Experimental investigation and design method of the flexural buckling resistance of high-strength aluminum alloy H-columns

Experimental investigation and design method of the flexural buckling resistance of high-strength aluminum alloy H-columns
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高强铝合金H型柱抗弯屈曲试验研究及设计方法

DOI:
10.1016/j.istruc.2021.11.013
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发表时间:
2021-11
期刊:
影响因子:
4.1
通讯作者:
欧阳元文
欧阳元文
中科院分区:
工程技术3区
文献类型:
--
作者:
袁霖;张其林;欧阳元文

文献摘要

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如果所需的横截面大于通过挤压获得的横截面,则可以使用高强度铝合金构件。现行铝结构设计规范的适用范围仅限于普通强度材料,并探讨是否可以利用现有的屈曲曲线来设计高强度构件。十四根由 7075-T6 制成的 H 形截面柱在轴向压缩下进行了测试。对不同材料特性和缺陷对普通和高强度柱的弯曲屈曲行为的影响进行了数值分析。欧洲、中国和美国规范中的柱曲线可以安全地预测此类柱的抗弯屈曲阻力,平均低估率分别为13%、12%和8%。收集并分析了文献中对屈服应力在 388 MPa 至 557 MPa 之间的铝合金挤压型材进行的 81 个柱屈曲试验。最后,提出了一种新的弯曲屈曲曲线来估计高强度挤压构件的弯曲屈曲阻力。
High strength aluminum alloy members can be used if the required cross-sections are larger than those obtainable by extrusion. The application range of the current design codes for aluminum structures is limited for normal-strength material and whether high-strength members can be designed with the existed buckling curves is examined. Fourteen H-section columns made from 7075-T6 were tested under axial compression. The effects of the different material properties and imperfections on the flexural buckling behavior of normal- and highstrength columns were analyzed numerically. The column curves in European, Chinese and American specifications can predict flexural buckling resistance of such columns safely with an average underestimation of 13%, 12% and 8%, respectively. Eighty-one column buckling tests available in the literature performed on extruded sections made of aluminum alloy with the yield stress between 388 MPa and 557 MPa were collected and analyzed. Finally, a new flexural buckling curve was suggested for the estimation of flexural-buckling resistance of high-strength extruded members.
DOI: 10.2514/8.11173
发表时间: 1944-10
期刊: Journal of the Aeronautical Sciences
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