李翀,鄂大辛,佘彩凤.5A03铝合金管轴向压缩失稳形式及影响因素分析[J].精密成形工程,2014,6(2):36-40,50.
LI Chong,E Da-xin,SHE Cai-feng.Analysis on Instability Forms of 5A03Aluminum Alloy Tube under Axial Compression and Its Influencing Factors[J].Journal of Netshape Forming Engineering,2014,6(2):36-40,50. |
| 5A03铝合金管轴向压缩失稳形式及影响因素分析 |
| Analysis on Instability Forms of 5A03Aluminum Alloy Tube under Axial Compression and Its Influencing Factors |
| 投稿时间：2013-12-30 修订日期：2014-03-01 |
| DOI：10.3969/j.issn.1674-6457.2014.02.007 |
| 中文关键词: 5A03管 轴向压缩 失稳 准静态实验 |
| 英文关键词: 5A03 tube axial compression instability quasi-static test |
| 基金项目:国家自然科学基金(51175044) |
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| 中文摘要: |
| 目的 研究管材在承受轴向压缩时的力学行为、失稳形式及其影响因素。 方法 在航空航天用 5A03铝合金管准静态轴向拉伸和压缩实验的基础上,进行了管压缩过程的有限元分析。 结果 5A03圆管拉伸与压缩力学性能有较大差异,具有拉、压双模量倾向,拉伸屈服强度略低于压缩屈服强度,抗拉强度略低于抗压强度,且拉伸与压缩均呈现锯齿波屈服特性;高径比影响管压缩失稳形式,小于 1 时管试样形成单鼓,大于 1 时将出现双鼓,且鼓凸在管材端面摩擦较大一端优先出现。 结论 管材失稳鼓凸后表现为一种具有一定规律性的非轴对称屈曲压溃。 |
| 英文摘要: |
| Objective To investigate the mechanical behavior, the buckling form and influencing factors of the pipes under axially compressive load. Methods Based on a series of experiments on quasi-static tensile and compression test of 5A03 aluminum alloy tube, finite element analysis of axial compression for this tube was carried out. Results The results showed that there were differences between tensile and compressive mechanical properties of 5A03 tube, such as tendency of tensile-compressive bi-modulous, the tensile yield strength was slightly higher than the compressive yield strength, the tensile strength was slightly lower than the compressive strength, and both the tensile and compression tests exhibited certain yield characteristics of saw tooth wave. Height-diameter ratio affected the form of compression instability: when the ratio was lower than one, the test specimen developed into a figure of single bulge, while it turned into a figure of double bulge as the ratio became larger than one. The bulge preferred to occur at the end where the friction was larger. Conclusion The tube exhibited a certain regular non-axisymmetric buckling crushing after compression instability. |
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