Abstract
Modelling and analysis of underwater explosive forming process by using FEM and SPH formulation is presented in this work. The explosive forming of a steel cone is studied. The model setup includes a low carbon steel plate, plate holder, forming die as well as water and C4 explosive.The effect of multiple explosives on rate of targets deformation has been studied. Four different multi-explosives models have been developed and compared to the single explosive model. The formability of the steel plate based on forming limit failure criteria has been investigated. Aspects such as shape of plates deformation and thickness of the plate during the forming process have been examined.The model results indicate that a multi-explosives model does not always guarantee a faster rate of target deformation without central explosive. On the other hand the model results indicate that the multi-explosives setup is capable of preventing crack failure of the steel plate during the forming process which would occur if a single explosive model was used.
Highlights
Explosive forming is based on releasing a high amount of energy in a short time into a surrounding environment, creating a shock wave which travels through an energy transfer medium and reaching the work piece, results in the deformation of the work piece
Water will be used as the energy transfer medium, and a C4 explosive as explosive charge
The water particles interact with the workpiece, die and plate holder through a node to surface contact algorithm, the plate and forming die interact through a surface to surface contact algorithm, and the clamping of the workpiece by the plate holder is handled through a tied surface to surface contact
Summary
This content has been downloaded from IOPscience. Please scroll down to see the full text. Ser. 734 032074 (http://iopscience.iop.org/1742-6596/734/3/032074) View the table of contents for this issue, or go to the journal homepage for more. Download details: IP Address: 134.83.1.241 This content was downloaded on 13/10/2016 at 15:07 Please note that terms and conditions apply
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