Ballistic penetration of steel plates

Perforation of 12 mm thick steel plates by 20 mm diameter projectiles with flat, hemispherical and conical noses: Part I: Experimental study

The object of this paper is to provide a critical review of the current state of plasticity in the presence of finite deformation. In view of the controversy regarding a number of fundamental issues between several existing schools of plasticity, the areas of agreement are described separately from those of disagreement. Attention is mainly focussed on the purely mechanical, rate-independent, theory of elastic-plastic materials, although closely related topics such as rate-dependent behavior, thermal effects, experimental and computational aspects, microstructural effects and crystal plasticity are also discussed and potentially fruitful directions are identified. A substantial portion of this review is devoted to the area of disagreement that covers a detailed presentation of argument(s), bothpro andcon, for all of the basic constitutive ingredients of the rate-independent theory such as the primitive notion or definition of plastic strain, the structure of the constitutive equation for the stress response, the yield function, the loading criteria and the flow and the hardening rules. The majority of current research in finite plasticity theory, as with its infinitesimal counterpart, still utilizes a (classical) stress-based approach which inherently possesses some shortcomings for the characterization of elastic-plastic materials. These and other anomalous behavior of a stress-based formulation are contrasted with the more recent strain-based formulation of finite plasticity. A number of important features and theoretical advantages of the latter formulation, along with its computational potential and experimental interpretation, are discussed separately.

/pdf/a-critical-review-of-the-state-of-finite-plasticity-3k1t67dfxi.pdf

A critical review of the state of finite plasticity

http://www.ciar.org/ttk/mbt/papers/papers.2007-12-21/armor.x.ijie.vol27pp037_064.perforation_of_12mm_thick_steel_plates_by_20mm_diameter_projectiles_with_flat_hemispherical_and_conical_noses_part_2_numerical_simulations.borvik_langseth_hopperstad_berstad.2002.pdf

Perforation of 12 mm thick steel plates by 20 mm diameter projectiles with flat, hemispherical and conical noses: Part II: numerical simulations

http://www.ciar.org/~ttk/mbt/papers/ijie00/ijie_28_413.pdf

S.R. Bodner

Papers

Dynamic perforation of viscoplastic plates by rigid projectiles

A constitutive model for the deformation induced anisotropic plastic flow of metals

Comments on anisotropic plastic flow and incompressibility

Dynamic response of a slab of elastic-viscoplastic material that exhibits induced plastic anisotropy☆

A hardness law for inelastic deformation