The Design of Fatigue Strength Machine Being One of the Methods for Determining the Mechanical Properties of the Materials Used in the Industry (original) (raw)

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...

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.

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.

Fabrication and Analysis of Fatigue Testing Machine

Engineering of machines and structures needs to consider the impact of fatigue stresses to prevent catastrophic failures for this we make use of fatigue testing machine, this machine will determine the strength of materials under the application of cyclic load. Specimens are subjected to repeated varying forces or fluctuating loading of specific magnitude and the stress cycles to destruction are counted. In this project we have fabricated and analyzed the performance of the fatigue testing machine. To determine the efficiency of the machine, specimens various materials were taken and tested with initial test, at a stress value that is under the material's ultimate strength. Then the next test is made at a stress that is less that than that used in the first. The process is repeated with the values of stress decreasing and results are plotted.

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.

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...

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...

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.