PENGARUH PELEPASAN TEGANGAN SISA DENGAN METODE GETARAN TERHADAP FREKUENSI NADA DASAR BILAH PERUNGGU GAMELAN

Ari Wibowo, Sukoco Sukoco

Sari


ABSTRACT

Bronze is the material that is usually used to make musical instruments. Unfortunately, it’s known that the tone of some instruments will change after several times of usage, like in gamelan. The theory that underlies the change of the tone is residual stress. Residual stress is resulted from some forging activities during the production of gamelan. The objective of this research is to prove that the residual stress release will affect the change of the tone frequency of bronze; therefore, the change of the tone frequency of gamelan could be known. Experimental analysis was employed to prove the hypothesis. The specimens consisted of three beams of forged bronze. The residual stress was released from the beams by vibratory stress release method and the change of the tone frequency was measured. The amount of residual stress was measured at the beginning and at the end of the vibratory treatment with neutron diffraction method. The result showed that the tone frequency increased after the residual stress was released. The tone frequency changed 1 Hz for non-reduction specimen. While the 30% thickness reduction and 50% reduction changed 1 Hz and 3.5 Hz in frequency. Residual stress measurement showed that the residual stress decreased after vibratory stress release. The average reduction of residual stress could attain 39,6% for non-reduction specimen, 69,9% for 30% thickness reduction specimen and 81% for 50% thickness reduction specimen. It could be concluded that the change in gamelan tone caused by residual stress.

Keywords: residual stress, tone frequency, bronze, gamelan


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DAFTAR PUSTAKA

Anderoglu, Osman, 2004, Residual Stress Measurement Using X-Ray Diffraction, Thesis, Texas A&M University.

Aoki, S., Nishimura, T., Hiroi, T., 2005, Reduction method for residual stressof welded jointusing random vibration, Nuclear Engineering and Design 235(2005) 1441–1445

Alves, Bill, 1997, Pleng: Composing for a Justly Tuned Gender Barung, Journal of the Just Intonation Network 1, pp. 4-11

Beards, C.F., 1996, “Structural Vibration: Analysis and Damping”, John Willey & Sons, New York.

Burzic, Meri, dkk, 2012, Effect of Vibration on the Variation of Residual Stresses and Impact Energy in Butt-Welded Joints, Structural Integrity and Life, Vol 12, No 3 (2012), pp. 215-220

Callister, W.D., Jr., 2007, Material Science and Engineering, An Introduction, 7th ed, John Willey & Sons, inc. pp 36-206

Fitzpatrick, M.E., dkk, 2005, Determination of Residual Stresses by X-ray Diffraction – Issue 2, National Physical Laboratory Teddington, Middlesex, United Kingdom

Gibmeier, J., Hartmann, S., dan Scholtes, B., 2005, Effect of applied and residual stresses on the analysis of mechanical properties by means of instrumented indentation techniques, Materials Science Forum Vols. 490-491 (2005) pp. 454-460

Hahn, W.F. 2002, Vibratory Residual Stress Relief and Modifications in Metals to Conserve Resources and Prevent Pollution, Final Report, Center of Environmental and Energy Research (CEER), Alfred University, New York

He, B.B., Preckwinkel, Uwe, Smith, K.L., 2000, Fundamentals of Two-Dimensional X-Ray Diffraction (XRD2), JCPDS-International Centre for Diffraction Data,Advances in X-ray Analysis,Vol.43 p. 237-280

Malau, Daniel P., , 2004, Kaji Numerik dan Eksperimental Parameter Dinamik Gong Sunda dan Gong Jawa, Tugas Sarjana, Dept Teknik Mesin, ITB

Perrin, R., Swallowe, G.M., Charnley, T., dan Marshall, C., 1999, “On The Debossing, Annealing and Mounting of Bells”, Journal of Sound and Vibration 227(2), pp. 409-425

Prevéy, Paul S., 1986, “X-ray Diffraction Residual Stress Techniques”, Metals Handbook 10, Metals Park: American Society for Metals, , 380-392.

Qiu, A.P., Su, Y., Wang, S.R., dan Zhou, B.L., 2005. “Effect of Residual Stresses on a Micromachined Z-Axis Vibrating Rate Gyroscope”, Key Engineering Materials Vols. 295-296 pp. 101-106

Roy, A.K., Venkatesh, A., Marthandam, V., Dronavalli, S.B., Wells, D., Rogge, R., 2005, Residual Stress Characterization in Structural Materials by Destructive and Nondestructive Techniques, Journal of Materials Engineering and Performance, Volume 14(2) April 2005 p.203-211

Shackelford, James F., 2009, Introduction to Material Science for Engineers, Seventh Edition, Pearson Education Inc., New Jersey

Surjodiningrat, W. Sudarjana, P.J., dan Susanto, A., 1993, Tone Measurements of Oustanding Javanese Gamelan in Yogyakarta and Surakarta, Gadjah Mada University Press, 2nd. Revd Edition

Syahroni, Ahmad, 2007, Karakteristik Getaran pada Baja yang Mendapatkan Proses Penepaan, Skripsi, Jur Teknik Mesin dan Industri, UGM, Yogyakarta

Thomson, William T., 1993, “Theory of Vibration with Applications”, Fourth Edition, Prentice Hall, New Jersey.

Withers, P.J., dan Badheshia, H.K.D.H., 2001, “Overview Residual Stres : Part 1 – Measurement Technique”, Material Science and Technology, Vol 17 April, 2001 pp. 355-365

Zhang, Y.B., Chen, S.W., Liu, C.J., Sun, Y.H., Sun, M.C., dan Wang, R.K., 2005, “The Vibratory Stress Relief of Drill Pipe”, Materials Science Forum Vols. 490-491 pp. 300-304


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