Journal
JOURNAL OF POLYMER ENGINEERING
Volume 40, Issue 4, Pages 291-299Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1515/polyeng-2019-0339
Keywords
carbon fiber reinforced plastics (CFRPs); cryogenic temperature; fracture toughness; interface/interphase
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Funding
- National Natural Science Foundation of China [U1837203, 51872065]
- National Key Research and Development Program of China [2018YFA0702802]
- Research and Development Project of Harbin [2014RFQXJ028]
- Fundamental Research Funds for the Central Universities
- National Key Laboratory of Science and Technology on Advanced Composite in Special Environments [KL. PYJH. 2017. 003]
- Shenzhen Science and Technology Program
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This study focuses on the influence of cryogenic temperature on the interface of carbon fiber reinforced plastics (CFRPs). Results of interfacial shear strength (IFSS) and mode II interlaminar fracture toughness (G(HC)) at -196 degrees C increased by 15.3% and 27.6% compared to the condition at room temperature (RT). By measuring the IFSS at -196 degrees C, a new experimental method was designed based on microbond test. The layer shear fracture morphologies of CFRP were observed by atomic force microscopy and scanning electron microscopy, respectively. In order to study the interlaminar fracture mechanism, the interface and resin fracture hybrid model was built, and the shear-lag theory of interfacial toughness was adopted to analyze the energy release rate (G(dc)) of microbond. The results showed that the G(dc) value was increased by 11.5% from RT to -196 degrees C temperature. A higher G(HC) of CFRP was dominated by the higher IFSS and resin energy absorption at -196 degrees C.
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