Determination of stress intensity factors for cracks in complex stress fields.

• Autorzy: Wu Z. , Jakubczak H. , Glinka G. , Molski K. , Nilsson L.

Warianty tytułu

PL

Wyznaczanie współczynnika intensywności naprężeń dla szczelin w złożonych polach naprężeń.

• Języki publikacji: EN

Abstrakty

EN

Fatigue cracks in machine components are subjected to stress fields introduced by the external load and residual stresses resulting from the surface tratement. Stress fields in such cases are characterized by non-uniform distributions and handbook stress intensity factor solutions for such configurations are not available. The method presented below is based on the generalized weight function technique enabling the stress intensity factors to be calculated for any Mode 1 loading applied to arbitrary planar convex crack. The method is particularly suitable for modelling fatigue crack growth in presence of complex stress fields.

PL

Pęknięcia w elementach maszyn podlegają naprężęniom wywołanym obciążeniami zewnętrznymi oraz naprężeniom własnym wywołanym procesem technologicznym wytwarzania tych elementów. Pola naprężeń obciągających szczelinę charakteryzują się w takich przypadkach nierównomiernymi rozkładami, dla których nie istnieją wzory na współczynniki intensywności naprężeń. Przedstawiona metoda opiera się na ogólnej metodzie funkcji wagowych i umożliwia obliczanie współczynnika intesywności naprężeń dla dowolnych wypukłych szczelin płaskich przy 1 sposobie pękania. Metoda nadaje się w szczególności do modelowania wzrostu pęknięć zmęczeniowych przy dowolnym rozkładzie naprężeń obciążających szczelinę.

Słowa kluczowe

EN

stress intensity; weight function; fatigue crack growth

PL

intensywność naprężeń; funkcja wagowa; pęknięcie zmęczeniowe

• Wydawca: Komitet Budowy Maszyn PAN
• Czasopismo: Archive of Mechanical Engineering
• Rocznik: 2003
• Tom: Vol. L, nr 1
• Strony: 41--67
• Opis fizyczny: Bibliogr. 21 poz., rys.

Twórcy

autor

Wu Z.

• Department of Mechanical Engineering, University of Waterloo, Ontario N2L 3GI, Canada

autor

Jakubczak H.

• Warsaw Univ. of Technology, Inst. of Constructtion Machinery Engineering, Narbutta 84, 02-524 Warsaw, Poland

autor

Glinka G.

• Department of Mechanical Engineering, University of Waterloo, Ontario N2L 3GI, Canada

autor

Molski K.

• Bialystok Technical University, Wiejska 45c, 15-351 Bialystok, Poland

autor

Nilsson L.

• SAQ KONTROLL AB, Box 49306, 100 29 Stockholm, Sweden

Bibliografia

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• [2] Rice J. R.: Some Remarks on Elastic Crack-Tip Stress Field, International Journal of Solids and Structures, Vol. 8, 1972, pp. 751-758.
• [3] Tada H., Paris P. and Irwin G.: The Stress Analysis of Cracks Handbook, 2nd ed., Paris Production Inc., 1985, St. Louis, Mo.
• [4] Wu X. R. and Carlsson A. J.: Weight Functions and Stress Intensity Factor Solutions, 1991, Pergamon Press, Oxford, UK.
• [5] Fett Т. and Munz D.: Stress Intensity Factors and Weight Functions for One-Dimensional Cracks, Report No. KfK 5290, Kernforschungszentrum Karlsruhe, Institut für Materialforschung, Dezember, 1994, Karlsruhe, Germany.
• [6] Molski K. L.: Method of Stress Intensity Calculation Based on the Unitary Weight Function. Journal of Theoretical and Applied Mechanics, Vol. 1, No. 32, 1994, pp. 153-161.
• [7] Glinka G. and Shen G.: Universal Features of Weight Functions for Cracks in Mode I, Engineering Fracture Mechanics, Vol. 40, No. 6, 1991, pp. 1135-1146.
• [8] Shen G. and Glinka G.: Determination of Weight Functions from Reference Stress Intensity Factors, Theoretical and Applied Fracture Mechanics, Vol. 15, No. 2, 1991, pp. 237-245.
• [9] Shen G. and Glinka G.: Weight Functions for a Surface Semi-Elliptical Crack in a Finite Thickness Plate, Theoretical and Applied Fracture Mechanics, Vol. 15, No. 2, 1991, pp. 247-255.
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• [14] Murakami Y.: Stress Intensity Factors Handbook, Vol. 2, Pergamon Press.
• [15] Nilssen L.: SAQ/FoU-Report 98/10, Stress Intensity Factors for Half-Elliptical Surface Cracks in Plates Subjected to a Complex Stress Field, ISSN 1401-5331.
• [16] Fett Т., Mattheck С. and Munz D.: On the Calculation of Crack Opening Displacement from the Stress Intensity Factor. Engineering Fracture Mechanics, Vol. 27, No. 6, 1987.
• [17] Broek D.: The Practical Use of Fracture Mechanics, Amsterdam, Kluwer, 1988.
• [18] Newman J. C. and Raju I.S.: Stress Intensity Factors Equations for Cracks in Three Dimensional Bodies Subjected to Tension and Bending, in: Computational Method in the Mechanics of Fracture. S.N. Alturi, Ed., (North-Holland: Amsterdam), 1986.
• [19] Shiratori M., Niyoshi T. and Tanikawa K.: Analysis of Stress Intensity Factors for Surface Cracks Subjected to Arbitrarily Distributed Surface Stress, in: Stress Intensity Factors Handbook, Y. Murakami et al., Eds., Vol. 2, (Pergamon: Oxford), 1987.
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