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材料工程  2016, Vol. 44 Issue (2): 81-87    DOI: 10.11868/j.issn.1001-4381.2016.02.013
  测试与表征 本期目录 | 过刊浏览 | 高级检索 |
湿热环境对碳纤维环氧树脂复合材料弯曲性能的影响
马少华1, 王勇刚1, 回丽1,2, 许良1
1. 沈阳航空航天大学 机电工程学院, 沈阳 110136;
2. 沈阳航空航天大学 航空制造工艺数字化国防 重点学科实验室, 沈阳 110136
Influence of Hygrothermal Environment on Flexural Property of Carbon Fiber Epoxy Composite
MA Shao-hua1, WANG Yong-gang1, HUI Li1,2, XU Liang1
1. School of Mechatronics Engineering, Shenyang Aerospace University, Shenyang 110136, China;
2. Key Laboratory of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process, Shenyang Aerospace University, Shenyang 110136, China
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摘要 采用不同温度下的三点弯曲测试方法,研究了湿热环境对机织碳纤维环氧复合材料吸湿前后弯曲性能的影响,分析了复合材料的吸湿量、断口形貌、动态力学性能及其加载曲线。结果表明:机织碳纤维环氧复合材料吸湿率较低,其饱和吸湿率仅为0.88%左右。湿热对复合材料弯曲强度的影响要大于对弯曲模量的影响。干态试样的断裂形式都为脆性断裂,湿态试样只有在高温下未发生断裂。吸湿后复合材料的玻璃化转变温度(DMA Tg)为125℃,比干态时下降了16℃。在弯曲变形的前期,载荷和位移曲线都成线性变化,干态试样在载荷达到峰值之前会出现小的波动。湿态试样的后期会有明显的弯折或塑变,而且随着温度的升高这种现象越明显。
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马少华
王勇刚
回丽
许良
关键词 机织碳纤维环氧复合材料湿热环境弯曲性能吸湿量断口形貌动态力学性能    
Abstract:The influence of hygrothermal environment on flexural property of woven carbon fiber epoxy resin composite was investigated via three point flexural test under different temperatures. Moisture absorption, fracture morphology, dynamic mechanical property and load curve were analyzed. The results show that the moisture absorption of woven carbon fiber epoxy resin composite is just about 0.88%. The influence of hygrothermal environment on flexural strength of composites is greater than flexural modulus. The fracture mode of dry samples is all brittle fracture;Wet samples are not fracture only at high temperature. The glass transition temperature(DMA Tg)of composite after moisture absorption is 125℃, which is 16℃ lower than that of dry. The load and displacement curves is linear at the early stages of the flexural deformation, the dry samples have a little fluctuation before reach the load peak. Wet samples have obvious buckling or plastic deformation, and the phenomenon more obvious with the increase of temperature.
Key wordswoven carbon fiber epoxy resin composite    hygrothermal environment    flexural property    moisture absorption    fracture morphology    dynamic mechanical property
收稿日期: 2015-05-28      出版日期: 2016-02-22
中图分类号:  TB332  
通讯作者: 回丽(1965-),女,博士,教授,主要从事复合材料和金属材料性能研究,联系地址:辽宁省沈阳市道义南大街37号沈阳航空航天大学航空制造工艺数字化国防重点学科实验室(110136),E-mail:syhuili@163.com     E-mail: syhuili@163.com
引用本文:   
马少华, 王勇刚, 回丽, 许良. 湿热环境对碳纤维环氧树脂复合材料弯曲性能的影响[J]. 材料工程, 2016, 44(2): 81-87.
MA Shao-hua, WANG Yong-gang, HUI Li, XU Liang. Influence of Hygrothermal Environment on Flexural Property of Carbon Fiber Epoxy Composite. Journal of Materials Engineering, 2016, 44(2): 81-87.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.02.013      或      http://jme.biam.ac.cn/CN/Y2016/V44/I2/81
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