Numerical modelling of the effect of using multi-explosives on the explosive forming of steel cones

10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes

De Vuyst, T.^1 ; Kong, K.^2 ; Djordjevic, N.^1 ; Vignjevic, R.^3 ; Campbell, J.C.^1 ; Hughes, K.^1

Brunei University London, Department of Mechanical, Aerospace and Civil Engineering, NSIRC, Granta Park, Great Abington, Cambridgeshire

CB21 6AL, United Kingdom^1

Cranfield University, School of Aerospace, Transport and Manufacturing, Bedfordshire, Cranfield

MK43 0AL, United Kingdom^2

Brunel University London, Department of Mechanical, Aerospace and Civil Engineering, Uxbridge

UB8 3PH, United Kingdom^3

关键词: Crack failure;    Failure criteria;    Faster rates;    Forming limits;    Low carbon steel plate;    Model results;    Modelling and analysis;    Underwater explosives;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032074/pdf
DOI  :  10.1088/1742-6596/734/3/032074

来源: IOP

【 摘 要 】

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.