Publisher : The Korean Society of Mechanical Engineers
DOI : 10.3795/KSME-A.2015.39.12.1207
Title & Authors
Evaluation of Fatigue Life of Welded Joint of Gear Box-Shank in Vibro Ripper Using P-S-N Curve Oh, Kwang Keun; Kim, JaeHoon; Park, Jung Yeol; Yang, GyuSang; Park, JongWon; Kim, Sung Hyun;
A vibro ripper utilizes high-frequency vibration for rock fragmentation. This concept is different from those used by other existing breakers. The gearbox-shank welded joint of a vibro ripper is a very important part. Because it delivers the vibromotive force to the tooth, it is important to predict its soundness. This study was conducted to predict the fatigue life under welding conditions. The shank materials were Hardox-Hituf and AR400, and the filler metals were CSF-71T and CSF-81T. Fatigue tests were conducted under each set of conditions. P-S-N curves are presented based on the statistical testing method recommended by JSME-S002, and a comparison is made of the results under each set of conditions. The life was estimated using a P-S-N curve.
Lee, J.H., Ih, J.G., Park, S.H., Ha, T.G. and Lim, J.H., 2001, "Vibro-acoustic Design and Development of a Low-noise Hydraulic Breaker," Journal of the Korean Society for Noise and Vibration Engineering, Vol. 11, No. 5, pp. 148-155.
Park, G.B., Park, C.H., Park, Y.S. and Choi, D.H., 2011, "Optimal Design of Minimizing Weight of Housing of Hydraulic Breaker," Trans. Korean Soc. Mech. Eng. A, Vol.35, No.2, pp. 207-212.
Balasubramanian, V. and Guha, B., 1999, "Influence of Weld Size Fatigue Crack Growth Characteristics of Flux Cored are Welded Cruciform Joints," Materials Science and Engineering: A, Vol. 265, Issues 1-2, pp.7-17.
Lee, Y. B., 2012, "A Study on Characteristics of Fatigue Life in LOP Cruciform Fillet Welding Zone," Journal of the Korean Institute of Gas, Vol. 16, No. 3, pp.29-34.
Chang, K. H. and Lee, C. H., 2007, "Residual Stresses and Fracture Mechanics Analysis of a Crack in Welds of High Strength Steels," Engineering Fracture Mechanics, Vol. 74, Issue 6, pp. 980-994.
JSME S002, 1994, "Standard Method Statistical Ftigue Testing," Journal of the Japan Society of Mechanical Engineers, pp. 10-42.
Oh, K. K., Kim, J. H., Kim, Y. W., Park, J. Y., Yang, G. S., Park, J. W. and Kim, S. H., 2014, "Fatigue Characteristics on Welded Joint of Gear Box-Shank in Vibro Ripper for Rock Crash," Journal of the Korean Society of Safety, Vol. 29, No. 6, pp. 28-33.