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All Journal MESIN Majalah Ilmiah Pengkajian Industri
H. Agus Suhartono
UPT LUK - BPPTeknologi Kawasan Puspiptek, Serpong 15314, Tangerang
Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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UJI STATISTIK PADA PENELITlAN PENGARUH PERLAKUAN PERMUKAAN TERHADAP UMUR FATIK DENGAN DATA TERBATAS Suhartono, H. Agus
MESIN Vol 8, No 1 (2006)
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

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Abstract

Justifications on the influences of two or more parameters on fatigue strength are some timesproblematic due to the nature scatter of the fatigue data. Statistic test canfacilitate the evaluation, wether thechanges in material characteristics as a result ofspecific parameters of interest is significant. Thestatistictests were applied tofatigue data ofAISI 1045 steel specimens. Thespecimens are consisted ofas receivedspecimen, shotpeenedspecimen with 0,0147 and0,0161 Almen intensity as well as carburizedspecimen. Thefatigue tests of the specimens are conducted in three horizonts of loading. The fatigue datas are thendescribed by S-N diagrams (Stress - Cycles to Failure diagrams). A transformation to one stress horizon iscarriedout dueto limitedamount ofthefatigue data. Statistic tests, which are appliedto the datasshow, thattheshotpeeningandcarburization processprovide a significant effect to thefatigue strength ofthespecimen.However additional timein shotpeeningprocess with thepurposeofincreasing theshotpeening intensity hasnosignificant effectto the increasingoffatigue strength ofthesteel specimens.
APLIKASI TEGANGAN-REGANGAN EKIVALEN PADA PERHITUNGAN UMUR FATIK PADUAN AL 6063 UNTUK BEBAN AKSIAL DAN TORSI Suhartono, H. Agus
MESIN Vol 9, No 1 (2007): Bahan Bakar Alternatif
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

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Abstract

Tension-compression and torsion low cycle fatigue testing were conducted by straincontrol on Aluminum alloy 6063 thin wall tube specimens. The relation between type of loading anddeformation characteristics were recordedand analyzedfor calculating equivalent stress and strain.The Von Misses and Henckys equation can transform the shear stress-strain into equivalent stressstrainvery good which is proved by experimental result. The life prediction based on the calculatedequivalent straingive a satisfactory resultfor both type of loading.
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