Fatigue failure identification using deformation and energy rate for hole‐fissure contained granite under freeze–thaw and variable‐frequency–variable‐amplitude cyclic loads

2021 ◽  
Author(s):  
Yu Wang ◽  
Juzhou Li ◽  
Chun Zhu ◽  
Tianqiao Mao
Keyword(s):  
Fatigue Failure ◽  
Variable Frequency ◽  
Cyclic Loads ◽  
Variable Amplitude ◽  
Energy Rate ◽  
Freeze Thaw ◽  
Failure Identification

Investigation of diagrams for deformation of metals under static and cyclic loads in relation to their fatigue failure

1974 ◽  
Vol 6 (9) ◽  
pp. 1052-1056 ◽  
Author(s):  
V. T. Troshchenko ◽  
L. A. Khamaza
Keyword(s):  
Fatigue Failure ◽  
Cyclic Loads ◽  
Static And Cyclic Loads

On the use of a digital computer as a two-phase variable-amplitude variable-frequency oscillator

1990 ◽  
Vol 37 (6) ◽  
pp. 576-581 ◽  
Author(s):  
Z.O. Yonah ◽  
A.M. El-Serafi ◽  
A.E. Krause
Keyword(s):  
Digital Computer ◽  
Variable Frequency ◽  
Phase Variable ◽  
Two Phase ◽  
Variable Amplitude ◽  
Frequency Oscillator

Study on Double-Frequency Composed Vibrating Compaction Method Based on Resonance and Antifriction Principle

2011 ◽  
Vol 402 ◽  
pp. 742-746 ◽  
Author(s):  
Yun Shi Yao ◽  
Zhong Xu Feng ◽  
Yan Wei Li ◽  
Xin Shi
Keyword(s):  
Surface Layer ◽  
Traditional Method ◽  
Asphalt Mixture ◽  
Variable Frequency ◽  
Compaction Process ◽  
Variable Amplitude ◽  
Double Frequency ◽  
Large Amplitude Oscillation ◽  
Compaction Method ◽  
Better Than

For improving compaction process, a method of double-frequency composed vibrating compaction was proposed, which based on resonance and antifriction principle. The method was different from the traditional variable-frequency and variable-amplitude compaction method, which has one frequency and associated amplitude. Double-frequency composed vibrating compaction method has two different frequencies and associated amplitudes simultaneously, thus enhanced resonance and antifriction of asphalt mixture, and large amplitude oscillation was prone to deep transmission of impact energy. The results showed that double-frequency composed vibrating compaction machine got higher degree of compaction than that of traditional machine with same tonnage, 2.6% higher in surface layer and 3.1% higher at the position 15 cm far from surface. Double-frequency composed vibrating compaction method was better than traditional method in concerned with the compactness in layers, and had obviously advantage of deep compaction.

Fatigue failure identification by time series model

1984 ◽  
Vol 20 (5-6) ◽  
pp. 705-718
Author(s):  
Donald S. Ermer ◽  
Budy D. Notohardjono
Keyword(s):  
Time Series ◽  
Fatigue Failure ◽  
Time Series Model ◽  
Failure Identification

Three dimensional analysis of low cycle fatigue failure in engine part subjected to multi-axial variable amplitude thermo-mechanical load

2016 ◽  
Vol 62 ◽  
pp. 128-141 ◽  
Author(s):  
Seyed Mohammad Hossein Sharifi ◽  
Hamed Saeidi Googarchin ◽  
Farinaz Forouzesh
Keyword(s):  
Dimensional Analysis ◽  
Fatigue Failure ◽  
Mechanical Load ◽  
Low Cycle Fatigue ◽  
Three Dimensional ◽  
Cycle Fatigue ◽  
Variable Amplitude ◽  
Engine Part

scholarly journals Generalized miner's number and probability of fatigue failure of concrete subjected to variable cyclic loads.

1995 ◽  
pp. 259-268 ◽  
Author(s):  
Hiromichi Yoshikawa ◽  
Hidekazu Nakabayashi ◽  
Hiroshi Yamauchi
Keyword(s):  
Fatigue Failure ◽  
Cyclic Loads

scholarly journals Fatigue Characteristic of Designed T-Type Specimen under Two-Step Repeating Variable Amplitude Load with Low-Amplitude Load below the Fatigue Limit

2021 ◽  
Vol 9 (2) ◽  
pp. 107
Author(s):  
Jin Gan ◽  
Di Sun ◽  
Hui Deng ◽  
Zhou Wang ◽  
Xiaoli Wang ◽  
...  
Keyword(s):  
Stress Ratio ◽  
Type Specimen ◽  
Fatigue Tests ◽  
Cumulative Damage ◽  
Cyclic Loads ◽  
Constant Amplitude ◽  
Type Specimens ◽  
Variable Amplitude ◽  
Non Linear ◽  
Low Amplitude

In order to investigate the non-linear fatigue cumulative damage of joints in ocean structural parts, one type of low carbon steel Q345D was employed to prepare designed T-type specimens, and a series of fatigue experiments were carried out on the specimens under two-step repeating variable amplitude loading condition. The chosen high cyclic loads were larger than the constant amplitude fatigue limit (CAFL) and the chosen low cyclic loads were below the CAFL. Firstly, the S-N curve of designed T-type specimen was obtained via different constant amplitude fatigue tests. Then, a series of two-step repeating variable load were carried out on designed T-type specimens with the aim of calculating the cumulative damage of specimen under the variable fatigue load. The discussions about non-linear fatigue cumulative damage of designed T-type specimens and the interaction effect between the high and low amplitude loadings on the fatigue life were carried out, and some meaningful conclusions were obtained according to the series of fatigue tests. The results show that fatigue cumulative damage of designed T-type specimens calculated based on Miner’s rule ranges from 0.513 to 1.756. Under the same cycle ratio, the cumulative damage increases with the increase of high cyclic stress, and at the same stress ratio, the cumulative damage increases linearly with the increase of cycle ratio. Based on the non-linear damage evaluation method, it is found that the load interaction effect between high and low stress loads exhibits different damage or strengthening effects with the change of stress ratio and cycle ratio.

Fatigue Test and Research on Tubular Joints of Concrete-Filled Steel Tube

2011 ◽  
Vol 368-373 ◽  
pp. 373-376
Author(s):  
Yan Diao
Keyword(s):  
Finite Element ◽  
Stress Concentration ◽  
Fatigue Test ◽  
Fatigue Failure ◽  
Fatigue Property ◽  
Steel Tube ◽  
Concrete Filled Steel Tube ◽  
Variable Amplitude ◽  
Tubular Joints ◽  
Surface Length

For the further study on stress concentration and fatigue property of tubular joints of concrete-filled steel, we designed the fatigue test on tubular joints of concrete-filled steel.Associating with the calculation of finite element, we studied the stress concentration, cracking source of fatigue, and fatigue -related rules including cracking expansion. I did the equivalent calculating under variable amplitude loading. We proposed the criterion of fatigue failure when surface length of penetrated crack is about 3 times as the thickness of the wall. According to the experiment we verified that the tubular joints under the amplitude load this criterion is reasonable, secure and feasible.

Study of in-plane Fatigue Failure and Life Prediction of Weave Composites under Constant and Variable Amplitude Loading

2016 ◽  
Vol 24 (8) ◽  
pp. 597-608 ◽  
Author(s):  
Qinghui Ji ◽  
Ping Zhu ◽  
Jiahai Lu ◽  
Zhao Liu
Keyword(s):  
Fatigue Failure ◽  
Life Prediction ◽  
Variable Amplitude Loading ◽  
Variable Amplitude

Investigation on the effect of freeze-thaw on fracture mode classification in marble subjected to multi-level cyclic loads

2021 ◽  
Vol 111 ◽  
pp. 102847
Author(s):  
Y. Wang ◽  
B. Zhang ◽  
S.H. Gao ◽  
C.H. Li
Keyword(s):  
Fracture Mode ◽  
Cyclic Loads ◽  
Freeze Thaw ◽  
Multi Level
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