摘要
通过拉伸试验,研究了恶劣环境作用后纤维增强聚合物(FRP)片材的拉伸性能。试验参数包括恶劣环境类别和作用方式、FRP片材种类和层数。试验结果表明,常温环境下、冻融和干湿循环作用后,碳纤维增强聚合物(CFRP)片材和玻璃纤维增强聚合物(GFRP)片材的拉伸应力-应变关系近似为直线;常温环境下,CFRP片材和GFRP片材的拉伸强度和延伸率几乎不受片材层数的影响;冻融循环对GFRP片材的影响大于CFRP片材,冻融循环75次时,CFRP片材和GFRP片材的拉伸强度分别是未冻融的0.978倍和0.898倍,并且随着循环次数的增加,CFRP片材和GFRP片材拉伸强度逐渐下降;干湿循环作用对GFRP片材拉伸性能没有明显的影响。基于对有关文献及本文试验结果的分析,提出了恶劣环境下FRP片材拉伸强度的计算方法。
Through the tensile tests,the tensile properties of fiber reinforced polymer（FRP）sheet exposed to severe environment were studied.Test parameters included the category and working way of severe environment,the type and layer of FRP sheet.The experimental results show that the tensile stress-strain curves of carbon fiber reinforced polymer（CFRP）sheet and glass fiber reinforced polymer（GFRP）sheet are approximately straight line at ambient temperature and after the action of freeze-thaw cycles and dry-wet cycles,the tensile strength and elongation of CFRP sheet and GFRP sheet at ambient temperature are almost not affected by the number of sheet.The effect of freeze-thaw cycles on GFRP sheet is larger than that on CFRP sheet;the tensile strength of CFRP sheet and GFRP sheet after 75 cycles of freeze-thaw is 0.978 and 0.898 times as much as 0 cycle of freeze-thaw respectively,and with the increasing number of cycles,the tensile strengths of CFRP sheet and GFRP sheet are gradually decreased;wet and dry cycles have no obvious effect on GFRP sheet.Based on the analysis of test results in the literatures and this paper,the calculation method of tensile strength of FRP sheet exposed to severe environment has been presented.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2017年第7期1496-1504,共9页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(50579068)
关键词
CFRP片材
GFRP片材
冻融循环
干湿循环
拉伸强度
计算方法
carbon fiber reinforced polymer（CFRP）sheet
glass fiber reinforced polymer（GFRP）sheet
freeze-thaw cycles
wet and dry cycles
tensile strength
calculation method
