单侧面板裂纹损伤对钛合金蜂窝夹层结构弯曲性能影响

doi:10.13700/j.bh.1001-5965.2019.0587

北京航空航天大学学报 ›› 2020, Vol. 46 ›› Issue (11): 2018-2025.doi: 10.13700/j.bh.1001-5965.2019.0587

单侧面板裂纹损伤对钛合金蜂窝夹层结构弯曲性能影响

岳喜山^1,2, 闫群³, 赵伟⁴, 谢宗蕻⁴

1. 西北工业大学航天学院, 西安 710072;
2. 中国航空制造技术研究院航空焊接与连接技术航空科技重点实验室, 北京 100024;
3. 沈阳飞机设计研究所结构部, 沈阳 110035;
4. 中山大学航空航天学院, 广州 510275

收稿日期:2019-11-14 发布日期:2020-12-01
通讯作者: 赵伟 E-mail:weida1985@126.com
作者简介:岳喜山,男,博士研究生。主要研究方向:钛合金壁板制造;赵伟,男,博士。主要研究方向:复合材料结构力学;谢宗蕻,男,博士,教授,博士生导师。主要研究方向:飞行器设计、结构力学与复合材料领域的工程和科学问题。

Influence of one side facesheet crack damage on flexural properties of titanium honeycomb sandwich structures

YUE Xishan^1,2, YAN Qun³, ZHAO Wei⁴, XIE Zonghong⁴

1. School of Astronautics, Northwestern Polytechnical University, Xi'an 710072, China;
2. Aeronautical Key Laboratory for Welding and Joining Technologies, AVIC Manufacturing Technology Institute, Beijing 100024, China;
3. Structure Department, Shenyang Aircraft Design and Research Institute, Shenyang 110035, China;
4. School of Aeronautics and Astronautics, Sun Yat-Sen University, Guangzhou 510275, China

Received:2019-11-14 Published:2020-12-01

摘要/Abstract

摘要： 钛合金蜂窝夹层结构在制备或使用过程中可能会产生面板裂纹损伤。采用试验和有限元结合的方法研究了单侧面板裂纹损伤对钛合金蜂窝夹层结构弯曲性能的影响。结果显示：单侧面板裂纹损伤会明显降低钛合金蜂窝夹层结构面板弯曲强度，弯曲强度近似随裂纹长度的增加而线性降低；有限元模型能够准确预测结构的破坏模式和破坏强度，预测得到的面板弯曲强度与试验结果最大偏差仅为6%。采用的有限元方法可用于含面板裂纹损伤的钛合金蜂窝壁板结构弯曲性能的工程预估。

关键词: 钛合金蜂窝夹层结构, 面板裂纹, 三点弯曲试验, 弯曲强度, 有限元

Abstract: During the manufacturing process and service period, the crack damage may occur in the facesheet of titanium honeycomb sandwich structure. The influence of one side facesheet crack damage on flexural properties of titanium honeycomb sandwich structures was studied experimentally and numerically. The research results show that the flexural strength of titanium honeycomb sandwich structure with one side facesheet crack damage is obviously lower than that of the structure without crack damage, and the flexural strength decreases linearly with the increase of the crack length; the finite element models can accurately predict the failure mode and fracture strength of the structures, and the maximum deviation between the predicted results and the test result is only 6%. The finite element analysis method can be used to predict the flexural strength of titanium honeycomb sandwich structure with facesheet crack damage in the engineering estimate.

Key words: titanium honeycomb sandwich structure, facesheet crack, three-point bending test, flexural strength, finite element

中图分类号:

V414.6

岳喜山, 闫群, 赵伟, 谢宗蕻. 单侧面板裂纹损伤对钛合金蜂窝夹层结构弯曲性能影响[J]. 北京航空航天大学学报, 2020, 46(11): 2018-2025.

YUE Xishan, YAN Qun, ZHAO Wei, XIE Zonghong. Influence of one side facesheet crack damage on flexural properties of titanium honeycomb sandwich structures[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(11): 2018-2025.

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单侧面板裂纹损伤对钛合金蜂窝夹层结构弯曲性能影响

Influence of one side facesheet crack damage on flexural properties of titanium honeycomb sandwich structures

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