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Design and fatigue analysis of clucth system and fabrication of composite rotor blade mould of ultra-light helicopter

Design and fatigue analysis of clucth system and fabrication of composite rotor blade mould of ultra-light helicopter / Salma Said
Tujuan karya ini adalah untuk mereka bentuk dan menganalisa sistem klac Helikopter Ultra-ringan (HUR). Sistem klac dijangka dapat memindahkan 50 Nm daya kilasan dari kotak gear enjin ke kotak gear lawan putaran Helikopter Ultra-ringan (HUR). Selepas pembangunan sistem klac, analisis lesu pada aci input yang dilakukan. Analisis pada aci boleh laras juga dilakukan untuk mengkaji di mana kedudukan lengan gelongsor pada penyambung aci boleh laras yang menyumbang kepada daya tindak balas sampingan yang paling tinggi yang boleh membawa kepada kegagalan lesu. Secara umumnya analisis kegagalan lesu dilakukan dengan menggunakan pengiraan manual sahaja. Hasil pengiraan tekanan pengiraan manual dan dari perisian ANSYS dibandingkan. Pada dasarnya, tekanan dan kegagalan lesu kekuatan maksimum dikira pada dua titik kritikal pada aci input yang ada di atas gear gigi pada bahagian splin dan di filet di antara bebibir dan aci. Tekanan bersamaan von Mises maksimum dikira atas filet adalah 72.49 MPa manakala tegasan prinsipal maksimum adalah 41.98 MPa. Berbanding dengan keputusan daripada analisis ANSYS, nilai maksimum bagi tekanan bersamaan von Mises adalah 70.08 MPa manakala nilai tegasan prinsipal maksimum adalah 41.195 MPa. Oleh itu, perbezaan peratusan daripada kedua-dua analisis terletak dalam 1.87% dan 3.32%. Faktor-faktor keselamatan untuk kehidupan infiniti dikira adalah 14.8 dan 1.64 pada filet dan pada gear-gigi masing-masing. Aci input diandaikan tidak akan gagal dan boleh bertahan dengan beban yang dikenakan. Seterusnya, bahagian akhir karya ini adalah pembuatan komposit acuan pemutar bilah untuk panjang 10 kaki. _______________________________________________________________________________________________________ The purpose of this thesis is to design and analyse the clutch system for the Ultralight Helicopter (ULH). The clutch system is expected to be able to transfer 50 Nm torque from the engine gearbox to the counter-rotating gearbox of the Ultralight Helicopter (ULH). After the development of the clutch system, the fatigue analysis on the input shaft is performed. The analysis on the extendable shaft are also being done to study at which position of the sliding sleeve on the extendable shaft connector contributes to the highest side reaction force that can lead to fatigue failure. Generally the analysis of fatigue failure is done using manual calculation only. The result of stress calculation of the manual calculation and from ANSYS software are being compared. Basically, maximum stress and fatigue failure strength is calculated on two critical points on the input shaft which are on the gear-tooth of spline part and at the fillet between the flange and the shaft. The maximum equivalent von Mises stress calculated on the fillet is 72.49 MPa whereas the maximum principal stress is 41.98 MPa. Compared to the result from the ANSYS analysis, the maximum value for equivalent von Mises stress is 70.08 MPa whereas the value of maximum principal stress is 41.195 MPa. Thus, the percentage difference from both analysis is within 1.87% and 3.3%. The safety factors for infinite life calculated are14.8 and 1.64 fillet and at gear-tooth respectively. The input shaft is assumed will not fail and can withstand with the applied load. On the other hand, the last part of this thesis is the fabrication of the composite rotor blade mould for the length of 10 ft
Contributor(s):
Salma Said - Author
Primary Item Type:
Final Year Project
Identifiers:
Barcode : 00003105263
Accession Number : 875006756
Language:
English
Subject Keywords:
clutch system; Ultralight Helicopter (ULH); counter-rotating gearbox
First presented to the public:
6/1/2016
Original Publication Date:
5/15/2018
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Aerospace Engineering
Citation:
Extents:
Number of Pages - 66
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2018-05-15 10:20:19.434
Date Last Updated
2020-04-30 14:53:38.998
Submitter:
Mohd Jasnizam Mohd Salleh

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Design and fatigue analysis of clucth system and fabrication of composite rotor blade mould of ultra-light helicopter1 2018-05-15 10:20:19.434