The required characteristics of motion were determined by analysis of the autodyne signal. The experimental results to determine the motion characteristics of oscillations of elastic spherical shell filled under the pneumopulse action have been presented. (orig.)ĭetermining characteristics of oscillations of elastic spherical shell filled using semiconductor laser autodyneĭobdin, S. Material models are included for solids, liquids and gases (including HE detonation products). At present, all four processors use explicit time integration but implicit options will be added to the Lagrange and ALE processors in the near future. AUTODYN currently includes a Lagrange processor for modeling solid continua and structures, an Euler processor for modeling fluids and the large distortion of solids, an ALE (Arbitrary Lagrange Euler) processor for specialized flow models and a shell processor for modeling thin structures.
Finite difference grids operated on by these processors can be coupled together in space and time to efficiently compute structural (or fluid-structure) interactions. The scheme allows alternative numerical processors to be selectively used to model different components/regions of a problem. Both translational and axial symmetry are treated. Obata, H.ĪUTODYN uses a two dimensional coupled finite difference approach similar to the one described by Cowler and Hancock (1979). (paper)ĪUTODYN - an interactive non-linear dynamic analysis program for microcomputers through supercomputersīirnbaum, N.K. Increasing depth of cut leads to higher ROP at the cost of higher cutting force. The simulation result shows that the +10° back rake angle results in higher rate of penetration (ROP). In the simulation, the cutting tool was dragged against stationary rock at predetermined linear velocity and the depth of cut (1,2, and 3 mm) and the back rake angles(-10°, 0°, and +10°) were varied. A two-dimensional single PDC cutter and rock model were used to simulate the orthogonal cutting process and to investigate the effect of different parameters such as depth of cut, and back rake angle on two types of rocks (sandstone and limestone). In this study the finite element method in ANSYS AUTODYN-2D is used to simulate the dynamics of cutter rock interaction, rock failure, and fragmentation. In a drilling process for oil and gas exploration, understanding of the interaction between the cutting tool and the rock is important for optimization of the drilling process using polycrystalline diamond compact (PDC) cutters. Woldemichael, D E Rani, A M Abdul Lemma, T A Altaf, K
International Nuclear Information System (INIS) A new chapter on nuclear thermal propulsion has been added to reflect this revival of interest.Numerical simulation of rock cutting using 2D AUTODYN Nuclear propulsion has emerged from the doldrums and is now seen as a definite possibility for outer solar system robotic exploration and as enabling technology for a human mars expedition. This is now seen as the key to planetary exploration by robotic probes and should therefore be reflected. The main revisions will be to the chapter on electric propulsion where there have been significant new developments both in engine types and in practical applications. Most chapters will remain substantially the same as the first edition they will be updated where necessary and errata corrected. The revised edition will stick to the same principle of providing a serious exposition of the principles and practice of rocket propulsion, but from the point of view of the user and enquirer who is not an engineering specialist. The author covers the fundamentals of the subject, from the basic principles of rocket propulsion and vehicle dynamics through the theory and practice of liquid and solid propellant motors, to new and future developments. The revised edition of this practical, hands-on book discusses the range of launch vehicles in use today throughout the world, and includes the very latest details of some of the advanced propulsion systems currently being developed.
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