Mechanical Behavior of Ballistically Damaged and Undamaged Laminar Composite Armor Steel.
ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MASS
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Mechanical behavior of ballistically damaged and undamaged laminar composite armor steel, also known as dual hardness steel, is presented. The effect of 1 projectile velocity, obliquity and type and 2 applied tensile stress during impact on ballistic damage and subsequent residual strength behavior is examined. Tensile properties characteristic of undamaged material are compared to residual strength values obtained on damaged specimens. Other base-line properties investigated are shear strength of the bond formed between the hard and soft sides high cycle fatigue behavior maximum stress - number of cycles to failure for several minimummaximum stress ratios the influence of environment and surface condition on fatigue behavior through-the-thickness hardness traverses providing information on surface decarburization and transition zone between the hard and soft layers of the composite. Author