Stress Intensity Factor Analysis and Fatigue Behavior of A Crack in The Residual Stress Field of Welding

• Autorzy: Terada H.

Identyfikatory

DOI

10.2478/v10164-010-0032-8

• Języki publikacji: EN

Abstrakty

EN

This paper deals with the behavior of a crack in the residual stress field induced by the butt weld in a wide plate. It is known that the distribution form of residual stress has similarities regardless of the welding process, although the size and the magnitude of the residual stress depend largely on the welding process. Stress intensity factor and stress redistribution induced by the crack extension were calculated for a crack with arbitrary length and location. The stress redistributions caused by crack extension obtained by the present analysis showed good agreement with the experimental data. Fatigue crack propagation behavior in the residual stress field reported by Glinka was also examined from ΔK point of view. The effect of residual stress on the fatigue crack propagation rate is considered to be the effect of varying mean stress. It was shown that fatigue crack propagation rate is estimated by the following equation with reasonable accuracy.
da/dn=CΔF^α(1+ σ₀/Δσ F_res)
In the above equation, material constants C and α of Paris’s law are experimentally obtained by using specimens without the weld joint.

Słowa kluczowe

EN

stress intensity factor analysis; crack; residual stress field; butt weld; stress redistribution; fatigue crack; crack propagation

• Wydawca: Wydawnictwa Naukowe Sieci Badawczej Łukasiewicz - Instytutu Lotnictwa
• Czasopismo: Fatigue of Aircraft Structures
• Rocznik: 2011
• Tom: Iss. 3
• Strony: 5--15
• Opis fizyczny: Bibliogr. 12 poz., rys., wykr., wzory

Twórcy

autor

Terada H.

• Japan Aerospace Technology Foundation, Tokyo, Japan

Bibliografia

• [1] Hoeppner, D.W. (1978). Fatigue Testing of Weldments. American Society for Testing and Materials STP 648.
• [2] Throop, J.F. & Reemsnyder, H.S. (1982). Residual Stress Effects in Fatigue. American Society for Testing and Materials STP 776.
• [3] Nelson, D.V. (1982). Effects of Residual Stress on Fatigue Crack Propagation. American Society for Testing and Materials STP 776, (pp. 172 - 188).
• [4] Parker, A.P. (1982). Discussion to ref (3). American Society for Testing and Materials STP 776, (pp. 188 - 194).
• [5] Terada, H. (1976). An Analysis of the Stress Intensity Factor of a Crack Perpendicular to the Welding Bead. Engineering Fracture Mechanics. 8(3), 441 - 444.
• [6] Tada, H. & Paris, P.C. (1983). The Stress Intensity Factor for a Crack Perpendicular to the Welding Bead. International Journal of Fracture. 21(2), 279 - 284.
• [7] Kanazawa, T., Oba, H. & Susei, S. (1962). The Effect of Welding Residual Stress Upon Brittle Fracture Propagation (Rept. 2). Transactions of Japan Society of Naval Architects. No. 110, 359 - 368.
• [8] Terada, H. & Nakajima, T. (1985). Analysis of Stress Intensity Factor of a Crack Approaching Welding Bead. International Journal of Fracture. Vol. 27, 83 - 90.
• [9] Abramowitz, M. & Stegun, A. (1954). Handbook of Mathematical Function. Dover ed. p. 890.
• [10] ibid., p. 889.
• [11] Glinka, G. i inni. (1979). Fracture Mechanics. American Society for Testing and Materials STP 677. (pp. 198 - 212).
• [12] Newman, J.C., Jr. (1981). A Crack Closure Model for Predicting Fatigue Crack Growth Under Aircraft Spectrum Loading. NASA. (TM 81941)