000			03476cas a2200397 a 4500
005			20260818223030.0
008			110902s1980 th uu|m rtt 0| a1eng d
035			_a.b10650192
099		9	_aAIT Thesis no.AE-80-15
100	1		_aJayasundera, Laxman
245	1	0	_aStudy of factors affecting the design of flat lugged cage wheels in paddy soils
260			_aBangkok : _bAsian Institute of Technology, _c1980
300			_a71 p.
490	1		_aThesis ; _vno. AE-80-15
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development
502			_aThesis (M.Eng.) - Asian Institute of Technology, 1980
520			_aThe factors relating trafficability of flat lugged cage wheels operating on wet saturated soils has been studied. A theoretical model was developed to describe the pull and lift characteristics of cage wheel with respect to lug spacing, lug angle, slip, and sinkage. Experiments on a model of a caged wheel has performed in order to validate the theoretical model. The experimental cage wheel was designed with the capacity to change lug angle (O - 40 deg at the intervals of 10 deg) and lug spacing (20, 30, 40 and 60 deg). Tests on drawbar performance of the wheels were conducted in an experimental puddled plot, where the designed cage wheels were fitted to a 11.4 KW tractor manufactured in Thailand. The experimental results revealed that for a cage wheel of 0.88 m, diameter with lugs of 0.10 m height will provide optimum trafficability about 30 deg lug spacing, and 25-30 range of lug angle. The theoretical model for lift forces did not satisfy the actual conditions where for sinkage values less than the wheel radius (0,44 m). The model showed the soft (with 2cm standing water) top soil layer cannot provide a sufficient lift force to bear the weight of the rear wheels. So it has been concluded that the theoretical analysis concerning the interaction of lug with the hardpan should be done. The theoretical model showed a similar variation in the relationship between draught and lug angle/lug spacing, beyond the lug spacing of 30 deg. Due to the problem of mud trapping in between the lugs, the experimental values for 20 deg lug spacing were very low at all of the lug angles. Except in the case of 20 deg lug spacing, the cage wheel showed better tractive performance than the commercially available cage wheels.
650		0	_aTrafficability
650		0	_aAgricultural machinery
700	1		_aGee-Clough, D., _eChairperson
700	1		_aSingh, Gajendra, _eExamination Committee
700	1		_aKonaka, Toshio, _eExamination Committee
710	2		_aRoyal Government of the Netherlands, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. AE-80-15
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B21911
907			_a.b10650192 _bmnait _cx
902			_a250317
998			_b2 _c951012 _dm _ea _fx _g0
945			_lmnait
945			_lmnarc
942			_c22
942			_c40
909			_aBarcode : 30050120584593 _bCREATED : 2013-08-07 _cRECORD # : i12735760 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
909			_aBarcode : 30050160053327 _bCREATED : 2016-05-18 _cRECORD # : i12982064 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
999			_c114619 _d114619