Fatigue Design of Machine Elements

1982 ◽  
Vol 14 (5) ◽  
pp. 3-11
Author(s):  
C. Bagci
Keyword(s):  
Fatigue Design ◽  
Machine Elements

scholarly journals Comparison of Safety Factor Values for Soderberg and DIN 743 Fatigue Analyses

2021 ◽  
Vol 7 (2) ◽  
pp. 11-21
Author(s):  
Beatriz Henriques ◽  
Mariana Carvalho ◽  
Sérgio Tavares ◽  
Paulo De Castro
Keyword(s):  
Safety Factor ◽  
Cyclic Load ◽  
High Cycle Fatigue ◽  
Load Capacity ◽  
Cyclic Loads ◽  
Correction Factors ◽  
Fatigue Design ◽  
Different Types ◽  
Machine Elements ◽  
Critical Aspects

Fatigue phenomena are critical aspects of the life cycle of many components or structures. The variety of cyclic load situations led to the emergence, throughout the years, of different types of studies as high-cycle, low-cycle, and fatigue crack growth, among others. Particularly for machine elements, high-cycle fatigue situations are the more frequent, and simplified approaches taking into account the Soderberg criterion have been commonly used. Meanwhile, the German Institute for Standardization put forward a procedure for fatigue design of shafts, DIN 743, based on the use of Smith diagrams and considering separately the safety factor (SF) for static and for cyclic loads. The present paper compares Soderberg and DIN 743 approaches, focusing on SF obtained when load capacity is calculated considering equal correction factors in both methods. A set of representative situations was defined, and the comparison was carried out parametrically using Matlab software. The SF values of the Soderberg method were always found to be lower than those of DIN 743, indicating that the Soderberg method is more conservative than DIN 743.

ANALYSIS OF AUTOMATIC TRANSMISSION USING FOURIER TRANSFORM INFRARED (FTIR) SPECTROCOPY

2019 ◽  
Vol 7 (SI-TeMIC18) ◽  
Author(s):  
Norhanifah Abdul Rahman ◽  
Matzaini Katon Katon ◽  
Nurina Alya Zulkifli Zulkifli
Keyword(s):  
Fourier Transform ◽  
Automatic Transmission ◽  
Fourier Transform Infrared ◽  
Oil Analysis ◽  
Wear Particles ◽  
Reliable Technique ◽  
Fluid Analysis ◽  
Analysis Technique ◽  
Machine Elements ◽  
Transmission Fluid

Automatic Transmission (AT) system is efficient in the aspects of vehicle safety, comfort, reliability and driving performance. The objectives of this paper are to collect the oil samples from AT systems of engine bus according to manufacturer's recommendations and analyse collected oil samples using oil analysis technique. The sample transmission fluid which was taken from the AT gearbox has been experimentally analyzed. The oil samples were taken with an interval of 5,000km, 30,000km, 50,000km, 80,000km, 180,000km and 300,000km for AT bus operation. These samples then have been analyzed by comparing between new and used transmission fluid using Fourier Transform Infrared (FTIR) spectroscopy. Oil analysis by FTIR is a form of Predictive Maintenance (PdM) to avoid major failure in machine elements. Most machine elements are not easily accessible in the transmission system. Having a reliable technique would avoid the needs to open the components unnecessarily, hence, help to prevent catastrophic failure which are very costly, and ease of regular monitoring. In order to identify the major failures of automatic gearbox, forecasts can be made regarding the lube transmission fluid analysis test. By using this test, the minor problems can be determined before they become major failures. At the end of this research, the wear particles profile for interval mileage of AT system was obtained. Keywords: Wear, Automatic Transmission (AT), Transmission fluid, Fourier Transform Infrared (FTIR), Oil analysis.

Fatigue Design Applied to A 5083-O/A 5183 Stiffened Plate Structure

1983 ◽  
Vol 1983 (153) ◽  
pp. 268-280
Author(s):  
Keiichi Sakai ◽  
Takeshi Uemura ◽  
Nobu Iino ◽  
Osamu Ushirokawa ◽  
Takayoshi Miyanari ◽  
...  
Keyword(s):  
Stiffened Plate ◽  
Plate Structure ◽  
Fatigue Design

Increasing in wear resistance of excavating machine elements

2020 ◽  
pp. 306-308
Author(s):  
V.S. Bochkov
Keyword(s):  
Wear Resistance ◽  
Wear Rate ◽  
Abrasive Wear ◽  
Thermomechanical Treatment ◽  
Cold Work ◽  
Hadfield Steel ◽  
Outer Side ◽  
Viii And Ix ◽  
Machine Elements ◽  
The Impact

The relevance of the search for solutions to increase the wear resistance of bucket teeth of excavating machine type front shovel is analyzed. The reasons for the wear of the teeth are considered. It is determined that when excavating machines work for rocks of VIII and IX categories, impact-abrasive wear of the inner side of the teeth and abrasive external wear occurs. It is proved that the cold-work hardening of Hadfield steel (the teeth material), which occurs during the excavating machine teeth work in the rocks of VIII and IX categories, reduces the impact-abrasive wear rate on the inner side of the teeth and does not affect the abrasive wear of the outer. The methods for thermomechanical treatment of the outer side of the excavating machine tooth is proposed. It can increase the wear resistance of Hadfield steel (110G13L) up to 1.7 times and lead to the self-sharpening effect of the tooth due to equalization of the wear rate of the outer and inner parts of the tooth. The efficiency factor of thermomechanical treatment to reduce the of abrasive wear rate of Hadfield steel is experimentally proved.

Analysis of Fatigue Design Recommendations for Aluminum Weldments with Imperfections

2009 ◽  
Vol 42 (3) ◽  
pp. 31
Author(s):  
Y. U. Pardhi ◽  
P. K. Ghosh ◽  
D. Kosteas
Keyword(s):  
Design Recommendations ◽  
Fatigue Design
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