scholarly journals Influence of Water on Delamination Growth Behavior under Tensile and Fatigue Loading in Aramid/Epoxy Composites.

1993 ◽  
Vol 42 (475) ◽  
pp. 391-397 ◽  
Author(s):  
Kenjiro KOMAI ◽  
Kohji MINOSHIMA ◽  
Yasushi SADA
Keyword(s):  
Fatigue Loading ◽  
Growth Behavior ◽  
Epoxy Composites ◽  
Delamination Growth ◽  
Influence Of Water

Fatigue Behavior of Impacted Plain-Weave Glass/Epoxy Composites under Tensile Fatigue Loading

2005 ◽  
Vol 297-300 ◽  
pp. 1291-1296 ◽  
Author(s):  
Ki Weon Kang ◽  
Jung Kyu Kim ◽  
Heung Seob Kim
Keyword(s):  
Fatigue Life ◽  
Impact Damage ◽  
Fatigue Behavior ◽  
Fatigue Loading ◽  
Epoxy Composites ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Damage Behavior ◽  
Plain Weave ◽  
The Impact

The goals of this paper are to identify the impact damage behavior of plain-weave E-glass/epoxy composites and predict the fatigue life of the composites with impact-induced damage under constant amplitude loading. To identify these behaviors, the low velocity impact and fatigue after impact tests are performed for glass/epoxy composites having two types of fiber orientations. The impact damage behavior is dependent on the fiber orientation of the composites. The fatigue life of the impacted composites can be identified through the prediction model, which was proposed on the carbon/epoxy laminates by authors regardless of fiber orientations.

Void Growth Simulation of a Steam Turbine Casing Material Under Creep and Creep-Fatigue Loading

2007 ◽  
Author(s):  
Takashi Ogata
Keyword(s):  
Growth Rate ◽  
Cyclic Loading ◽  
Void Growth ◽  
Fatigue Loading ◽  
Fatigue Tests ◽  
Growth Behavior ◽  
Growth Simulation ◽  
Creep Fatigue ◽  
Turbine Casing ◽  
Damaged Materials

High temperature components in thermal power plants are subjected to creep and creep-fatigue loading where creep voids initiate and grow on grain boundaries. Development of a quantitative evaluation method of the void growth is important for reliable maintenance of these components. In this study, creep and creep-fatigue tests were carried out at 600 °C on a 1Cr-Mo-V casting steel. Creep damaged materials were produced by interrupting the creep tests and microstructure of the damaged materials were observed carefully by a scanning microscope. The creep-fatigue tests were also conducted in a scanning electron microscope, and continuous observation of void growth behavior during the tests was made. From the observations, spherical shape voids initiate and grow up to their length of 2μm on grain boundaries at initial stage of damage, and then these voids change their shape to crack-like to grow until their length reaches around 10μm under both the creep and the creep-fatigue conditions. Under the same stress level, the void growth rate in the creep-fatigue condition was faster than that in the creep condition indicating acceleration of void growth rate by cyclic loading. Previously proposed void growth simulation model, in which the void growth was controlled by diffusion and power law creep, was modified to express acceleration of the void growth by the cyclic loading. Void growth behavior within a certain area under both the creep and the creep-fatigue condition were simulated by the modified program. Predicted void growth behaviors agreed with observed ones. The void growth behavior of an actual turbine casing was also simulated and void growth behavior was discussed based on the result.

Delamination growth behavior of a woven E-glass/bismaleimide composite in seawater environment

2016 ◽  
Vol 106 ◽  
pp. 332-343 ◽  
Author(s):  
Yian Zhao ◽  
Wei Liu ◽  
Leong Keey Seah ◽  
Gin Boay Chai
Keyword(s):  
Growth Behavior ◽  
Delamination Growth ◽  
Seawater Environment
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