THE EFFECT OF SELF-EQUILIBRATING STRESSES DUE TO MULTI-LINE SPOT WELDED STIFFENERS ON THE NATURAL FREQUENCIES OF PLATE
محتوى المقالة الرئيسي
الملخص
In this paper an investigation has been made into the effect of residual stresses on the vibration characteristics of a thin rectangular stainless steel plate with multi-line spot welded stiffeners. A new general frequency equation with and without the effect of residual stresses due to multi-line spot welding along the length and width of the plate for different boundary conditions were obtained. The results give that the free ends tries to increase the natural frequencies while the clamped edges try to decrease the natural frequencies; also the central position weld line has the great influence on the natural frequencies.
تفاصيل المقالة
كيفية الاقتباس
تواريخ المنشور
المراجع
Al-Ammri, "A Comparative Study between the (VSR) and Post-Weld Heat Treatment on the Fatigue Life Characteristic of Steel," Ph.D. Thesis, University of Baghdad, College of Engineering, Mechanical Department, 2004.
Bae D. H., Sohn I. S., and Hong J. K., “Assessing the Effects of Residual Stresses on the Fatigue Strength of Spot Welds”, Welding Journal, 18-23, (2003).
Berglund D., and Runnemalm H., “Comparison of Deformation Pattern and Residual Stresses in Finite Element Models of a TIG-Welded Stainless Steel Plate”, Volvo Aero Corporation, Manufacturing Process Development, Sweden, (2002).
Dickinson, S. M., "The Buckling and Frequency of Flexural Vibration of Rectangular, Isotropic and Orthotropic Plate Using Rayleigh's Method," Journal of Sound and Vibration, 61, pp. 1-8, 1978.
Faiz et al, “Static and Dynamic Analysis of Plates with Spot Welded Stiffeners” Ph.D. Thesis, Mechanical Engineering, Baghdad University, October 2006.
Golf, P., "The Effect of Self-Equilibrating Stresses on the Natural Frequencies of a Free-Free Rectangular Plate," Journal of Sound and Vibration, 47, pp. 85-94, 1976.
Guo M., Harik I. E., and Ren W. X., “Free Vibration Analysis of Stiffened Laminated Plates Using Layered Finite Element Method”, Structural Engineering and Mechanics, 14, 245-262, (2002).
Jung J. Y., and Kim J. H., “Vibration Control of Stiffened Plates With Integrated Piezoelectrics”, School of Mechanical and Aerospace Engineering. Coll. of Engineering, Seoul, Korea, (2002).
Kaldas M. M. and Dickinson S. M., "The Flexural Vibration of Welded Rectangular Plate", Journal of sound and vibration, 75(2), pp. 163-178, 1981.
Len Groud, "The Welding" , Hodder and Straughton, 1989.
Nacy S. M., Abdullah M. Q., and Ali M. M., “Free Vibration Analysis of Stiffened Conical Shell”, Journal of Engineering, Coll. of Engineering, Baghdad University, 8, 263-275, (2002).
Timoshenko S. P. and Gere J. M., "Theory of Elastic Stability of Plate", McGraw-Hill, New York, 1961.
Xin Long, “Finite Element Analysis of Residual Stress Generation During Spot Welding and its Affect on Fatigue Behavior of Welded Joint”, Ph.D. Thesis, University of Missouri-Columbia, December, (2005).