含孔纤维增强铝合金层板拉伸损伤失效行为的声发射分析
Acoustic emission study on tensile damage and failure behavior of fibrereinforced aluminum alloy laminates with hole
查看参考文献14篇
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文摘
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采用声发射技术(AE)和数字图像相关技术(DIC)相结合的方法对含孔GLARE层板的静载轴向拉伸损伤过程进行实时监测,研究开孔尺寸对其力学行为及失效机理的影响。基于k均值(k-means)方法确定不同损伤模式的峰值频率(PF)范围,并结合幅值(PA)、能量(E)以及累计撞击数等AE特征参数分析含孔GLARE层板的拉伸失效机理。结果表明:GLARE层板在整个拉伸过程中主要存在四种损伤模式,即金属层板损伤、基体开裂、纤维剥离与分层损伤和纤维断裂;四种损伤模式的发生在时间上具有时序性;开孔尺寸对GLARE的承载能力具有显著影响;随着孔径的增大,试样在失效阶段末期由突然断裂变为延性断裂。 |
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其他语种文摘
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Real-time monitoring of the axial tensile damage process of GLARE laminates with hole was carried out by combining acoustic emission(AE) technology and digital image correlation(DIC) technology. The effect of hole size on the mechanical behavior and failure mechanism was further analyzed. The peak frequency(PF) range of different damage modes was determined based on the k-means method, and the characteristics of AE parameters such as amplitude(PA), energy(E), and cumulative impact number were used to clarify the tensile failure mechanism of GLARE laminates with hole. The results show that there were mainly four damage modes during the entire tensile process of GLARE laminates, namely metal layer damage, matrix cracking, fiber debonding and interface delamination, and fiber fracture. The occurrence of the four damage modes is sequential in time. The size of the hole had a significant impact on the bearing capacity of GLARE, and as the aperture increased, the specimen changed from sudden fracture to ductile fracture at the end of the failure stage. |
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来源
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航空材料学报
,2023,43(5):97-105 【核心库】
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DOI
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10.11868/j.issn.1005-5053.2023.000027
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关键词
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GLARE层板
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AE技术
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DIC方法
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聚类分析
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失效机理
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地址
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江苏理工学院材料工程学院, 江苏, 常州, 213001
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1005-5053 |
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学科
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一般工业技术 |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:7575088
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