J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 443-448
Application of Goldthorpe PDF model to dynamic fracture. Applications using the GRIM Eulerian hydrocodeI.G. Cullis1, P.D. Church1, R. Townsley1, P. Greenwood1 and W.G. Proud2
1 QinetiQ Ford Halstead, Sevenoaks, Kent TN14 7BP, UK
2 Physics and Chemistry of Solids, Cavendish Laboratory, Cambridge CB3 0HE, UK
Published online: 26 July 2006
The Goldthorpe Path Dependent Failure (PDF) model has been incorporated into the GRIM Eulerian hydrocode and has been applied to a number of dynamic fracture scenarios. The model has allowed a step change improvement in the simulation of fracture processes in an Euler scheme. The applications include shear plugging of a plate due to ballistic impact, prediction of the so-called V50 for a small mass projectile and the impact of a generic EFP against an aluminium plate target. It has been noted that the prediction of temperature in hydrocodes, still requires more effort, particularly when materials approach the melt point. In addition there is also significant batch to batch variation in the fracture properties in materials, which needs to be taken into account when simulating a given application scenario. The paper discusses these points and recognises that GRIM is now an integral part of the design process for new ballistic designs.
© EDP Sciences 2006