On the Issue of Determining Parameters in Models and Criteria of Dynamic Spallation Fracture. (2017)

• Record Type: Journal Article
• Authors: Volkov, I.A.; Igumnov, L.A.; Ipatov, A.A.; Vorobtsov, I.V.
• Is Part Of: Procedia engineering. Volume 197(2017)
• Page Start: 244
• Page End: 251
• Publication Date: 2017
• Subjects: dynamic deformation -- spallation -- stress waves -- models and criteria of dynamic failure -- modeling -- material parameters -- methodology of determining -- mathematical nonlinear programming -- minimization of quadratic deviation; Engineering -- Congresses; Engineering -- Periodicals; Engineering; Conference proceedings; Periodicals; 620.005
• DOI: 10.1016/j.proeng.2017.08.101
• Languages: English
• ISSNs: 1877-7058

Abstract

Abstract: The issue of determining material parameters and scalar functions in models and criteria of dynamic spallation fracture is discussed. An experimental-theoretical methodology to obtain them for the dynamics of failing elastoplastic media is presented, which consists in analyzing inverse problems. The methodology involves testing specimens of the studied material, using special regimes of dynamic loading, followed by analyzing a number of numerical modeling problems. For models and criteria of dynamic spallation fracture, the methodology is based on minimizing the quadratic deviation between experimental and analytical data containing information on the kinetics of the spallation fracture process. The reliability and unambiguity of the determined material parameters is demonstrated by comparing the experimental and analytical data.