A STUDY ON SAFETY ASSESSMENT OF STRUCTURAL MEMBERS SUBJECTED TO COMBINED TENSILE AND BENDING STRESS FATIGUE

Fatigue crack growth characteristics were investigated using center notched plate specimens. The results showed that the mean stress has an effect on the growth rate and the growth rate can be expressed using following formula which takes the mean stress effect into account, C(Kmax/delta K) (delta K) to the m. Experimental work was also done to investigate fatigue crack propagation behavior of semielliptical surface cracks subjected to combined tensile and bending stresses. Off-centered plate specimens with mechanically introduced surface cracks were used for this test. Estimation on fatigue crack growth was then made on such cracks applying the results of theoretical analysis done by Shah and Kobayashi on stress intensity factor for semi-elliptical surface cracks. From the analysis, it was found that the larger the amount of bending the longer the extension is along the surface. Experimental results showed similar trend to analytical results with respect to fatigue crack front configurations.

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  • Corporate Authors:

    Society of Naval Architects of Japan

    23 Shiba-kotohiracho, Minato-ku
    Tokyo 135,   Japan 

    Society of Naval Architects of Japan

    15-16, Toranomon, 1-chome, Minato-ku
    Tokyo,   Japan 
  • Authors:
    • Yada, T
    • SAKAI, K
    • UEMURA, T
    • Iino, N
  • Publication Date: 1974-6

Language

  • Japanese

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Filing Info

  • Accession Number: 00071562
  • Record Type: Publication
  • Source Agency: Society of Naval Architects of Japan
  • Files: TRIS
  • Created Date: Nov 12 1974 12:00AM