湿热环境下复合材料孔板压缩性能的研究

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湿热环境下复合材料孔板压缩性能的研究
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作者单位:沈阳航空航天大学机电工程学院
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中图分类号:TB332
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Compressing Property of Composite Laminate WithHole in Hygrothermal Environment

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摘要:

采用压缩试验的方法,对含孔机织碳纤维环氧复合材料层板进行了湿热环境下的压缩试验,研究

了湿热环境对其压缩性能的影响。分析了复合材料孔板的吸湿特性、压缩强度、破坏模式及动态力学性能。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。湿热环境会降低由基体性能

主导的压缩强度,130℃下湿态试样的开孔压缩强度保持率约为 70%。含孔复合材料层合板的破坏模式均为

过孔破坏,破坏均发生在应力集中的区域,并且断裂都是沿着应力集中最大的方向扩展。侧面断口主要为剪切

失效,有分层和屈曲的特征。吸湿后复合材料的 DMA T g 为 125℃,比干态时下降了 16℃。

Abstract:

The influence of hygrothermal environment on compressive property of woven carbon fiber epoxy resin

composite was investigated via compress test under different hygrothermal environment. Moisture absorption, compres-

sive property, failure modes and dynamic mechanical property were analyzed. The results show that the moisture ab-

sorption of woven carbon fiber epoxy resin composite is not high, which is just about 0. 88%. The compressive strength

of the laminates, dominated by the matrix, are reduced by the hygrothermal conditions. The retention rate of compres-

sive strength are about 70% on the condition of 130℃ after moisture absorption. The failure modes of composite lami-

nate with hole were hole failure, the damage occurred in the area of stress concentration, and the fracture was extend

in the direction of the stress concentration of the largest. The side of fracture morphology was mainly shear failure,

and the characteristic of buckling and delaminating. The glass transition temperature(DMA T g ) of composite after

moisture absorption is 125℃, which is 16℃ lower than dry contitions.

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马少华.湿热环境下复合材料孔板压缩性能的研究[J].宇航材料工艺,2015,45(6).

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在线发布日期: 2016-11-28
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