| 引用本文: | 王春齐,江大志,曾竟成,等.温度和压力对玻璃纤维增强环氧复合材料吸湿特性的影响.[J].国防科技大学学报,2010,32(2):40-45.[点击复制] |
| WANG Chunqi,JIANG Dazhi,ZENG Jingcheng,et al.Effects of Temperature and Pressure on Water Absorption of Glass Fiber Reinforced Epoxy Resin Composites[J].Journal of National University of Defense Technology,2010,32(2):40-45[点击复制] |
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| 温度和压力对玻璃纤维增强环氧复合材料吸湿特性的影响 |
| 王春齐, 江大志, 曾竟成, 袁志庆, 肖加余 |
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(国防科技大学 航天与材料工程学院，湖南 长沙 410073)
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| 摘要: |
| 采用称量法研究了温度、压力对浸泡在水中的GF/E-51试件吸湿性的影响；通过短梁剪切实验研究了温度、压力和浸泡时间对GF/E-51剪切强度的影响，使用体视显微镜观察了浸泡60d后GF/E-51的截面形貌。结果表明：温度对试件的吸湿影响较大，与30℃时相比，50℃时的平衡吸湿量增了145.0%，扩散系数增加了47.6%，50%吸湿量以前的平均吸湿速率增加了3倍，温度升高，加速了GF/E-51试件吸湿由Fick扩散到非Fick扩散的转变；压力对复合材料吸湿及吸湿试样的剪切强度有明显的影响：压力升高，抑制了树脂基体的溶胀，延缓了GF/E-51试件吸湿由Fick扩散到非Fick扩散的转变，减轻了溶胀对剪切强度影响，浸泡60d后，剪切强度保留率保持不变，但5atm/30℃水中试件剪切强度保留率比1atm/30℃条件下高3.97%、比1atm/50℃条件下高5.17%。 |
| 关键词: 吸湿 压力 温度 玻璃纤维增强环氧树脂复合材料 |
| DOI： |
| 投稿日期：2009-11-24 |
| 基金项目:国家部委基金资助项目(2009k132) |
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| Effects of Temperature and Pressure on Water Absorption of Glass Fiber Reinforced Epoxy Resin Composites |
| WANG Chunqi, JIANG Dazhi, ZENG Jingcheng, YUAN Zhiqing, XIAO jiayu |
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(College of Aerospace and Materials Engineering, National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| Moisture measurement, shear strength testing and morphology observation of glass fiber reinforced epoxy resin composites (GF/E-51) specimen immersed in water were carried out in this paper. Experimental results show that the maximum moisture content of the specimen in water of 50℃ was increased by 145% than that in water of 30℃, while the diffusivity coefficient increased by 47.6% and the average water absorbing rate increased by 300%. Increasing temperature accelerated the transformation of water absorbing process from the Fick law based to the No-Fick law based. Increasing pressure, however, decreased the process as the pressure restrains the swelling of the GF/E51 in water. Sixty days after the specimen was immersed in water, the shear strength of all specimen will reach the minimum values while the shear strength of the specimen in water of 5atm and 30℃ is 3.97% higher than that of the specimen at 1atm and 30℃， and 5.17% higher than that of the specimen at 1atm and 50℃, respectively. |
| Keywords: water absorption pressure temperature glass fiber reinforced epoxy resin composites |
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