EFFECT OF DIFFERENT STRUCTURAL PARAMETERS ON THE 7075ALUMINUM ALLOY LUG FATIGUE CRACK GROWTH LIFE

ZHOU Song; WANG HongDa; HUI Li; YANG WenJun; DI Jun

doi:10.16579/j.issn.1001.9669.2021.06.022

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EFFECT OF DIFFERENT STRUCTURAL PARAMETERS ON THE 7075ALUMINUM ALLOY LUG FATIGUE CRACK GROWTH LIFE

更新时间：2022-09-22

- EFFECT OF DIFFERENT STRUCTURAL PARAMETERS ON THE 7075ALUMINUM ALLOY LUG FATIGUE CRACK GROWTH LIFE
- Journal of Mechanical Strength Vol. 43, Issue 6, Pages: 1430-1435(2021)
- 作者机构：
  
  1. 沈阳航空航天大学机电工程学院
  2. 沈阳航空航天大学航空制造工艺数字化国防重点学科实验室
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2021.06.022
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ZHOU Song, WANG HongDa, HUI Li, et al. EFFECT OF DIFFERENT STRUCTURAL PARAMETERS ON THE 7075ALUMINUM ALLOY LUG FATIGUE CRACK GROWTH LIFE. [J]. 43(6):1430-1435(2021)
DOI：

ZHOU Song, WANG HongDa, HUI Li, et al. EFFECT OF DIFFERENT STRUCTURAL PARAMETERS ON THE 7075ALUMINUM ALLOY LUG FATIGUE CRACK GROWTH LIFE. [J]. 43(6):1430-1435(2021) DOI： 10.16579/j.issn.1001.9669.2021.06.022.

摘要

为探索不同结构参数对飞机耳片疲劳裂纹扩展寿命的影响,采用数值模拟与试验相结合的方法,分别对不同结构参数7075铝合金耳片试样进行疲劳试验,基于Abaqus软件建立了不同结构耳片的三维应力强度因子计算模型,并将有限元解和实验结果、解析值比较验证了该模型的准确性。最后,通过Paris公式和断裂力学方法计算比较了各结构参数耳片的裂纹扩展寿命。研究结果表明,在相同应力下,随着锥度角的增大,耳片疲劳裂纹扩展寿命迅速增加,而底部倒角对其几乎不产生影响。

Abstract

In order to explore the influence of different structural parameters on the aircraft lug structure crack growth life, using the combination of numerical simulation and test method, fatigue tests were carried out on different structural parameters 7075 aluminum alloy lug samples, the three-dimensional stress intensity factor calculation models of different lugs based on the ABAQUS software was established, the accuracy of the model is verified by comparing the finite element solution with the experimental results and analytical values. Finally, The fatigue crack growth life of lug with different structural parameters was calculated by the Paris formula and fracture mechanics method. The results indicate that under the same stress, with the increase of taper angle, the fatigue crack growth life of the lug structure increases rapidly, and the bottom chamfer have little effect on it.

关键词

耳片铝合金锥度角底部倒角裂纹扩展寿命

Keywords

LugAluminum alloyTaper angleChamfer at the bottomCrack growth life

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