Analisa Umur Kelelahan Tubular Joint Tipe T yang Memiliki Retak Through-Thickness pada Chord dengan Metode Elastic Plastic Fracture Mechanics (EPFM)

Widyaningtyas, Indahyu (2005) Analisa Umur Kelelahan Tubular Joint Tipe T yang Memiliki Retak Through-Thickness pada Chord dengan Metode Elastic Plastic Fracture Mechanics (EPFM). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Tugas Akhir ini menyajikan analisa umur kelelahan {fatigue life) tubular Joint Tipe T yang memiliki retak through-thickness pada chord. Metode yang digunakan adalah Elastic Plastic Fracture Mechanic berdasarkan R-curve analysis. Metode Fracture Mechanics merupakan metode yang paling tepat untuk perhitungan umur kelelahan . Masalah yang dirumuskan dalam tugas akhir ini adalah berapa besar Stress Intensity Factor (S1F), perambatan retak {crack propagation) dan umur kelelahan tubular joint. Besarnya Stress Intensity Factor didapatkan dari persamaan Irwin untuk Mode I. Hasil Ki kemudian divalidasikan dengan hasil K| perhitungan manual. K| digunakan untuk mengetahui a«, kemudian Ki digunakan untuk menghitung nilai R. Dari hasil perhitungan R tersebut maka dapat dilakukan perhitungan crack propagation dengan menggunakan persamaan Paris-Erdogan, yang nantinya akan digunakan untuk perhitungan umur kelelahan tubular joint. Dari hasil analisa diperoleh bahwa Stress Intensity Factor maksimum (SIF untuk tubular joint sebesar 4.148 ksiVin, SIF„un = 2.4326 ksiVin. Besarnya perambatan retak adalah 3.97907 x 1C* cycles, sedangkan umur kelelahan tubular joint = 109.05 tahun. ============================================================================================= This final project present fatigue life analysis tubular Joint Type T with through-thickness crack at chord. Method used is Elastic Plastic Fracture Mechanic pursuant to R-Curve analysis. Fracture Mechanics Method represent most precise method for the fatigue life calculation. Problem solution in final duty is how much Stress Intensity Factor ( SIF), crack propagation and fatigue life. Level Of Stress Intensity Factor got from equation Irwin for the Mode I. Result of K| later;then verification with result K, manual calculation. Kj used to know a^, then Ki used to calculate R. From the calculation R result hence can be calculation crack propagation by using equation Paris-Erdogan for the Ferrite Pearlite material, what later will be used for the fatigue life calculation. From result analysis obtained that maximum Stress Intensity Factor ( SIF^) for tubular joint equal to 4.148ksiVin, SIFmm = 2.4326 ksiVin. Level of crack propagation is 3.97907 x 10'8 cycles, while fatigue life = 109.05 year.

Item Type: Thesis (Undergraduate)
Additional Information: RSKe 620.112 6 Wid a
Uncontrolled Keywords: fatigue, fracture mechanics, crack, through-thickness crack, crack propagation, finite elemen method
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method
T Technology > TA Engineering (General). Civil engineering (General) > TA418.38 Materials--Fatigue.
T Technology > TC Hydraulic engineering. Ocean engineering
Divisions: Faculty of Marine Technology > Ocean Engineering > (S1) Undergraduate Theses
Depositing User: Eny Widiastuti -
Date Deposited: 09 Mar 2018 08:55
Last Modified: 09 Mar 2018 08:55
URI: http://repository.its.ac.id/id/eprint/51503

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