| 闫畅,宋绪丁,荆传贺,封硕.工业闭孔泡沫铝压缩力学性能及变形机理[J].材料导报,2017,31(18):92-96, 101 |
| 工业闭孔泡沫铝压缩力学性能及变形机理 |
| Mechanical Properties and Deformation Mechanism of Industrial Aluminum Foams |
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| DOI：10.11896/j.issn.1005-023X.2017.018.019 |
| 中文关键词: 闭孔泡沫铝 力学性能 变形机理 压缩实验 |
| 英文关键词: closed-cell aluminum foam, mechanical property, deformation mechanism, compression test |
| 基金项目:中央高校基金(310825175007；310825163407；310825161001)；陕西省科技统筹创新工程重点实验室项目(2014SZS11-P04) |
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| 中文摘要: |
| 泡沫铝是一种新型的结构和功能材料,因特殊的能量吸收特性而在工程领域具有很好的应用前景。为了研究基体材料对泡沫铝力学性能和变形失效机理的影响,同时为工业泡沫铝材料提供更具参考价值的性能指标,对工业上最常见的两种不同基体(纯铝基体和7050铝合金基体)的泡沫铝材料进行了准静态压缩力学性能的试验,并对其变形机理进行了分析。试验结果表明,相同规格的7050基体泡沫铝的压缩力学性能高于纯铝基体泡沫铝,能量吸收能力也远大于纯铝基体泡沫铝。纯铝基体泡沫铝在压缩载荷下呈现逐层坍塌、连续性破坏的模式,试件在完全压实后呈碎渣;7050基体泡沫铝表现出逐层坍塌、间断式破坏的模式,试件在完全压实后呈完整的块状。7050基体泡沫铝的泡孔结构比纯铝基体泡沫铝均匀,力学性能更加稳定。 |
| 英文摘要: |
| Aluminum foams are a new class of structural and functional materials. It has a bright prospect in engineering field. In order to study the effects of matrix materials on the mechanical properties and deformation mechanism of aluminum foam and endow industrial aluminum foam with a more useful and reliable performance index, two kinds of industrial foams, Al-matrix and 7050 Al-alloy-matrix foams, were studied. The results showed that the compressive mechanical properties of 7050 Al-alloy-matrix foam was much higher than that of Al-matrix foam, so was its energy absorption ability. The deformation mechanism of Al-matrix foam was that the cells collapsed layer by layer during deformation, continuously. The outside materials of Al-matrix foam peeled off during the compression remarkably and compressed to be crumbs finally. The deformation mechanism of 7050-matrix foam was that the cells collapsed layer by layer during the deformation, discontinuously. The specimens were still whole bulks after compression finally. The cell structure of 7050-matrix foam was more uniform than that of Al-matrix foam in the present study, therefore its mechanical stability was better than Al-matrix foam. |
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