New Method for the Statistical Evaluation of Constant Stress Amplitude Fatigue-Test Results

2009 ◽  
pp. 3-3-26 ◽  
Author(s):  
FA Bastenaire
Keyword(s):  
Fatigue Test ◽  
Statistical Evaluation ◽  
Stress Amplitude ◽  
Constant Stress ◽  
New Method ◽  
Test Results

Experimental evaluation of fatigue damage in two-stage loading tests based on the energy dissipation

2015 ◽  
Vol 229 (7) ◽  
pp. 1280-1291 ◽  
Author(s):  
Giovanni Meneghetti ◽  
Mauro Ricotta ◽  
Bruno Atzori
Keyword(s):  
Energy Dissipation ◽  
Fatigue Test ◽  
Fatigue Damage ◽  
Stress Amplitude ◽  
Mechanical Energy ◽  
Heat Energy ◽  
Dissipated Energy ◽  
External Loading ◽  
Test Results ◽  
Stored Energy

Heat energy dissipation is a manifestation of damage accumulation in fatigue-loaded components. Once recognized that some mechanical energy has to be expended to fatigue a material, energy partition into heat and stored energy is thought of as a material property in the present testing conditions. However, most of the mechanical input energy is dissipated as heat; therefore, the stored energy is difficult to estimate as difference between the expended and the dissipated energy. In this article heat energy is assumed as an index of fatigue damage. Since it reflects the material response to external loading, heat energy was seen to reduce the scatter of constant amplitude fatigue test results with respect to the use of the stress amplitude. Moreover, two-level fatigue test results could be interpreted with a higher level of accuracy when Miner’s rule was applied in terms of energy rather than stress amplitude.

scholarly journals Analysis of the Correlation between the Static and Fatigue Test Results of the Interlayer Bondings of Asphalt Layers

2016 ◽  
Vol 62 (1) ◽  
pp. 83-98 ◽  
Author(s):  
A. Szydło ◽  
K. Malicki
Keyword(s):  
Fatigue Life ◽  
Fatigue Test ◽  
Asphalt Mixture ◽  
Fatigue Tests ◽  
Test Results ◽  
Static Tests ◽  
Bonding State ◽  
Road Pavement ◽  
The Future ◽  
Pavement Structure

Abstract The bonding state of the asphalt layers in a road pavement structure significantly affects its fatigue life. These bondings, therefore, require detailed tests and optimization. In this paper, the analyses of the correlation between the results of laboratory static tests and the results of fatigue tests of asphalt mixture interlayer bondings were performed. The existence of the relationships between selected parameters was confirmed. In the future, the results of these analyses may allow for assessment of interlayer bondings’ fatigue life based on the results of quick and relatively easy static tests.

New Method for Measuring Liquid Level in WFGD System

2011 ◽  
Vol 418-420 ◽  
pp. 1804-1807
Author(s):  
Li Li ◽  
Zheng Hui Tan ◽  
Jia Wen Liu
Keyword(s):  
Flue Gas ◽  
Traditional Method ◽  
Large Deviation ◽  
Flue Gas Desulfurization ◽  
New Method ◽  
Liquid Level ◽  
Test Results ◽  
Economic Operation ◽  
Local Test ◽  
Operation Cost

Traditional method for measuring liquid level of absorption tower in wet flue gas desulfurization (WFGD) system is introduced in this paper, and it's found that measuring accuracy of the method exists in large deviation. A new method is proposed to measure liquid level of absorption tower for this situation. The local test results show that not only measurement result of new method is more close to the actual liquid level than traditional method, but also using new method can save operation cost and ensure the safety, stability, and economic operation of WFGD system.

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.

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