CFRP层合板火烧后拉伸行为及失效机理研究

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中图分类号：TB332 文献标志码：A

Abstract： To investigate the tensile behavior and failure mechanism of carbon fiber reinforced polymer （CFRP） composites after fire exposure，tensile tests were conducted on three diferent layups of CFRP laminates subjected to fire exposure.Thermal stability was monitored using an infrared thermal imager，followed by microstructural analysis via SEMto investigate the effects of burn temperature and fiber lay-upon the pyrolysis behavior of CFRP laminates.Finally，their tensile strength and failure mechanisms wereevaluated through load-displacement curves，stress-strain curves，and failure morphologies.The results show that CFRP laminates subjected to high-temperature exposure exhibit significant pyrolysis and mass lossand their damage mechanisms include matrix decomposition，fiber/matrix interface debonding，and interlaminar delamination. Compared to 400°C ，specimensexhibitatwofold increase in mass lossandmore severedamageat 600°C .Asimilar trend incurvesanda significant difference in strength are found in ±45∘ laminates， whose mechanical performance depends greatly on the resin propertiesand fiber/matrix adhesion.The ranking of tensile strength for specimens after fire exposure is as follows： 0∘ laminate， 0∘/90∘ laminate， and ±45∘ laminate.Furthermore，the 0∘ laminate experiences the smallest degradation rate.

Key words： CFRP; fiber layup; thermal damage; static tensile test; failure mechanisms

Citation format：LEI Z X， ZHANG H，PANR，etal. Experimental investigation on tensile behavior and failure mechanism of CFRPlaminatesafter fireexposure[J].JournalofEast China Jiaotong University，2025，42（5）： 104-112.

目前，由于需要更轻质高强及抗腐蚀的材料，大量航空航天零部件要求从传统的金属结构向碳纤维增强树脂复合材料（CFRP）转换[1-3]。（剩余10864字）