Simplified and advanced models of a valve system used in shock absorbers

• Autorzy: Czop P. , Sławik D. , Śliwa P. , Wszołek G.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of this paper is to develop a model of a valve system applicable for strain and stress prediction. Design/methodology/approach: The analytical and numerical approaches are presented to provide an overview for available methods and prediction accuracy. Findings: An equivalent numerical model of a disc valve system of different complexity was developed and discussed. Research limitations/implications: It is important to provide a model functionality allowing for calculation of disc stacks supported by a coil spring and stack settings having the opening limiter. Disc stack stress and opening characteristics vs. applied pressure may be determined with simplified analytically derived model and full 2D model including almost all significant forces and moments in a stack of circular plates. An advantage of a simplified disc stack model is possibility of its implementation in an environment supporting matrix operations, e.g. Matlab. Practical implications: A valve system has to withstand the cyclic pressure load across the piston. The number of discs, their diameters and thicknesses directly affect durability of a valve system. Damper force and valve durability expressed in life-cycles are the optimization criteria considering during selection and tuning of a valve system. Originality/value: A new valve system was developed in two versions, i.e. simplified and advanced. The model allows durability prediction at the design stage reducing the testing costs of low-performance valve systems.

Słowa kluczowe

EN

computational mechanics; Finite Elements Model; valve system; shock absorber

PL

mechanika numeryczna; model elementów skończonych; system spustowy; amortyzator

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2009
• Tom: Vol. 33, nr 2
• Strony: 173--180
• Opis fizyczny: Bibliogr. 18 poz., rys., tabl.

Twórcy

autor

Czop P.

autor

Sławik D.

autor

Śliwa P.

autor

Wszołek G.

• Tenneco Automotive Eastern Europe, Eastern European Engineering Center (EEEC), Control and Measuring Systems Department, ul. Bojkowska 59b, 44-100 Gliwice, Poland,

Bibliografia

• [1] W. C. Young, Roark’s Formulas for Stress and Strain, McGraw-Hill, 2003.
• [2] Y. Lee, J. Pan, R. Hathaway, M. Barkey, Fatigue testing and analysis, Elsevier Inc., Oxford, 2005.
• [3] J. N. Reddy, Theory and Analysis of Elastic Plates, Taylor & Francis, 1999.
• [4] L. M. Kachanov, Fundamentals of the Theory of Plasticity, Courier Dover Publications, 2004.
• [5] J. P. Den Hartog, Advanced Strength of Materials, Courier Dover Publications, 1987.
• [6] J. Chakrabarty, Applied Plasticity, Springer, 2000.
• [7] K. Chandrashekhara, Theory of Plates, Orient Longman, 2001.
• [8] E. Ventsel, T. Krauthammer, Thin Plates and Shells: Theory, Analysis, and Applications, CRC Press, 2001.
• [9] E. Bayraktar, J. Masounave, R. Caplain, C. Bathias, Manufacturing and damage mechanisms in metal matrix composites, Journal of Achievements in Materials and Manufacturing Engineering 31/1 (2008) 294-300.
• [10] H. Imrek, M. Bagci, O. M. Khalfan, Experimental investigation of effects of external loads on erosive wear, Journal of Achievements in Materials and Manufacturing Engineering 32/1 (2009) 18-22.
• [11] S. Duym, S. Dupont, D. Coppens, Data Reduction of Durability Tests for Shock Absorbers, 23rd International Seminar on Modal Analysis, Leuven, Belgium (1998) 217-225.
• [12] A. W. Leissa, Vibration of Plates, Ohio State University, Scientific and Technical Information Division, Washington, D.C., 1969.
• [13] U. Suripa, A. Chaikittiratana, Finite element stress and strain analysis of a solid tyre, Journal of Achievements in Materials and Manufacturing Engineering 31/1 (2008) 576-579.
• [14] C. L. Chang, S. H. Yang, Finite element simulation of wheel impact test, Journal of Achievements in Materials and Manufacturing Engineering 28/1 (2008) 167-170.
• [15] P. Czop, D. Sławik, P. Śliwa, G. Wszołek, Circular plates theory applied to modeling of intake valves used in shock absorbers, Journal of Achievements in Materials and Manufacturing Engineering (2009) (in print).
• [16] X. Lauwerys, Nonlinear disc stack model for valve design, Intercompany test and analysis report, Tenneco Automotive, 1998.
• [17] S. P. Timoshenko, S. Woinowsky-Krieger, Theory of Plates and Shells, McGraw-Hill Kogakusha Ltd., 2nd edition, 1959.
• [18] Abaqus PDF Documentation v6.7, Dassault Systèmes, 2007.