Benefits of Using Lode Angle Dependent Fracture Models to Predict Ballistic Limits of Armor Steel

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Abstract

Ductile fracture experiments are carried out at different stress states, strain rates and temperatures on a range of flat Mars 300 steel specimens to calibrate both a plasticity and a fracture model. To predict the onset of fracture a stress state and strain rate-dependent Hosford-Coulomb fracture initiation model is used. Single material impact experiments are performed on targets of homogenous and perforated Mars 300 plates by accelerating cylindrical Mars 300 impactors in a single-stage gas gun. It is shown that the chosen modeling approach allows accurate modeling of the plastic response as well as the fracture patterns.

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Roth, C. C., Fras, T., Faderl, N., & Mohr, D. (2018). Benefits of Using Lode Angle Dependent Fracture Models to Predict Ballistic Limits of Armor Steel. In EPJ Web of Conferences (Vol. 183). EDP Sciences. https://doi.org/10.1051/epjconf/201818301052

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