Impact Analysis of Connection Strength Between Composite Stringer and Titanium Alloy Joint With Out-of-Tolerance

ZHOU Jin; LI Botao; ZENG Jianjiang; TONG Mingbo

doi:10.16080/j.issn1671-833x.2018.03.095

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Impact Analysis of Connection Strength Between Composite Stringer and Titanium Alloy Joint With Out-of-Tolerance

更新时间：2025-10-30

- Impact Analysis of Connection Strength Between Composite Stringer and Titanium Alloy Joint With Out-of-Tolerance
- Aeronautical Manufacturing Technology Vol. 61, Issue 3, Pages: 95-100(2018)
- 作者机构：
  
  1. 南京航空航天大学航空宇航学院,南京,210016
  2. 江苏自动化研究所,连云港,222006
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.2018.03.095
  CLC：
- Published：2018
- 稿件说明：
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周进，李波涛，曾建江，童明波. 复材长桁与钛合金接头超差对连接强度的影响[J]. 航空制造技术, 2018, 61(3): 95-100.

ZHOU Jin, LI Botao, ZENG Jianjiang, TONG Mingbo. Impact Analysis of Connection Strength Between Composite Stringer and Titanium Alloy Joint With Out-of-Tolerance[J]. Aeronautical Manufacturing Technology, 2018, 61(3): 95-100.
周进，李波涛，曾建江，童明波. 复材长桁与钛合金接头超差对连接强度的影响[J]. 航空制造技术, 2018, 61(3): 95-100. DOI： 10.16080/j.issn1671-833x.2018.03.095.

ZHOU Jin, LI Botao, ZENG Jianjiang, TONG Mingbo. Impact Analysis of Connection Strength Between Composite Stringer and Titanium Alloy Joint With Out-of-Tolerance[J]. Aeronautical Manufacturing Technology, 2018, 61(3): 95-100. DOI： 10.16080/j.issn1671-833x.2018.03.095.

摘要

针对复材长桁与钛合金接头因制造缺陷无法正常连接的情况，设计了正常连接、长桁立边失效连接、长桁自由边失效连接3 种连接形式的对比试验，并采用有限元分析了超差连接情况下结构的破坏模式与破坏载荷的变化规律。结果表明：3 种连接形式结构的破坏模式一致，均在蒙皮预制裂纹处沿着45°纤维方向破坏；不同连接形式对连接刚度基本没有影响；长桁立边失效对连接强度影响较小，破坏载荷下降5.31%；长桁自由边失效对连接强度影响较大，破坏载荷下降22.13%。长桁自由边失效是最严重的失效情况。

Abstract

For the condition that composite stringer cannot connect the titanium joints properly due to the manufacturing defect

three kinds of connecting type comparison tests are designed and the test conditions are normal connection

stringer vertical edge with failure and stringer free edge with failure

respectively. FEM is used to study the changes of the failure mode and failure load of the structure under the out-of-tolerance condition. The results show that the three connection type structures have the same failure mode which fails along the 45° fiber of the skin precast crack; three different conditions almost have no influence on connection stiffness; the condition that stringer vertical edge with failure has less effect on connection strength

the failure loads decrease 5.31%; the condition that stringer free edge with failure has greater effect on connection strength

the failure loads decrease 22.13%. The condition that stringer free edge with failure is the most severe failure condition.

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