EXPERIMENTAL RESEARCH ON FAILURE OF COMPOSITE SANDWICH π-JOINT

CHENG LiNan; CHI Jian; QU TianJiao; YU Xin

doi:10.16579/j.issn.1001.9669.2020.04.012

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EXPERIMENTAL RESEARCH ON FAILURE OF COMPOSITE SANDWICH π-JOINT

更新时间：2022-09-22

- EXPERIMENTAL RESEARCH ON FAILURE OF COMPOSITE SANDWICH π-JOINT
- Journal of Mechanical Strength Vol. 42, Issue 4, Pages: 837-841(2020)
- 作者机构：
  
  1. 中国飞机强度研究所全尺寸飞机结构静力/疲劳航空科技重点实验室
  2. 中航工业成都飞机设计研究所
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2020.04.012
  CLC：
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CHENG LiNan, CHI Jian, QU TianJiao, et al. EXPERIMENTAL RESEARCH ON FAILURE OF COMPOSITE SANDWICH π-JOINT. [J]. 42(4):837-841(2020)
DOI：

CHENG LiNan, CHI Jian, QU TianJiao, et al. EXPERIMENTAL RESEARCH ON FAILURE OF COMPOSITE SANDWICH π-JOINT. [J]. 42(4):837-841(2020) DOI： 10.16579/j.issn.1001.9669.2020.04.012.

摘要

针对夹芯复合材料π型接头的拉伸和侧弯承载能力以及连接需求,并充分考虑温度的影响,设计了复合材料π型胶结接头,对其在上述两种载荷工况下分别进行了常温、低温、高温干态三种环境试验。分析π型接头失效过程:三角填充区为夹芯复合材料π型接头最薄弱部位,容易发生破坏,并决定结构承载能力;拉伸载荷下夹芯复合材料π型接头承载能力明显高于侧弯载荷;夹芯复合材料π型接头对低温不敏感,对高温较为敏感。

Abstract

The π-joint is put forward and the configuration is designed to meet the need for capacity of pull-off and lateral bending,considering the influence of temperature condition. The test result demonstrates that filler area is the weakest part of the sandwich π-joints where the damage first appears,and determines the capacity of structure. The capacity of π-joint under pull-off load highly than lateral bending load,and the failure mode of sandwich π-joint is sensitive to elevated temperature too cold temperature dry condition.

关键词

复合材料π型接头温度填充区失效

Keywords

Composite materialπ-jointsTemperatureFillerFailure

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