期刊
INTERNATIONAL JOURNAL OF FATIGUE
卷 142, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2020.105913
关键词
3D woven composites; Tension-tension fatigue; Damage evolution; Synchrotron radiation computed tomography (SRCT); Fiber yarn undulation
资金
- National Natural Science Foundation of China [11972134, 11772105]
- Aeronautical Science Foundation of China [2017ZF77008]
- Natural Science Foundation of Heilongjiang Province [ZD2019A001]
A method combining mechanical testing, infrared thermography (IRT) and synchrotron radiation computed tomography (SRCT) is proposed for studying the damage evolution of 3D woven carbon/epoxy composites under tension-tension (T-T) fatigue loading. Fatigue tests and detection revealed the initiation, distribution, and development of cracks with increasing fatigue cycles, as well as discussed the effects of fiber yarn undulation and twist during the manufacturing process.
A method combining mechanical testing, infrared thermography (IRT) and synchrotron radiation computed tomography (SRCT) is proposed for the damage evolution of 3D woven carbon/epoxy composites under tension-tension (T-T) fatigue loading. To study the relationship between the damage evolution and the stiffness degradation, fatigue tests of six specimens are carried out to different stages before detection by SRCT and optical microscope. The detected results have revealed how cracks initiate, distribute and develop with increasing fatigue cycles. Particularly, the effects of fiber yarn undulation and twist caused during the manufacturing process are discussed.
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