Fatigue Performance of Tire Belt Cords

1971 ◽  
Vol 44 (4) ◽  
pp. 946-951
Author(s):  
P. A. Lockwood ◽  
W. M. Edmunds ◽  
G. W. Grimm
Keyword(s):  
Fatigue Test ◽  
Fatigue Performance ◽  
New Method ◽  
Laboratory Evaluation ◽  
Performance Rating ◽  
Fall Meeting ◽  
Dynamic Fatigue ◽  
Axial Fatigue

Abstract At the Fall Meeting of the Division in Chicago, the results of a program to develop a new method for evaluating tire belt cords and belt fabric in dynamic axial fatigue were presented. This paper describes the correlation of that test with tires built and tested in wheel and track tests designed, as was the dynamic fatigue test, to fail cords at an accelerated rate. We are encouraged by the correlation which we have observed between the ranking of cords in the laboratory evaluation and the performance rating of tires built with these cords as the belt reinforcement.

scholarly journals Fatigue Resistance Characterization of Warm Asphalt Rubber by Multiple Approaches

2018 ◽  
Vol 8 (9) ◽  
pp. 1495 ◽  
Author(s):  
Jiangmiao Yu ◽  
Xianshu Yu ◽  
Zheming Gao ◽  
Feng Guo ◽  
Duanyi Wang ◽  
...  
Keyword(s):  
Fatigue Test ◽  
Fatigue Resistance ◽  
Crumb Rubber ◽  
Waste Recycling ◽  
Fatigue Performance ◽  
Four Point Bending ◽  
Asphalt Rubber ◽  
Shear Fatigue ◽  
Tensile Fatigue ◽  
Indirect Tensile

Warm asphalt rubber (WAR) mixture is a sustainable paving material with advantages including waste recycling and noise reducing. A comprehensive understanding of the fatigue performance of WAR specimens is helpful to its wide application. However, research on evaluating the fatigue performance of WAR binder and mixtures is very limited. This paper applies five fatigue analysis approaches to evaluate the fatigue life of WAR samples with three different warm mix asphalt (WMA) additives. The conventional G*sinδ, linear amplitude sweep (LAS), indirect tensile fatigue test (ITFT), and four-point bending beam (4PB) test were conducted based on available standards. In addition, a novel shear fatigue test was performed on WAR mortars. Test results indicated that the incorporation of crumb rubber has a significantly positive effect on fatigue resistance. WAR with chemical and foaming additives exhibited a poorer performance than asphalt rubber (AR), but their fatigue performance was still greatly superior to the non-rubberized samples. Finally, LAS as well as mortar shear fatigue and 4PB tests provided the same prediction of fatigue resistance, while the results of G*sinδ and the ITFT were inconsistent. It is recommended to use LAS, the mortar shear fatigue test, and the 4PB test for the fatigue resistance evaluation of rubberized specimens. The validation of the findings with more materials and field performances is recommended.

Method Research on Bending Fatigue Test of Vehicle Steering Wheel

2014 ◽  
Vol 989-994 ◽  
pp. 3029-3032
Author(s):  
Xun Jiong Xu ◽  
Liang Tian
Keyword(s):  
Fatigue Test ◽  
New Method ◽  
Steering Wheel ◽  
Bending Fatigue ◽  
Bending Fatigue Test

Through researches a new method of bending fatigue test of vehicle steering wheel was raised in this paper. The new method is closer to the actual using condition of vehicle steering wheel, which enhances the reliability of the test.

Fatigue Performance of Concrete with Pre-Cracks in Tension-Compression Cycles

2014 ◽  
Vol 584-586 ◽  
pp. 1054-1061
Author(s):  
Jian Shen ◽  
Xiao Yun Liu ◽  
Lang Wu
Keyword(s):  
Fatigue Life ◽  
Fatigue Strength ◽  
Cyclic Loading ◽  
Fatigue Test ◽  
Stress Ratio ◽  
Fatigue Property ◽  
Fatigue Performance ◽  
Cycle Fatigue ◽  
Fatigue Load ◽  
Compression Cycle

A tension-compression cycle fatigue test was performed in order to study the fatigue property of C50 concrete with pre-cracks in cyclic loading. The stress ratio was-1 and the amplitude was 0.2 MPa ~1.30 MPa. The results show that the modified coefficient of fatigue strength is 0.198~0.265 and the infinite life fatigue strength is below 0.45MPa. While the log value of fatigue life is approximately linear with the amplitude of fatigue load stress, the discreteness of fatigue life, the particularity of concrete, has little to do with the amplitude. The S-N, P-N fatigue life curves and the constant fatigue life diagram of pre-crack concrete are obtained.

Fatigue Evaluation of a New Two-Piece Dental Implant, Having a Replaceable Titanium Sleeve

2020 ◽  
Author(s):  
Chaushu Liat ◽  
Chaushu Gavriel
Keyword(s):  
Dental Implants ◽  
Fatigue Test ◽  
Dental Implant ◽  
Load Level ◽  
Endosseous Implant ◽  
Fatigue Evaluation ◽  
Iso 14801 ◽  
Dynamic Fatigue

Abstract A new two-piece dental implant, having a replaceable thin titanium sleeve in its 5mm crestal part was designed. The use of a sleeve of near 0.2mm thickness reduces implant diameter by 0.4mm. Narrower diameter implants may increase the likelihood of component fracture in dental implant systems. 14 two-piece dental implants, with 25° abutment angle were subjected to a dynamic fatigue test according to DIN EN ISO 14801. The highest load at which a runout (non-failure) occurred at 5x106 cycles, amounted to 575 N. According to DIN EN ISO 14801, this load level was confirmed with n=3 samples. The Wöhler curve was determined. Accordingly, the runout at 106 cycles can be anticipated as 625N. The new two-piece Implant B™ design using a 0.2 mm sleeve is compatible with the DIN EN ISO 14801 standard for dimensions of 4.2mm diameter and 13mm length. It withstands dynamic fatigue test at least as good as any other standard endosseous implant.

scholarly journals Influence of defects on axial fatigue strength of maraging steel specimens produced by additive manufacturing

2018 ◽  
Vol 165 ◽  
pp. 02005 ◽  
Author(s):  
Daniele Rigon ◽  
Giovanni Meneghetti ◽  
Michael Görtler ◽  
Daniele Cozzi ◽  
Wolfgang Waldhauser ◽  
...  
Keyword(s):  
Electron Beam ◽  
Fatigue Strength ◽  
Fatigue Test ◽  
Maraging Steel ◽  
Layer By Layer ◽  
Test Results ◽  
Powder Bed ◽  
Beam Laser ◽  
Laser Beam Melting ◽  
Axial Fatigue

Nowadays many materials such as steels, aluminium and titanium alloys can be realised by powder bed solutions melting subsequently powder layers by means of a laser or electron beam (Laser Beam Melting – LBM and Electron Beam Melting – EBM). The microstructure realised by layer-by-layer solidification having high cooling rate cannot be considered isotropic. Therefore, the mechanical properties could be influenced by the building direction. Regarding maraging steel, the study of the influence of the building direction and the heat treatment on the static and axial fatigue strength has been investigated in a previous contribution. A large scatter of the fatigue test results was found because of the presence of detrimental surface and subsurface defects. The aim of this contribution is to present additional axial fatigue test results of maraging steel characterized by different build orientation and providing an analysis of the defects observed at the crack initiation area of the fracture surface.

A New Improved Tirecord Fatigue Tester

1969 ◽  
Vol 42 (4) ◽  
pp. 1000-1008 ◽  
Author(s):  
M. J. Forster ◽  
I. B. Prettyman
Keyword(s):  
Test Specimen ◽  
Performance Characteristics ◽  
Fatigue Performance ◽  
Laboratory Evaluation ◽  
Dynamics Analysis ◽  
Simple Test ◽  
Reasonable Time ◽  
Service Testing ◽  
Tire Dynamics ◽  
And Performance

Abstract Based on the illustrations presented, it is suggested that the SCEF fatigue tester has given realistic results, consistent with general principles established in tire dynamics analysis and performance. It has done this with a simple test specimen, yet one which locates the test cord in an environment similar to that found in service. Testing results have been reproducible and obtained in a reasonable time. It is felt that it will make a unique and meaningful contribution to the laboratory evaluation of fatigue performance characteristics of a tirecord.

Fatigue Performance of Grade R4 and R5 Mooring Chains in Seawater

2014 ◽  
Author(s):  
Jonathan Fernández ◽  
Walther Storesund ◽  
Jesús Navas
Keyword(s):  
Fatigue Test ◽  
Fatigue Damage ◽  
Fatigue Tests ◽  
Design Methods ◽  
Full Scale ◽  
Fatigue Performance ◽  
Test Program ◽  
Gas Industry ◽  
Fatigue Design ◽  
Cumulative Fatigue Damage

With more than 50.000 tons in service to date, the Oil&Gas Industry has the need to understand the tension fatigue performance of grade R5 chains in straight tension, and corroborate the validity of the existing design methods. The chain fatigue design curves in API and DNV are based on fatigue tests obtained in the nineties and early two thousands. However the tests were performed on lower grades such as ORQ, R3 and R4, and small chains, 76 mm diameter being the largest studless chain tested. The industry has moved towards the use of large studless chains, especially in permanent units, where chain diameters above 150 mm are not unusual. This paper gathers information from a full scale fatigue test program on grade R4 and R5 studless chains, performed in seawater and with diameters between 70 mm and 171 mm. The chains being tested are actual production chains supplied for different drilling units and large permanently moored production floating units. The paper analyses the data and determines tension-tension fatigue curves based on API and DNV methods for computation of cumulative fatigue damage, regardless of other damaging mechanisms. Improved fatigue capacity is obtained with respect to the above recommended design methods.

scholarly journals Study on the dynamic fatigue performance of shot blasting machine’s blades based on modal analysis

2021 ◽  
Vol 1948 (1) ◽  
pp. 012214
Author(s):  
Tianyi Zhang ◽  
Shuai Wang ◽  
Yusuf Abdullahi Yousuf ◽  
Zhenfeng Jiang ◽  
Jitao Fang ◽  
...  
Keyword(s):  
Modal Analysis ◽  
Fatigue Performance ◽  
Shot Blasting ◽  
Dynamic Fatigue

scholarly journals Dominance distributions for fatigue performance of materials and its application in material selection

2020 ◽  
Author(s):  
Xin Bai ◽  
Peng Zhang ◽  
Enna Yang ◽  
Qiqiang Duan ◽  
Hao Bo ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Fatigue Life ◽  
Probability Distribution ◽  
Reliability Index ◽  
Material Selection ◽  
Fatigue Property ◽  
Fatigue Performance ◽  
New Method ◽  
Variable Amplitude ◽  
Casting Alloys

A new method for the comparison of fatigue performance among different materials is proposed by using Monte-Carlo technology. The uncertainty of material’s fatigue property and the diversity of service loads are respectively described as a reliability index and a probability distribution. Using fatigue life as the standard measure of fatigue performance, two kinds of diagrams are developed as the dominance distributions for fatigue performance of materials. After the implication in the material selection from two casting alloys, the results show that the new method can evaluate the fatigue performance among different materials no matter withsanding constant or variable amplitude loading, which is very easy to guide the judgment whether the material has better fatigue performance or not.

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