Mesh size objective fatigue damage propagation in laminated composites using the multiscale discrete damage theory

2021 ◽  
Author(s):  
Zimu Su ◽  
Caglar Oskay
Keyword(s):  
Fatigue Damage ◽  
Laminated Composites ◽  
Mesh Size ◽  
Damage Propagation ◽  
Damage Theory

Analysis of Fatigue Mechanical Behaviors of Welding Conformations in Orthotropic Steel Bridge Deck

2015 ◽  
Vol 1096 ◽  
pp. 562-566 ◽  
Author(s):  
Bo Yu ◽  
Tao Hong ◽  
Jian Zhang ◽  
Qing Yu Liang
Keyword(s):  
Fatigue Damage ◽  
Bridge Deck ◽  
Fatigue Tests ◽  
Steel Bridge ◽  
Test Results ◽  
Practical Application ◽  
Mechanical Behaviors ◽  
Homogeneous Test ◽  
Orthotropic Steel Bridge Deck ◽  
Damage Theory

Due to the superior structure style, orthotropic steel bridge deck has been getting more and more widely practical application. The static and fatigue tests of the orthotropic steel bridge deck models were carried out in this research paper, which presented the fatigue damage developing laws, compared the test results with homogeneous test results in existing documents, and according to the relative fatigue accumulative damage theory, the fatigue accumulative damage equations of the sectional specimen and the whole specimen are respectively studied.

A Reliability Based Fatigue Damage Theory for Safe Design

1983 ◽  
Vol 105 (2) ◽  
pp. 212-216 ◽  
Author(s):  
C. D. Nash
Keyword(s):  
Weibull Distribution ◽  
Fatigue Damage ◽  
Public Safety ◽  
Fatigue Testing ◽  
Distribution Functions ◽  
Left Hand ◽  
The Public ◽  
Damage Theory

A reasonably safe reliability approach to a fatigue damage theory can be based on the fact that, in most cases involving the public safety, the designer can accept only very low probabilities of failure by fatigue. Thus we must be almost exclusively concerned with the lower left-hand tails of the associated distribution functions. An approach to damage theory is presented based on this concept and its possible utility reviewed. The Weibull distribution is utilized with three parameters. Suggestions are made as to needed fatigue testing.

Fatigue damage propagation models for ductile fracture of ultrahigh toughness cementitious composites

2016 ◽  
Vol 26 (6) ◽  
pp. 919-932 ◽  
Author(s):  
Wen Liu ◽  
Shilang Xu ◽  
Peng Feng
Keyword(s):  
Ductile Fracture ◽  
Fatigue Damage ◽  
Propagation Model ◽  
Cementitious Composites ◽  
J Integral ◽  
Propagation Models ◽  
Flexural Fatigue ◽  
Damage Propagation ◽  
Propagation Law ◽  
Independent Variable

Ultrahigh toughness cementitious composites are a kind of high-performance cementitious material with a characteristic of ductile fracture. Based on the continuum damage mechanics theory and flexural fatigue damage model, two damage propagation models of ultrahigh toughness cementitious composites are built. One is a linear bilogarithmic model with J-integral range as its independent variable, while the other one is a linear model on a semilogarithmic scale with fatigue stress level as its independent variable. However, according to former research, the J-integral depends strongly on specimens’ geometry, so the first damage propagation model is deeply influenced by material dimension. As a result, the second damage propagation model is more convenient in application, shows the material fatigue property in comparison with the first model. In order to prove these two models and obtain the parameters, a three-point flexural fatigue experiment on single-edge-notched fracture specimens is carried out. The results shows that the two models fit better with the experimental results, rather than the crack propagation law of ultrahigh toughness cementitious composites.

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