NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2012, 3 (5), P. 70–75
DESCRIPTION OF THE DEPENDENCE BETWEEN THE SPALL STRENGTH AND STRAIN RATE FOR METALS USING MORSE POTENTIAL
Pavel Tkachev – Saint Petersburg State Polytechnical University, Saint Petersburg, Russia, Postgraduate, pavel@paveltkachev.ru
Anton Krivtsov – Saint Petersburg State Polytechnical University, Saint Petersburg, Russia, Head of Department “Analytical mechanics”, Doctor of Science, Professor, akrivtsov@bk.ru
Comparison of the computer simulation of spall fracture and real experiments is presented. Simulation using particle dynamic method with Morse potential is carried out. The dependences of the spall fracture parameters on the dimensionless parameter k which characterize the width of the potential well is obtained. The values of the parameter k that allow one to describe the results of real experiments for some metals are presented.
Key words: particle dynamic method, spall fracture, Morse potential.
UDC 539.3539.4
PACS 62.20.D-, 81.40.Jj