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- W2290089413 abstract "Γ , MP, and the two surfaces S0 and Sf. We assume that there exist velocity discontinuities tangent to the surfaces S0 and Sf while the components of velocity normal to these surfaces are continuous. It follows that in the viscoplastic domain Dvisco, the only non-zero velocity component is the radial component. From the continuity equation in Dvisco, we obtain that the density in the viscoplastic domain is directly proportional to the inverse of the radius. Using the work-hardening law in conjunction with the radial compaction law for the material, the stress distribution in the viscoplastic domain is calculated. It is assumed that Coulomb friction law applies along the surface area of contact between the nose of the rigid projectile and the target. Along the surface area of contact between the compacted target material and the shank a slip-dependent friction law is considered. The resistance to penetration is calculated using the theorem of power expanded. Based on this analysis optimization of the wedge angle is performed. To illustrate the predictive capabilities of the model, its application to mortar is presented. The data available on mortar consists of laboratory quasi-static unconfined and confined compression tests for confining pressures in the range 50- 450 MPa under a strain rate of 10 -6 /s and both confined and unconfined Split-Hopkinson bar data at strain rates of 60/s to 160/s. The theoretical resistance to penetration b σ" @default.
- W2290089413 created "2016-06-24" @default.
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- W2290089413 date "2004-01-01" @default.
- W2290089413 modified "2023-09-26" @default.
- W2290089413 title "STEADY-FLOW OF A NON-HOMOGENEOUS BINGHAM MATERIAL OVER A WEDGE" @default.
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