Dynamic Failure Behavior of Naval Structural Steels
Final rept. 1 Aug 96-30 Sep 98
GEORGIA TECH RESEARCH CORP ATLANTA
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The objective of this two year research is to 1 characterize the dynamic constitutive behavior of structural metals including HY-80, HY-100, HSLA-80, HSLA-100, 4340 and Ti-6A1-4V 2 evaluate the factors that determine their dynamic shear failure resistance and 3 obtain experimental quantification of the failure resistance of these materials. A combined experimental and numerical approach has been employed in the investigation. The work carried out consists of experimental characterization of failure behavior and numerical simulations. Specific accomplishments are 1 the responses of the above materials over a wide range of strain rate of 0001 to 10000 per sec have been characterized 2 the dynamic shear failure resistances of these materials have been experimentally characterized and 3 a novel Cohesive Finite Element Method CFEM has been developed for the modeling of dynamic shear failure, accounting for microscopic rupture as well as thermomechanical response. Numerical simulations have been carried to illustrate the failure behavior and failure mechanisms. This accomplishment exceeded the initial scope of tasks.
- Properties of Metals and Alloys