PHASE TRANSITIONS, HIGH-RATE STRAINING, AND FRACTURE OF IRON UNDER SPHERICAL EXPLOSIVE LOADING

• Main Authors: Brichikov, S A, Dremov, V V, Kovalenko, G V, Kozlov, E A, Petrovtsev, A V, Varfolomeev, D A, Bragov, A M, Lomunov, A K, Dobromyslov, A V, Taluts, N I, Juanicotena, A, Gatulle, M, Voltz, C
• Format: Conference Proceeding
• Language: English
• ISSN: 0094-243X
• DOI: 10.1063/1.2833023

Processes in iron compressed in spherical systems are characterized by: a wide range of thermodynamic and straining parameters, polymorphous and other phase transitions, spall and shear fractures, and recompaction; widely varying deformation and energy accumulation in converging waves depending on loading amplitude and duration. So, spherical explosive experiments are an important source of information and a complex test for models. The paper provides information on iron models developed on the basis of the time- and space-resolved measurements in planar and wedge experiments and in mechanical tests. It presents results of numerical simulations of spherical recovery experiments where the size of spheres and loading parameters were varied. The features of deformation in different layers of the spheres and their dependence on the loading parameters, EOS, elastic-plastic behavior and fracture models were analyzed. Calculated results were compared with those of the material science investigation of recovered samples.