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论文:2015,Vol:33,Issue(1):9-13 |
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引用本文： |
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冯蕴雯, 曹勇, 魏宇宏, 薛小锋. 含孔边套筒的厚截面复合材料接头耳片强度分析[J]. 西北工业大学学报 |
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Feng Yunwen, Cao Yong, Wei Yuhong, Xue Xiaofen. Analyzing Thick-Section Composites Lug with Hole Containing Boundary Sleeve[J]. Northwestern polytechnical university |
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| 含孔边套筒的厚截面复合材料接头耳片强度分析 |
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| 冯蕴雯1, 曹勇1, 魏宇宏2, 薛小锋1 |
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1. 西北工业大学航空学院, 陕西西安 710072;
2. 中航飞机西安飞机分公司, 陕西西安 710089 |
| 摘要: |
| 为研究含孔边防护套筒的厚截面复合材料层合板耳片连接件孔边层间应力分布规律及接头强度,提出了采用层合板子层和界面胶层相结合的有限元建模方法,在验证了建模方法对厚截面层合板应力求解的有效性的基础上,分析了承受轴向载荷的厚层合板耳片连接件孔边三维应力分布及接头失效情况。结果表明:套筒胶层的破坏应力和破坏位置主要集中在孔轴非接触区;当套筒胶层发生断裂时,厚截面层合板并未发生失效,限制了厚板接头耳片整体强度性能的提高。 |
| 关键词:
层合板
层间应力
复合材料
有限元方法
厚板
接头
轴承套筒
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| Analyzing Thick-Section Composites Lug with Hole Containing Boundary Sleeve |
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| Feng Yunwen1, Cao Yong1, Wei Yuhong2, Xue Xiaofen1 |
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1. College of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China;
2. AVIC Aircraft Xi'an Aircraft Branch, Xi'an 710089, China |
| Abstract: |
| A finite element(FE) modeling method with cohesive interface and sublaminates was proposed to study interlaminar stress distribution and strength of thick-section composite materials lug. And numerical calculation was carried out on the thick composite laminates three-point bending problem; effectiveness of modeling method for thick-section composite materials stress calculation was verified, Based on this, a three dimensional(3D) FE model of thick-section composite materials lug is designed; then the 3D stress distribution along the hole edge and failure mode of the lug subjected to axial load are discussed. The results and their analysis show preliminarily that:(1) the failure stress and damage position are mainly concentrated in the no contact region of the hole-axis; stiffer metal sleeves reduce the interlaminar stress concentrations of hole edge, however, this and higher radial tensile stresses in the region lead to reduced carrying capacity of the sleeves adhesive; (2) the adhesive of sleeves fails before the thick-section composites lug; this destroyed the integrity of the protective structure and will adversely affect the strength of the thick-section composites lug. |
| Key words:
calculations
composite materials
constitutive equations
design
efficiency
failure modes
finite element method
joints(structural components)
laminates
mathematical models
mesh generation
schematic diagrams
stiffness
stress concentration
three dimensional
bushing sleeve
interlaminar stress
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| 收稿日期: 2014-09-19
修回日期:
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| DOI: |
| 基金项目: 国家自然科学基金(10577015)与航空科学基金(2008ZA53006、2006ZD53050)资助 |
| 通讯作者:
Email： |
| 作者简介: 冯蕴雯(1968-),女,西北工业大学教授、博士生导师,主要从事复合材料结构设计与分析研究。
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参考文献: |
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[1] Hefflinger. Landing Gear Structure[M]. Washington, the Boeing Company, 2007:29-30
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[8] Olanrewaju Aluko. A Compact Analytic Method for Stress Distribution in Composite Pinned Joints[D]. Washington,D C, Howard University, 2006 |
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