A Model for Penetration Resistance in Brittle Materials Taking into Account Strain Hardening of Solid Phase in Mescal-zone Powder Material

A new analytical model is proposed for penetration resistance of brittle materials that takes into account strain hardening of solid phase of powder material in Mescal zone ahead of penetrator. The strengthening is taken into account by analogy with theories of deformation and compaction of powder materials with elastic-plastic solid phase. The model is an extension of the penetration resistance model proposed by authors earlier. Model performance is demonstrated by example calculation of penetration resistance for glass which at high pressures shows residual densification and increase of elastic modulus. Strain hardening of solid phase was shown to increase penetration resistance.