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GFRP 层合板挖补修理参数对其拉伸性能的影响

路鹏程,王宏洋,李娜,苏景新   

  1. (taptap下载安装安卓天津市民用航空器适航与维修重点实验室,天津300300)
  • 收稿日期:2016-07-06 修回日期:2016-09-06 出版日期:2016-10-19 发布日期:2016-12-06
  • 作者简介:路鹏程(1987—),男,陕西榆林人,助理实验师,硕士,研究方向为树脂基复合材料.
  • 基金资助:

    国家自然科学基金项目(61471364);中国民用航空局科技基金项目(MHRD20160106)

Influence of GFRP laminate‘s scarf repair parameters on its tensile properties

LU Pengcheng, WANG Hongyang, LI Na, Su Jingxin   

  1. (Civil Aircraft Airworthiness and Maintenance Key Lab of Tianjin, CAUC, Tianjin 300300, China)
  • Received:2016-07-06 Revised:2016-09-06 Online:2016-10-19 Published:2016-12-06

摘要:

针对民用航空器用玻璃纤维增强环氧树脂基复合材料(GFRP,glass fiber reinforce polymer)层合板,典型损伤通常采用挖补方法进行修理,本研究对挖补修理的关键参数——台阶比率、表面粗糙度、固化温度等因素对挖补修理结构拉伸性能的影响规律进行了系统研究。实验结果表明袁挖补修理明显改变了GFRP 层板结构的力学特性。在6 种台阶比率(1 :10~1 :60)中,随着台阶比率的增加,拉伸强度呈现先增加后减小的趋势,在台阶比率为1 :40 时,拉伸强度最高,拉伸强度保持率约为51%。在台阶比率为1 :40 情况下,修理试样拉伸强度随着粘接界面的粗糙度增加而增加;同时,随着修理固化温度的增加,拉伸强度也出现先增加后降低的趋势袁250 ℉时修理试样拉伸强度最高。

关键词: 复合材料, 挖补法修理, 力学性能, 固化温度

Abstract:

Scarf repair approach is usually adopted to deal with a typical damage in GFRP (glass fiber reinforce polymer)laminate on a civil aviation aircraft. A systematic research is conducted on the influence of scarf repair key parameters such as step ratio, surface roughness and curing temperature upon its tensile properties. Experimental results reveal that scarf repair approach has a significant changing effect on the mechanical properties of GFRP laminated plate structure. Along with the increase of step ratio (from 1:10 to 1:60), the tensile strength appears a trend of decrease following an initial increase. When step ratio is 1:40, the tensile strength reaches its peak, with a tensile strength retention rate of 51%. In the case of 1:40 step ratio, the tensile strength of repair specimen increases with an intensity of roughness on the surface of junction. Meanwhile, with the increase of curing temperature, tensile strength also presents a trend of increase after a decrease and the tensile strength of repair specimen reaches its maximum when the temperature is 250 ℉.

Key words: composite, scarf repair, mechanical property, curing temperature

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