“…As a result, bonding was obtained [22]. Moreover, most of the researchers believed that the jet must be present in the welding process in order to achieve successful welding [23][24][25]. So, it is suggested that jetting formation was one of the conditions for the occurrence of LISW of Ti and Cu.…”

Section: Microstructurementioning

confidence: 99%

Investigation on a Novel Laser Impact Spot Welding

Liu

Gao

Zhang

et al. 2016

Metals

Self Cite

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Abstract:In this paper a novel laser impact spot welding (LISW) method is described, in which a hump was formed on the flyer plate on the intended welding spot location by local pre-forming. When the flyer and base plates were placed together to perform welding, the two plates kept in contact over their entire surfaces except at the hump, where a local air gap was enough to guarantee the impact velocity and collision angle to achieve spot welding using laser pulse energy. The presented approach was implemented to join thin titanium foils to copper foils under low laser energy system. Joints with regular shapes were obtained. The microstructure in the weld interface was studied with scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). It was found that the jetting occurred at the central region of the weld spots due to oblique impact. Wave features were observed in the weld interfaces. The impact energy was found to have significant influence on the wave's characteristics. Moreover, SEM images and EDS analysis did not show apparent element diffusion across the weld interface. Besides, the lap shearing test was used to characterize the mechanical properties of the spot welded joints.

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“…However, the phenomenon of jetting was only reproduced in the simulation by using the SPH method. Wang et al [7] applied the SPH method to study the mechanisms and the physical phenomenon of the explosion welding of titanium and its alloys. In their simulations, the changing physical processes involving shear stress and effective plastic strain of materials were clearly shown.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Ti/Al Bimetal Composite Fabricated by Explosive Welding

Liu

et al. 2017

Metals

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Abstract:In this paper, a 2D numerical model that is more physically realistic was established to simulate the complete process of Ti/Al explosive welding. Basing on the ANSYS/AUTODYN software package, the smoothed particle hydrodynamics (SPH) and arbitrary Lagrangian-Eulerian (ALE) were used for running this simulation. The numerical model can capture the typical physics in the explosive welding process, including the expansion of explosives, flyer plate bending, the impact of metal plates, jetting, and the wavy interface. The variable physical parameters during the explosive welding process were discussed. Most parts of the jet originated from the aluminum plate. According to the model, the jet velocity reached 7402 m/s. The pressure at the detonation point was too small to make the two plates to bond. The pressure could reach an order of magnitude of 10 7 kPa when the detonation energy tended to be stable and was far more than the yield strength of both materials, which resulted in an obvious narrow region of plastic strain emerging close to the collision zone. The signs of shear stresses between the two plates were the opposite. The interface morphology changed from straight to wave along the propagation of the detonation wave in the simulation, which was consistent with the experimental results.

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Numerical study of the mechanism of explosive/impact welding using Smoothed Particle Hydrodynamics method

Cited by 106 publications

References 18 publications

Numerical simulation of explosive welding using Smoothed Particle Hydrodynamics method

Numerical simulation of explosive welding using Smoothed Particle Hydrodynamics method

Investigation on a Novel Laser Impact Spot Welding

Numerical Simulation of Ti/Al Bimetal Composite Fabricated by Explosive Welding

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