Fabrication and Analysis of Fatigue Testing Machine (original) (raw)
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Design and Fabrication of Fatigue Testing Machine
International Journal of Scientific Research in Science, Engineering and Technology, 2020
Many engineering machines and mechanical components are subjected to fluctuating stresses, taking place at relatively high frequencies and under these conditions failure is found to occur. This is called fatigue failure. And this led to the invention of a fatigue testing machine. In view of effective design that will not fail accidentally, this research is conceived. This testing machine will determine the strength of materials under the action of fatigue load. Specimens are subjected to repeated varying forces or fluctuating loading of specific magnitude while the no. of cycles are counted till the breakage of specimen and results are plotted.
Development of a fatigue strength testing machine
Nigerian Journal of Technology
A profound engineering design and modeling of fatigue strength machine for testing the failure which occurs when a metallic material is subjected to cyclic stresses is presented. The main goal is developing a locally made fatigue strength machine that can be used in material science laboratory. A major direction in this development of the machine is the ability to thread on the path of technology transfer and dominance by concentrating on the building of indigenous capacity. In carrying out the machine development, engineering design formulae were applied and Computer Aided Design modeling was developed. The developed fatigue strength testing machine had a designed machine capacity of 18875Nmm that sustained a motor power of 5.93kw.The machine shaft diameter determined to be 9.88mm developed an equivalent torque and bending moment of 45799.8Nmm and 40890Nmm respectively. The machine designed critical speed of 23.52rad/s had belt tensions on the tight and slack sides to be 139.02N an...
Machine parts fail to perform their tasks due to the fatigue with the rate of 90%. The fatigue applications have been known since the early days of the industrial revolution. The field of study on metal fatigue has started to expand due to the increase in the use of steel constructions in the systems of railway bridges in particular. It is of critical importance for all of the engineering fields to produce designs against the fatigue. Moreover, it is quite difficult to determine the initial damages of the fatigue by way of observation and the initial damages of the fatigue cannot be mostly recognized until a structural component becomes unusable. Therefore, the determination of fatigue life of the structural members during the stage of design and development results in a considerable decrease in unexpected damage risk that may occur during the use. Thus, reliable methods which can accurately predict the fatigue life are required. However, it is very difficult to find one single method to determine the fatigue life because of the presence of different loads and different designs. Finding a generally accepted and unified method which can accommodate to the desired condition removes difficulties in determining the fatigue life for each of the designs separately and facilitates the design process against the fatigue. The fatigue strength is normally found by means of " Wöhler method ". It is also called as the method of (S-N) curves. In this method, each of test parts which are completely same in terms of material, shape and the quality of surface are continually forced to the stress at different levels and the number of cycles with which the fracture occurs is determined. In this study, a bending fatigue strength machine was designed in accordance with the method of Wöhler curve. A linear motor enabling a linear movement was used in the bending fatigue testing machine. The designed bending fatigue machine was different from the existing machines in terms of not occupying much area, noise being lower, non-requirement of the additional apparatus (strap, camshaft, etc.) as the movement is linear; determination of the force applied on the test sample directly in computer software and easiness of the measurement and obtaining data such as on which life number the test sample fractured.
Design and Development of Fatigue Machine: Rotating Bending Fatigue Testing of Different Materials
international journal of advanced engineering and management, 2019
Fatigue fracture is the most common type of failure as more than 75-90% of documented materials' failure in engineering components due to cyclic loading. So, it is preeminent to test the materials before use. This research work has been done in order to design and fabricate "Rotating Bending Fatigue Testing Machine" which is simple to understand, perform, portable, safe for use and more economical than others. A rotating bending fatigue testing machine was developed by keeping in mind the basic concepts of technical theory of bending of elastic beams. Different specimens of 6mm to 8mm diameter of different materials were tested under various loads to analyse the performance of this machine. The experimental readings and theoretical calculations indicate that the results were promising to agreement of the objective had been achieved. It was detected that the machine has the abilities of generating reliable bending stress-number of cycles data; and the cost of design (31,500 PKR) was lower in evaluation to that of rotating bending machines from abroad.
Design and Development of Fatigue Machine: Rotating Bending Fatigue Testing on different Materials
2019
Fatigue fracture is the most common type of failure as more than 75-90% of documented materials' failure in engineering components due to cyclic loading. So, it is preeminent to test the materials before use. This research work has been done in order to design and fabricate "Rotating Bending Fatigue Testing Machine" which is simple to understand, perform, portable, safe for use and more economical than others. A rotating bending fatigue testing machine was developed by keeping in mind the basic concepts of technical theory of bending of elastic beams. Different specimens of 6mm to 8mm diameter of different materials were tested under various loads to analyse the performance of this machine. The experimental readings and theoretical calculations indicate that the results were promising to agreement of the objective had been achieved. It was detected that the machine has the abilities of generating reliable bending stressnumber of cycles data; and the cost of design (31,500 PKR) was lower in evaluation to that of rotating bending machines from abroad.
A Review on Design and Fabrication of Fatigue Testing Machine
2018
Simpler Design arrangement was used and Rotating Bending Fatigue Test (R.B.F) machine was fabricated using local availability of raw materials to make design arrangement simpler, due of its higher market Price. The design approach was simpler in construction .Power was transmitted though vertically arranged pulley arrangement where it is further transferred to load transmitting members through universal joint. Rotating Mandrel for specimen holding , was press fitted inside the two bearings which are separated apart. Bearing Hub was supported on horizontal lever through bolted connection at either side .One end of Lever is hinged and supported on vertical structure. This design helped in understanding Dynamic scatter and their Prevention on these fatigue machines. Frequent Maintenance showed better performance for longer runs. Scatter observed in Machine can help to overcome by the operator itself. This design made a better understanding for correlation with experiment results. Exper...
Design and Fabrication of Rotating Bending Fatigue Testing Machine-A Laboratory Development Project
Fatigue failures are reported to account for more than 75% of documented materials failures of which a great percent occur catastrophically. Study of fatigue life is essential in many industrial and specialized fields such as aerospace, defense, power generation etc. Fatigue life of a component can be found by various fatigue testing machines based on the loading condition. In the present study a low-cost four point loading rotating bending fatigue testing machine is designed, fabricated and tested. The design principle is based on the adaptation of the technical theory of bending of elastic beams. The machine performance was evaluated using test specimens which were machined in conformity with standard procedures. It was observed that the machine has the potentials of generating combined bending and torsional stress. Specimens of diameter varying between 6 to 8 mm where subjected to loads between 30Kgs to 90Kgs and the number of cycles to failure was found by both experimental meth...
IJERT-Design and FEA Analysis of Fatigue Testing Machine
International Journal of Engineering Research and Technology (IJERT), 2021
https://www.ijert.org/design-and-fea-analysis-of-fatigue-testing-machine https://www.ijert.org/research/design-and-fea-analysis-of-fatigue-testing-machine-IJERTV10IS020194.pdf This project is based on the design & modification of major components of fatigue testing machine and also to reduce the vibration level in the machine. Major components such as spindle, coupling, base frame, chuck, weight hanger, bearing are to be redesigned, manufactured & selected from the standard catalogues. This work also focus on reduction of vibration level in the machine and the analysis of the machine is to be carried out by using the FEA software. Final assembly of the machine is to be carried out using standard assembly methodology and machine is to be calibrated for standard no. of cycles referring previous result. The testing of material aqua alloy 17 is to be checked using the standard specimens for particular loading conditions.
DESIGN AND FABRICATION OF FATIGUE TESTING MACHINE FOR SHEETMETAL
International Research Journal of Engineering and Technology (IRJET), 2019
The aim of this work is to discuss the principle of fatigue failure, research the state of the art fatigue testing methods and finally designs a verification fatigue test setup to evaluate the performance of the newly developed standard fatigue testing machine having Indian standards. A comprehensive study of the underlying principle, stages and numerous factors that makes fatigue such a complex phenomenon was carried out. This was closely followed by research work on the standard fatigue testing methods and statistical analysis of fatigue test results. Based on the knowledge from the project work stated above, a four-point fully reversed bending setup design was developed to put into test the functionality of the dynamic testing machine once it is ready to run and also a planned fatigue test suitable for laboratory exercise in a material science or engineering design class was developed.