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This paper is concerned with systems consisting of components colliding with each other. In particular, a high velocity adiabatic impact cutoff machinę is investigated. For generał understanding of the impact dynamics (affected by a large number of parameters), the mech-anisms are modelled in a simplified and accurate manner. Two simple models are developed: the energy-balance model and the spring-mass model. The energy-balance model is based on the principle of total energy conservation. It provides only the punch minimum kinetic energy reąuired for efEcient cutting. Concerning the spring-mass model, the different components are represented by rigid masses and their deformations are modelled by springs (linear or non-linear in the case of contact stiffness). The resulting non-linear eąuations are solved using the Newmark numerical teclmiąue. The impact force, velocity, displacement and acceleration histories are calculated what makes possible a fine description of the cutoff cycle steps. The two models are helpful for both the design and tuning of the mechanisms involving impacts between their components.
Słowa kluczowe
Czasopismo
Rocznik
Tom
Strony
101--116
Opis fizyczny
Bibliogr. 15 poz., rys., tab., wykr.
Twórcy
autor
autor
autor
autor
- Universite de Lyon, Lyon, F-69003, France
Bibliografia
- 1. S. ABRATE, Modeling of impacts on composite structures, Composite structures, 51, 2, 129-138, 2001.
- 2. A.-S. BONNET-LEBOUVIER, A. MOLINARI and P. LIPIŃSKI, Analysis of the dynamie propagation of adiabatic shear bands, International Journal of Solids and Structures, 39, 16, 4249-4269, 2002.
- 3. T. J. BURNS and M. A. DAVIES, On repeated adiabatic shear band formation during high-speed machining, International Journal of Plasticity, 18, 1, 487-506, 2002.
- 4. X. W. CHEN, Q. M. LI and S. C. FAN, Initiation of adiabatic shear failure in a clamped circular plate struck by a blunt projectile, International Journal of Impact Engineering, 31, 7, 877-893, 2005.
- 5. A. EBERLE, D. KLINGBEIL and J. SCHICKER, The calculation of dynamic JR-curves from the finite element analysis of a Charpy test using a rate-dependent damage model, Nuclear Engineering and Design, 198, 1-2, 75-87, 2000.
- 6. A. L. GURSON, Continuum theory of ductile rupture by void nucleation and growth: Part I, yield criteria and flow rules for porous media, Journal of Engineering Materials and Technology, 99, 2-15, 1977.
- 7. J. R. KLEPACZKO, Review on critical impact velocities in tension and shear, International Journal of Impact Engineering, 32, 1-4, 188-209, 2005.
- 8. G. W. Luo, Dynamics of an impact-forming machine, International Journal of Mechanical Sciences, 48, 11, 1295-1313, 2006.
- 9. S. S. Rao, Mechanical vibrations, Second edition, Addison-Wesley Publishing Company, 1990.
- 10. K. M. ROESSIG and J. J. MASON, Adiabatic shear localization in the dynamic punch test, part I: experimental investigation, International Journal of Plasticity, 15, 3, 241-262, 1999.
- 11. K. M. ROESSIG and J. J. MASON, Adiabatic shear localization in the dynamic punch test, part II: numerical simulations, International Journal of Plasticity, 15, 3, 263-283, 1999.
- 12. K. N. SHIVAKUMAR, W. ELBER and W. ILLG, Prediction of impact force and duration due to Iow velocity impact on circular composite laminates, ASME, 52, 674-680, 1985.
- 13. W. J. STRONGE, Impact Mechanics, Cambridge University Press, Cambridge 2000.
- 14. X. TENG, T. WIERZBICKI and H. COUQUE, On the transition from adiabatic shear bend-ing to fracture, Mechanics of Materials, 39, 2, 107-125, 2007.
- 15. S. TIMOSHENKO and N. GOODIER, Theory of elasticity, 3rd edition, McGraw-Hill, New-York 1970.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPB2-0032-0027