Study on Development and Testing Mechanism of a New Multifunction Agricultural V-Belt Fatigue Testing Machine

2014 ◽  
Vol 527 ◽  
pp. 185-189
Author(s):  
Wei Feng Zhang ◽  
Fu Xia Zhang ◽  
Ying Jie Lv ◽  
Feng Feng Bao
Keyword(s):  
Basic Principle ◽  
Fatigue Testing ◽  
Testing Machine ◽  
Service Condition ◽  
Structural Features ◽  
Testing Equipment ◽  
Fatigue Performance ◽  
Agricultural Machinery ◽  
Testing Methods ◽  
Loading Mode

Agricultural V-belt fatigue testing machine is a kind of testing equipment developed based on the service condition of the agricultural V-belt, for the detection of fatigue performance of agricultural V-belt. The paper firstly analyzes the transmission principle, loading mode and testing parameters of the agricultural V-belt fatigue testing machine, and then introduces its basic principle, detection parameters and the main structural features, based on which the fatigue performance of the agricultural V-belt is tested and perfectly checked by the testing result. The study is to improve the testing equipment and testing methods for testing the fatigue performance of our national agricultural V-belt, to enhance the overall testing ability in China's agricultural machinery industry and to guide the production and use of agricultural V-belts.

Fatigue Behaviour of Some Fe-Based Metallic Glass Wires

2002 ◽  
Vol 754 ◽  
Author(s):  
J. A. Verduzco ◽  
R. J. Hand ◽  
H. A. Davies
Keyword(s):  
Fatigue Testing ◽  
Glassy Alloy ◽  
Testing Machine ◽  
Fatigue Behaviour ◽  
Fatigue Performance ◽  
Cr Content ◽  
Amorphous Wires ◽  
Steel Wires ◽  
Melt Spun ◽  
Corrosion Pits

ABSTRACTThe fatigue behaviour of melt-spun Fe78-xCrxSi10B12 and Fe77.5-xCrxSi7.5B15 (0≤×≤8) amorphous alloy wires is compared with those of HT steel wires. The wires were tested in a novel bend fatigue testing machine that imparts compressive to tensile stresses. Tensile strength and microhardness were also measured; these and the fatigue performance improved with the substitution of Fe by Cr. The fatigue performance of the glassy alloy wires was generally similar to that of HT steel wires when expressed on the basis of bend strain but inferior when expressed on the basis of bend stress. Fractography studies revealed differences in the fracture surface features for the amorphous wires, depending on the stress range amplitude. It was also observed that corrosion pits nucleated on the surfaces of glassy wires with zero or low Cr content and resulted in crack initiation at these points.

The Experimental Study of 15CrMo Steel Fatigue Performance

2013 ◽  
Vol 716 ◽  
pp. 214-217
Author(s):  
Meng Yuan Gu ◽  
Xiao Yang Li ◽  
Hui Ping Yu
Keyword(s):  
Fatigue Limit ◽  
Stress Ratio ◽  
Fatigue Testing ◽  
Testing Machine ◽  
Axial Loading ◽  
Fatigue Performance ◽  
Analysis Method ◽  
Limit Theory ◽  
Theoretical Support ◽  
Limit Analysis Method

15CrMo steel is widely used in engineering. In order to evaluate the fatigue performance of 15CrMo, axial loading for 15CrMo specimen has applied by high frequency fatigue testing machine under stress ratio R=0.1 at room temperature, the linear S-N relationship has obtained by grouping fatigue test, the fatigue limit has obtained and compared by two different fatigue limit analysis method. The consequences of this test could provide a theoretical support for the use of 15CrMo in engineering and the research of fatigue limit theory.

scholarly journals Analysis of Torque Maintenance and Fracture Resistance after Fatigue in Retention Screws Made of Different Metals for Screw-Retained Implant-Borne Prosthesis Joints

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Maria Beatriz Bello Taborda ◽  
Gabriela Sumie Yaguinuma Gonçalves ◽  
Cecília Alves de Sousa ◽  
Wirley Gonçalves Assunção
Keyword(s):  
Fracture Resistance ◽  
Fatigue Testing ◽  
Testing Machine ◽  
Compression Testing ◽  
Testing Methods ◽  
Mechanical Cycling ◽  
Universal Testing ◽  
Grade 5 ◽  
Alloy Material ◽  
Connection Type

Purpose. The aim was to evaluate the effect of different metallic alloys used in the manufacture of retention screws for universal cast to long abutment (UCLA) abutments for external hexagon (HE) and Morse taper (MT) connection implants, as well as of mechanical cycling on torque maintenance and fracture resistance through electromechanical fatigue testing by mastication followed by compression testing. Methods. Sixty implants were used, 30 MT and 30 HE, with their respective titanium UCLA abutments and retention screws of 5 different materials (n = 6): Ti cp grade 2, Ti cp grade 4, Ti cp grade 4 hard, Ti grade 5—Ti6Al4V and surgical steel (DSP® Biomedical). The assemblies were positioned in an electromechanical masticatory fatigue testing machine. The fracture strength test was performed by compression testing in a universal testing machine EMICDL-200. Results. The cycled screws and new screws of each alloy group for each connection type were evaluated, obtaining the maximum force (FM), in order to verify the effect of mechanical cycling. The data were tabulated and submitted to appropriate statistical analysis (α = 0.05). Conclusion. It was concluded that for the MT, the alloy with the best performance was steel, both in the maintenance of torque and in the compression test, and cycling negatively influenced the maintenance of preload for this connection. The alloy material did not influence torque maintenance for HE. The new screws that were subjected to EMIC showed higher strength. The alloy with the lowest strength was Ti grade 2.

The Fatigue Performance Evaluation of Pressure Vessel Steel Using Modified Staircase Method

2014 ◽  
Vol 989-994 ◽  
pp. 879-882
Author(s):  
Huan Xue ◽  
Rong Feng Li ◽  
Li Xin Wu ◽  
Wen Jie Peng ◽  
Jing Qing Huang
Keyword(s):  
Performance Evaluation ◽  
Pressure Vessel ◽  
Fatigue Testing ◽  
Fatigue Performance ◽  
Pressure Vessel Steel ◽  
Testing Methods ◽  
Staircase Method ◽  
Vessel Steel ◽  
Testing Efficiency

Increasing attention has been paid on fatigue performance evaluation in the recent years. More efficient fatigue testing methods are imperatively needed to accomplish the test requirement. The modified staircase theory is introduced in this paper. Traditional staircase method and modified staircase method are respectively used to evaluate the fatigue performance of pressure vessel steel Q345R. Results show the fatigue limits are 194MPa and 193MPa respectively, which indicates the modified staircase method can enhance the testing efficiency about 50% and keep the test veracity.

On a New Rotating Bending Fatigue Testing Machine

1966 ◽  
Vol 15 (148) ◽  
pp. 49-54
Author(s):  
Minoru KAWAMOTO ◽  
Katsumi SUMIHIRO ◽  
Koji KIDA
Keyword(s):  
Fatigue Testing ◽  
Testing Machine ◽  
Bending Fatigue ◽  
Rotating Bending Fatigue ◽  
Rotating Bending

scholarly journals Fatigue Stress-Life Model of RC Beams Based on an Accelerated Fatigue Method

2019 ◽  
Vol 4 (2) ◽  
pp. 16
Author(s):  
Eljufout ◽  
Toutanji ◽  
Al-Qaralleh
Keyword(s):  
Cyclic Loading ◽  
Fatigue Testing ◽  
Three Dimensional ◽  
Rc Beam ◽  
Rc Beams ◽  
Testing Methods ◽  
Load Range ◽  
Fatigue Stress ◽  
Life Model ◽  
Prediction Band

Several standard fatigue testing methods are used to determine the fatigue stress-life prediction model (S-N curve) and the endurance limit of Reinforced Concrete (RC) beams, including the application of constant cyclic tension-tension loads at different stress or strain ranges. The standard fatigue testing methods are time-consuming and expensive to perform, as a large number of specimens is needed to obtain valid results. The purpose of this paper is to examine a fatigue stress-life predication model of RC beams that are developed with an accelerated fatigue approach. This approach is based on the hypothesis of linear accumulative damage of the Palmgren–Miner rule, whereby the applied cyclic load range is linearly increased with respect to the number of cycles until the specimen fails. A three-dimensional RC beam was modeled and validated using ANSYS software. Numerical simulations were performed for the RC beam under linearly increased cyclic loading with different initial loading conditions. A fatigue stress-life model was developed that was based on the analyzed data of three specimens. The accelerated fatigue approach has a higher rate of damage accumulations than the standard testing approach. All of the analyzed specimens failed due to an unstable cracking of concrete. The developed fatigue stress-life model fits the upper 95% prediction band of RC beams that were tested under constant amplitude cyclic loading.

Prototype of Compact Flexural Fatigue Testing Machine

2014 ◽  
Vol 554 ◽  
pp. 350-354
Author(s):  
Muhammad Azrie Husainy Mohd Jasri ◽  
Mohd Afendi ◽  
A.H.M. Fauzi
Keyword(s):  
Fatigue Failure ◽  
Electromagnetic Force ◽  
Fatigue Testing ◽  
Testing Machine ◽  
Working Environment ◽  
Motion Sensor ◽  
Flexural Fatigue ◽  
The Real ◽  
The Cost ◽  
Dynamic Fatigue

The purpose of this project is to build a prototype of compact flexural fatigue testing machine and to strive for an easy working-environment as required by the users besides cutting the cost of the machining. This particular project is about to build the prototype of compact flexural fatigue testing machine in compact mode. In this project, the prototype will be functioning 60% similar to the real fatigue machine which is Dynamic Fatigue Testing Machine (INSTRON) due to timer counter, frequency and load applied. But the new invention is this prototype was using the concept of electromagnetic force relay that will apply to the specimen using the application of basic electronics. The motion sensor also being applied to this prototype to achieve accurate results when the specimen breaks up after undergoes a fatigue failure.

Surface Durability of Spur Gears at Hertzian Stresses Over Shakedown Limit

1974 ◽  
Vol 96 (2) ◽  
pp. 359-372 ◽  
Author(s):  
Akira Ishibashi ◽  
Taku Ueno ◽  
Shigetada Tanaka
Keyword(s):  
Fatigue Testing ◽  
Testing Machine ◽  
Carbon Steels ◽  
Rolling Contact ◽  
Hertzian Contact ◽  
Load Testing ◽  
Short Period ◽  
Hertzian Contact Stress ◽  
Surface Durability ◽  
Shakedown Limit

Using a new type of gear-load testing machine and a disk-type rolling fatigue testing machine designed and made by the authors, the upper limits of Hertzian contact stress allowable on rolling contact surfaces were investigated. It was shown conclusively that gears and rollers made of soft carbon steels could be rotated beyond 108 revolutions at Hertzian stresses over shakedown limit (≈ 0.4 HB). In the case of gears, pits having a pitting area ratio of 0.04 percent occurred during 1.16 × 108 rotations at a Hertzian stress of 0.50 HB. However, no pitting occurred on the roller rotated through 1.20 × 108 revolutions at a Hertzian stress of 0.71 HB, although appreciable changes in texture were observed at the subsurface. In order to rotate gears or rollers at Hertzian stresses over shakedown limit, their surface must either be very smooth initially or after a short period of running, and an oil film must be formed between contacting surfaces.

Sign in / Sign up

Export Citation Format

Share Document