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摘要
制备了复合材料泡沫夹层结构面板缺陷试样,并采用贴补法对缺陷试样进行了修补。通过采用DG-3胶将预先固化好的修补贴片与缺陷区域进行胶接,并采用热补仪将贴补修补后的区域进行加热固化,对贴补修补完成后的试样进行了无损检测、力学性能测试及微观结构分析。结果表明,采用贴补修补后,缺陷直径分别为20mm、30mm试样的拉伸断裂强度分别为0.644MPa、0.641MPa,拉伸断裂强度恢复率分别为98.6%、98.1%;弯曲强度分别达到2.186MPa、2.017MPa,弯曲强度恢复率分别为125.0%、114.9%。采用贴补修补法进行修补后,力学性能得到很好的恢复,胶接区域的胶粘剂、修补件与修补贴片间胶接情况良好。
Abstract
The panel flaw samples of composite foam sandwich were prepared,and the flaw samples were repaired by means of adding repair.The cured repair patch and flaw sample were glued by the DG-3 adhesive which were heated to curing by the hot bonder.Mechanical property,nondestructive testing and microstructure analysis of the repaired samples were carried out.The results showed that the tensile fracture strength of samples with defect diameters of 20mm and 30mm was 0.644MPa and 0.641MPa,and the recovery rate of tensile fracture strength was 98.6% and 98.1% respectively.The bending strength reached 2.186MPa and 2.017MPa,and the recovery rate of bending strength was 125.0% and 114.9%.The mechanical properties recovered well after the repair and the DG-3 adhesive of repair area achieved good adhesive condition.
关键词
复合材料
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泡沫夹层结构
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贴补修补
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强度恢复率
Key words
composite
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foam sandwich structure
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adding repair
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recovery rate of strength
复合材料泡沫夹层结构面板损伤缺陷贴补修补工艺研究[J].
化工新型材料, 2019, 47(11): 256-259 DOI:
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