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INDONESIA
Jurnal Energi Dan Manufaktur
Published by Universitas Udayana
ISSN : 23025255     EISSN : 25415328     DOI : -
Core Subject : Science, Engineering,
Energy Industrial & Manufacturing Engineering
"Jurnal Energi dan Manufaktur" is a journal published by Department of Mechanical Engineering, University of Udayana, Bali since 2006. During 2006-2011 the journal's name was "Jurnal Ilmiah Teknik Mesin CAKRAM" (Scientific journal in mechanical engineering, CAKRAM). "Jurnal Energi dan Manufaktur" is released biannually on April and October, respectively. We invite authors to submit papers from experimental research, review work, analytical-theoretical study, applied study, and simulation, in related to mechanical engineering (energy, material, manufacturing, design) to be published through "Jurnal Energi dan Manufaktur".
Arjuna Subject : -
Articles 22 Documents
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Search results for , issue "Vol 9 No 1 (2016): April 2016" : 22 Documents clear
Perancangan Rasio Sistem Transmisi Kendaraan Penggerak Roda Belakang Untuk Meningkatkan Kinerja Traksi IGAK Suriadi; I Ketut Adi Atmika
Jurnal Energi Dan Manufaktur Vol 9 No 1 (2016): April 2016
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (222.193 KB)

Abstract

Abstrak:Gaya traksi yang terjadi pada bidang kontak roda penggerak dan jalan dipengaruhi oleh banyak faktor diantaranyaadalah: karakteristik torsi mesin, karakteristik kopling, rasio dan tingkat transmisi, rasio gardan, karakteristik propellershaft, diameter efektif roda, karakteristik kontak roda dan jalan. Dari sekian banyak parameter yang mempengaruhisalah satu yang sangat besar pengaruhnya adalah rasio dan tingkat transmisi atau disebut rasio sistem transmisi.Besarkecilnya traksi untuk setiap tingkat gigi serta kecepatan kendaraan yang mampu dicapai dapat dikendalikan denganmengatur atau merancang rasio dan jumlah tingkat kecepatan gigi transmisi, sehingga didapatkan kinerja traksi yangoptimum.Penelitian ini bertujuan untuk menguji dan mengkaji kinerja traksi sistem transmisi kendaraan roda empatkondisi standar dengan penggerak roda belakang, memodifikasi/merancang sistem tersebut. Kemudian melakukananalisa kebutuhan gaya traksi yang diperlukan serta kemampuan traksi yang mampu dihasilkan sistem transmisistandar dan sistem transmisi hasil perancangan ketika melewati berbagai kondisi jalan.Metode penelitian yangdilakukan dimulai dengan pengujian/eksperimen, dimana pengujian dilakukan untuk menguji mesin kendaraanpenggerak roda belakang pada chassis dinamometer untuk mendapatkan data besarnya daya di poros penggerak, torsidan kecepatan yang mampu dihasilkan oleh kendaraan pada setiap interval kenaikan mesin pada tiap rasio gigitransmisi. Selanjutnya dari data-data yang terkumpul dilakukan modeling, simulasi, dan analisa dengan menggunakansistem transmisi standar, sistem transmisi hasil perancangan dengan progresi geometri bebas terhadap kebutuhantraksi pada kendaraan ketika melintasi kondisi jalan tertentu. Sistem tranmsisi hasil rancangan menghasilkan traksimaksimum sebesar 12000 N sedangkan sistem transmisi standar sebesar 10500 N, denganjarak antara kurva gigi yangberdekatan semakin dekat. Perancangan atau modifikasi ratio dengan 6 tingkat kecepatan menghasilkan kinerja traksiyang paling baik.Kata kunci: Gaya traksi, rasio gigi, jumlah tingkat kecepatan, progresi geometri bebasAbstract:Traction force that occurs in the contact area and the drive wheel is influenced by many factors such as: thecharacteristics of the engine torque, clutch characteristics, ratio and rate of transmission, axle ratio, and characteristicsof the propeller shaft, the effective diameter of the wheels, the wheels and the road contact characteristics. Of the manyparameters which affect one of the very big influence is the ratio and the level of transmission or the ratio transmissionsystem. The traction for any level of gear and vehicle speed that can be achieved can be controlled by designing ratiosand the number of levels of the transmission gear speed, so we get optimum traction performance. This study aims toexamine and assess the performance of traction transmission system of vehicles with the standard conditions ofrearwheel drive, modify/designing the system. Then do a needs analysis and the traction force necessary tractioncapabilities are able to produce a standard transmission systems and transmission system design results when passingthrough various road conditions. Research methodology begins with experimentation, where testing is done to test theengine rearwheel drive vehicle on the chassis dynamometer to obtain the magnitude of the driving shaft power, torqueand speed that can be produced by the vehicle at each interval increment on each engine transmission gearratios.Furthermore, from the data collected do modeling, simulation, and analysis using a standard transmissionsystem, transmission system design results in geometric progression independent of the need for traction on a vehiclewhen passing certain road conditions. Tranmsisi system design results generate maximum traction at 12000 N while thestandard transmission system amounted to 10500 N, with the distance between adjacent tooth curves getting closer.The design or modification ratio with 6 levels of speed to produce the most good traction performance.Keywords: Traction, gear ratio, amount level stage, rolling resistance
Prediksi Kurva P-h dan Nilai Kekerasan pada Indentasi Bulat Berbasis Pendekatan Tegangan Representatif (?r) I Nyoman Budiarsa
Jurnal Energi Dan Manufaktur Vol 9 No 1 (2016): April 2016
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (754.052 KB)

Abstract

Abstrak:Dalam penelitian ini model elemen hingga untuk indentasi bulat (Spherical) telah dikembangkan dan divalidasi. Sebuahpendekatan untuk memprediksi kurva P-h dari sifat material konstitutif telah dikembangkan dan diuji berdasarkanhubungan antara kelengkungan dan sifat-sifat material dan stres representatif (?r) Hubungan antara parameterkonstitutif material (di tetapkan sebagai yield stress (?y) dan koefisien pengerasan regang (n)) bahan elastis-plastik,kurva P-h (kurva tegangan-kedalaman indentasi) dan kekerasan (hardness) pada indentasi bulat telah diselidiki secarasistematis dengan menggabungkan analisis tegangan representatif dan pemodelan elemen hingga (Finite Elemen)menggunakan baja. Parametrik Finite elemen model indentasi bulat (Spherical) telah dikembangkan sebagai rangesimulasi. Dua pendekatan baru untuk mengkarakterisasi kurva P-h untuk indentasi bulat (Spherical) telahdikembangkan dan dievaluasi. Melalui pendekatan fitting kurva penuh dan pendekatan kedalaman indentasi(indentation depth). Kedua pendekatan tersebut terbukti memadai/efektif dalam memprediksi kurva P-h indentasibahan. Konsep dan metodologi yang dikembangkan kemudian digunakan untuk memprediksi nilai kekerasan (HRB)Rockwell B hardness melalui analisis langsung dan divalidasi dengan data eksperimen pada sampel yang dipilih daribajaKata kunci: Indentasi Bulat, stres representatif, koefisien pengerasan regang, Kurva P-h, HRBAbstract:In this work, the finite element model of spherical indentation has been developed and validated. An approach to predictthe P-h curve of the material constitutive properties have been developed and evaluated based on the relationshipsbetween curvature and material properties and representative stress (?r). The relationships between constitutiveparameters of the material (in the set as the yield stress (?y) and strain hardening coefficient (n) ) of elastic-plasticmaterial, P-h curve (Force-indentation depth curve) and hardness in the spherical indentation has been investigatedsystematically by combining the representative stress analysis and finite element modeling using steel. ParametricFinite element model of spherical indentation has developed a range of simulation. Two new approaches to characterizethe P-h curve for spherical indentation has been developed and evaluated. One is the full curve fitting approach whilethe other is depth indentation base approach. Both approaches proved to be adequate / effective in predicting theindentation P-h curve material. The Concepts and methodology developed is to be used to predict the value of hardness(HRB) Rockwell B hardness through direct analysis and validated with experimental data on selected samples of steel.Keywords: Spherical Indentation, representative stress, strain hardening coeff., P-h curve, HRB

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