| 引用本文: | 杨孚标，肖加余，江大志，曾竟成.复合材料单面修补铝合金裂纹板的疲劳破坏特性[J].中国表面工程,2006,(7):210~214 |
| YANG Fu-biao, XIAO Jia-yu, JIANG Da-zhi, ZENG Jing-cheng.Fatigue Failure Properties of Pre-cracked Aluminum Alloy Plates One-Side-Bonded With Composite Patches[J].China Surface Engineering,2006,(7):210~214 |
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| 摘要: |
| 利用热压成型工艺、采用预固化的单向碳纤维/环氧复合材料补片对铝合金裂纹板进行了修补，测试了裂纹板胶接修补前后的破坏强度、疲劳寿命及裂纹扩展情况，观察了破坏后的断口形貌，分析了复合材料补片的止裂机理。结果表明，经过单向碳纤维/环氧复合材料补片胶接修补后，其破坏强度和疲劳寿命均有显著的提高，破坏强度提高了34.28%，恢复到完好板的85.83%，疲劳寿命提高2.06倍；裂纹板的临界裂纹长度从17.86 mm增加到28.64 mm，从而延长了裂纹缓慢扩展阶段，延缓了裂纹快速扩展；其断口形貌方式发生生了明显的变化。 |
| 关键词: 复合材料补片 疲劳寿命 破坏强度 |
| DOI： |
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| 基金项目:武器装备预研基金资助项目(编号略) |
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| Fatigue Failure Properties of Pre-cracked Aluminum Alloy Plates One-Side-Bonded With Composite Patches |
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YANG Fu-biao, XIAO Jia-yu, JIANG Da-zhi, ZENG Jing-cheng
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College of Aerospace and Material Engineering, National University of Defense Technology, Changsha, 410073
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| Abstract: |
| Fatigue cracked aluminum alloy plates were adhesively bonded with unidirectional carbon/epoxy composite patches by hot-press technology. The effectiveness of the repair scheme, including the tensile strength, the fatigue life and the crack progress during fatigue was investigated experimentally. The fractured faces of the plates were observed and the mechanism of the crack arrest of composite patch was discussed. It is showed that both the tensile strength and the fatigue life of the cracked plates increase significantly after bonded repair. The tensile strength of the bonded plates, which is 85.83% of the plates without flaw, is 34.28% higher than that of the cracked plates. The fatigue life of the bonded plates is 2.06 times relative to that of the cracked one. The critical crack length of plate increases from 17.86mm to 28.64mm before and after adhesively bonded repair with composite patch. |
| Key words: composite patch fatigue life tensile strength |
