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ASSESSMENT OF DYNAMIC FRACTURE PROPAGATION RESISTANCE
FACTORS AFFECTING THE DESIGN OF MILITARY AIRCRAFT
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alloy analysis applied arrest ASTM Bykovtsev calculated Charpy component constant crack branching crack curving crack extension crack initiation crack length crack propagation crack tip creep criterion cycles cyclic damage defects deformation determined displacement ductile dynamic crack dynamic stress effect elastic energy equation evaluation experimental failure Fatigue CTOD test FCP test finite element finite element analysis flaw fracture mechanics fracture toughness frequency fringe function high strain impact Inspection KEYWORDS linear linear elastic load machine martensitic material maximum measured metal method mixed mode notch obtained parameters photoelastic plane plane strain plastic zone plate plotted precracked predicted projectile Ramulu ratio rupture shear band shear stress shown in Fig shows specimen geometry static steel strain amplitude strain rate strength stress distribution stress field stress intensity factor stretch zone structure surface Table temperature tensile test pieces thickness values velocity wave weld joint yield yield strength yield stress