Load capacity calculation of spur gears and bevel gears according to DIN 3990

The gear tooth profile has an immense effect on the main operating parameters of gear pairs (load capacity, working life, efficiency, vibrations, etc). In current engineering research and practice, there is a strong need to develop methods for tooth profile optimization. In this paper a new method for selecting the optimal tooth profile parameters of spur gears is described. This method has been named the Explicit Parametric Method (EPM). The addendum modification coefficient, radius of root curvature, and pressure angle of the basic rack for cylindrical gears, have been identified as the main tooth profile parameters of spur gears. Therefore, the EPM selects the optimal values for these three tooth profile parameters. Special attention has been paid to develop a method of adjustment for the particular working conditions and explicit optimization requirements. The EPM for optimal tooth profile parameters of gears uses contact nonlinear Finite Element Analysis (FEA) for calculation of deformations and stresses of gear pairs, in addition to explicit comparative diagrams for optimal tooth profile parameter selection.

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Bending Fatigue Tests of High Speed Spur Gears

Journal of Mechanical Design ◽

10.1115/1.3254941 ◽

1981 ◽

Vol 103 (2) ◽

pp. 466-473 ◽

Cited By ~ 3

Author(s):

I. Yuruzume ◽

H. Mizutani

Keyword(s):

High Speed ◽

Normal Load ◽

Load Capacity ◽

Spur Gear ◽

Fatigue Tests ◽

Spur Gears ◽

Bending Fatigue ◽

Tooth Width ◽

Bending Load ◽

Bending Fatigue Strength

Effects of addendum modification of tooth profiles on the bending fatigue strength of high speed spur gear are discussed in this presentation: A JIS Class O Spur gear of m3, α20 deg, Z1 27, and made of AMS 6260 (AISI 9310) steel precisely ground after carburizing and hardening was meshed with the other gear of Z2 77 and operated at 8550 rpm. In this running test, bending load capacity and running performance comparisons between the gear with standard tooth profile and the two shifted gears of which tooth addendum modification coefficients were 0.35 and 0.8. The maximum normal load of the gear with addendum modification coefficient 0.8 at 107 (10 million) cycles was 1.8 kNsmm per unit tooth width. The maximum Hertz stress of this gear was 2.43 × 109 Nsm2. The allowable normal load of the gear with 0.8 was higher than that of the standard gear by 87 percent and higher than of the 0.35 profile shifted gears by 20 percent.

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Pitting Load Capacity of Helical Gears

Volume 7: 10th International Power Transmission and Gearing Conference ◽

10.1115/detc2007-34560 ◽

2007 ◽

Author(s):

Bernd-Robert Ho¨hn ◽

Peter Oster ◽

Gregor Steinberger

Keyword(s):

Calculation Method ◽

Load Distribution ◽

Load Capacity ◽

Test Results ◽

Calculation Methods ◽

Helical Gears ◽

Capacity Calculation ◽

Overlap Ratio ◽

Tooth Flank

In experimental analyzes the pitting load capacity of case carburized spur and helical gears is determined in back-to-back test rigs. The research program with one type of spur and 8 types of helical gears includes tests for the determination of influences of varying load distribution, overlap ratio and transmission ratio. The test results are presented and evaluated on the basis of the pitting load capacity calculation methods of ISO 6336-2/DIN 3990, part 2. A new DIN/ISO compatible calculation method for pitting load capacity is presented. This new calculation method comprehends helical gears more adequate than ISO 6336-2 / DIN 3990, part 2 and has the possibility to consider tooth flank modifications. The new calculation method is applied on test results and gears of a calculation study. It shows better accordance with the experimental test results than the present ISO 6336-2 / DIN 3990, part 2.

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KAJIAN DAYA TAMPUNG BEBAN PENCEMARAN SUNGAI CIBEUREUM DAS CITARUM DI SEKTOR PERTANIAN

Jurnal Teknologi Lingkungan Lahan Basah ◽

10.26418/jtllb.v7i2.35585 ◽

2019 ◽

Vol 7 (2) ◽

pp. 072

Author(s):

Ajeng Alya Hidrijanti ◽

Iwan Juwana ◽

Yenita Sandra Sari

Keyword(s):

Spatial Planning ◽

Agricultural Sector ◽

Load Capacity ◽

Pollution Load ◽

Total N ◽

Polluted River ◽

Pollutant Load ◽

Agriculture Sector ◽

Capacity Calculation ◽

Total P

Abstract Cibeureum watershed is a river located on the border of Cimahi City and Bandung City and empties into the Citarum River. One of the Cibeureum watersheds is from the agriculture sector. Rice fields and gardens in South Cimahi are contributors to pollution in the Cibeureum Sub-watershed. Research on the assessment of pollution load capacity in the Cibeureum Sub-watershed to learn to understand and analyze the burden of the agricultural sector. In addition, the study of the capacity of pollution load in the Cibeureum River has never been carried out, so it is necessary to conduct a study of capacity. Calculation of pollutant load requires data on the area of paddy fields and gardens, emission factors and the number of planting days. Cibeureum watershed is a heavily polluted river after being calculated using pollutant methods with 11.09 results. Pollutant load of Cibeureum Sub-watershed agriculture sector in 2018 is 0.01689 kg/day BOD, 0.001501 kg/day Total-N, 0.0008 kg /day Total-P, and 0.000003 kg /day TSS. Pollutant load for Cibeureum Sub-watershed agriculture sector in 2018 is 0.103377 kg/day BOD, 0.009542 kg/day Total-N, 0.0048 kg/day Total-P, and 0.00508kg/day TSS. Pollutant load generated from the agricultural sector in the year of allocation will not be excluded from the budget for the development of Cimahi City Regulation Number 4 of 2013 concerning Spatial Planning and Cimahi City Areas for 2012-2032. Keywords: Pollutant Load, Agriculture Sector, Cibeureum Sub-watershed, Indonesia AbstrakSub DAS Cibeureum merupakan sungai yang berada di perbatasan Kota Cimahi dan Kota Bandung dan bermuara ke Sungai Citarum. Pencemar yang masuk ke Sub DAS Cibeureum salah satunya berasal dari sektor pertanian. Sawah dan kebun yang berada di Cimahi Selatan merupakan kontributor terhadap pencemaran di Sub DAS Cibeureum. Penelitian kajian daya tampung beban pencemaran di Sub DAS Cibeureum bertujuan untuk mengetahui dan menganalisis beban pencemar dari sektor pertanian. Selain itu, kajian daya tampung beban pencemaran di Sungai Cibeureum belum pernah dilakukan sehingga perlu dilakukan kajian daya tampung. Perhitungan beban pencemar membutuhkan data luas lahan sawah dan kebun, faktor emisi dan jumlah hari tanam. Status mutu Sungai Cibeureum adalah sungai yang tercemar berat setelah dilakukan perhitungan menggunakan metode indeks pencemar dengan hasil 11,09. Beban pencemar sektor pertanian sawah Sub DAS Cibeureum pada tahun 2018 sebesar 0,01689 kg/hari BOD, 0,001501 kg/hari Total-N, 0,0008 kg/hari Total-P, dan 0,000003 kg/hari TSS. Beban pencemar sektor pertanian kebun Sub DAS Cibeureum pada tahun 2018 sebesar 0,103377 kg/hari BOD, 0,009542 kg/hari Total-N, 0,0048 kg/hari Total-P, dan 0,00508 kg/hari TSS. Beban pencemar yang dihasilkan dari sektor pertanian pada tahun proyeksi tidak dijelaskan akan direncanakan mengalami peningkatan luas lahan dalam Peraturan Daerah Kota Cimahi Nomor 4 Tahun 2013 tentang Rencana Tata Ruang dan Wilayah Kota Cimahi Tahun 2012-2032 sehingga beban pencemar di tahun proyeksi tetap sama seperti tahun 2018. Kata Kunci: Beban Pencemar, Sektor Pertanian, Sub DAS Cibeureum, Indonesia

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EVALUATION OF LOAD-BEARING CAPACITY OF THE STEEL CONSTRUCTION JOINTS ON THE BASIS OF COMPONENT METHOD

Municipal economy of cities ◽

10.33042/2522-1809-2021-1-161-19-24 ◽

2021 ◽

Vol 1 (161) ◽

pp. 19-24

Author(s):

Y. Solodovnyk ◽

V. Riumin ◽

V. Nikichanov

Keyword(s):

Load Capacity ◽

Design Procedure ◽

Design Codes ◽

Calculation Algorithm ◽

Yield Line ◽

Component Method ◽

Capacity Calculation ◽

Complex Phenomena ◽

Steel Joints ◽

Connection Design

Connections are essential in every kind of steel constructions. Structure is a constructed assembly of joints separated by members which implies the importance of connections. Three basic parameters describe the behavior of connections: strength, stiffness and ductility, and the mechanical behavior of steel joint in those terms are complex phenomena. It must be said that absence in current Ukrainian design codes rules for the load capacity calculation of steel constructions connections led to some difficulties in project decisions. On the basis of component method, which lay in the EC3 design codes load capacity estimation of beam to column connection was made. According to component method beam to column connection divided into basic components. EN 1993 -1-8 provides a good overview of different components. Most important components for bolted steel joints are the plates and bolts which both are considered by the design of a T-stub through the “Equivalent T-stub in tension”. The procedure of load capacity calculation used yield line formulations to determine resistance of the following basic components: column flange in bending, end plate in bending, column flange in bending, column web in tension, column web in compression, beam flange in compression. Failure by this method is described by yield-line models depending on geometry of plates and bolts. Obtained analytical results were compared with the results obtained by means of specialized software and it shown their adequacy. It must be noted that presented in EC3 calculation algorithm of beam to column connection is time consumable for domestic designer also designer must have knowledge about features of connection design in countries of EC. The choice of design procedure depends on the time effort and thereby to the designer preferences.

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