a b c d Fig. 11. Copper structure: (a) - in an initial condition; (b) - after loading with the period of T=1µs (S=0,03mm2); (c) – sample with a cut after loading with the period of T=1µs (S = 0,08 mm2); (d) - sample with a cut after loading with the period of T=1µs (S = 0,08 mm2). Designations: grain – the recrystallized grains, band – shift strips. 4. Results comparison of static and dynamic materials destruction It should be noted essential distinction of dynamic and static strength characteristics. Comparison of structural changes at static and dynamic loading shows that at short-term influence there is a dynamic recrystallization – formation of new fine grains. Extent of dynamic recrystallization the greatest in samples with the bigger duration of loading and the maximum cross section (a large-scale factor). Aluminum samples after loading show big tendency to cavitation at increase in the period of loading in comparison with the initial. Besides, at increase in duration of influence in samples there is an origin of a multiple splitting off. 5. Conclusion 1. Techniques of experimental studying of quasistatic and dynamic properties metal foils are developed and applied. 2. Deformation and strength characteristics aluminum and copper foils are defined. 3. Analytical expressions for mechanical characteristics of materials are received. 4. The microstructural analysis of destruction zones is made at quasistatic and dynamic loading. 5. Comparison of properties of materials in the conditions of the static and dynamic loading, shown their essential distinction is carried out. References [1] Physical quantities: The directory / Under the editorship of I.S.Grigoriev, E.Z.Meylikhova. – M: Energoatom, 1991. – 1332 pages. [2] Foil aluminum for condensers. Specifications. GOST 25905-82. – 27 pages. [3] V.A Morozov, Yu. V. Petrov, A. A. Lukin, V. M. Kats, S. A. Atroshenko, G. D. Fedorovskii, Fracture of Metallic Ring Samples under Magnetic Pulse Shock Action (2013) in ICF 13.
RkJQdWJsaXNoZXIy MjM0NDE=