Modelling of the PELE fragmentation dynamics
conference paper
The Penetrator with Enhanced Lateral Effect (PELE) is a type of explosive-free projectile that undergoes radial fragmentation upon an impact with a target plate. This type of projectile is composed of a brittle cylindrical shell (the jacket) filled in its core with a material characterized with a large Poisson's ratio. Upon an impact with a target, the axial compression causes the filling to expand in the radial direction. However, due to the brittleness of the jacket material, very little radial deformation can occur which creates a radial stress between the two materials and a hoop stress in the jacket. Fragmentation of the jacket occurs if the hoop stress exceeds the material's ultimate stress. The PELE fragmentation dynamics is explored via Finite-Element Method (FEM) simulations using the Autodyn explicit dynamics hydrocode.
The numerical results are compared with an analytical model based on wave interactions, as well as with the experimental investigation of Paulus and Schirm (1996). The comparison is based on the mechanical stress in the filling and the qualitative fragmentation of the jacket.
The numerical results are compared with an analytical model based on wave interactions, as well as with the experimental investigation of Paulus and Schirm (1996). The comparison is based on the mechanical stress in the filling and the qualitative fragmentation of the jacket.
Topics
ProjectilesContinuum mechanicsFinite element methodFracture mechanicsProjectilesResidual stressesSemiconductor insulator boundariesCylindrical shellExperimental investigationsFinite-element method (FEM) simulationFragmentation dynamicsMechanical stressNumerical resultsPenetrator with enhanced lateral effectsRadial deformationDynamics
TNO Identifier
502121
ISSN
1742-6596
Publisher
Institute of Physics Publishing
Article nr.
152015
Source title
Journal of Physics: Conference Series 500 (2014)
18th Biennial International Conference of the APS Topical Group on Shock Compression of Condensed Matter, APS-SCCM 2013 in Conjunction with the 24th Biennial International Conference of the International Association for the Advancement of High Pressure Science and Technology, AIRAPT 2013, Seattle, WA, USA, 7-12 July 2013
18th Biennial International Conference of the APS Topical Group on Shock Compression of Condensed Matter, APS-SCCM 2013 in Conjunction with the 24th Biennial International Conference of the International Association for the Advancement of High Pressure Science and Technology, AIRAPT 2013, Seattle, WA, USA, 7-12 July 2013
Collation
7 p.