进行了复合材料一铝合金三钉单搭连接单向拉伸试验，测量了层合板面内位移、应变和离面位移随载荷的变化关系，建立了复合材料多钉单搭连接的三维累积损伤有限元模型，计算与试验对比结果表明，该模型可模拟大范围损伤发生之前的承载特性。采用试验和数值模拟相结合的方法研究了复合材料一金属三钉单搭连接钉载分布情况，结果表明：试验用复合材料-铝合金三钉单搭连接，螺栓1承载比例最高，螺栓3次之，中间螺栓的承载比例最低，并且螺栓承载比例在加载过程中基本保持不变；随着金属连接板刚度的增加，螺栓1的承载比例增加，螺栓3承载比例降低，中间螺栓2的承载比例变化较小，层合板离面位移减小；金属板配合间隙变化对钉载分布影响很小，但层合板的离面位移随配合间隙的增大而增大。
The uniaxial tension experiments of 3-bolted single-lap composite aluminum joints were conducted to measure the variation of in-plane displacement, strain and out-of-plane displacement with the applied load. A 3D progressive damage finite element model （FEM） was developed to simulate the bearing behavior of the multi-bolted single-lap composite joints. The comparison between the FEM and experimental result shows that the model can predict the bearing behavior before the widespread damage. The pin-load distribution was analyzed by FEM and experimental methods. It can be concluded that the most proportion of load is transferred by bolt 1, followed by bolt 3, and the bolt 2 transferred the least proportion of load for the sample used for experiment. The proportion of load transferred by each bolt is constant during the load-applied process. With the increasing of the metal plate stiffness, the loads transferred by bolt 1 increase and decrease transferred by bolt 3, and the loads transferred by bolt 2 change little. While the out- of- plane displacement decreases significantly. The variation of clearance has minor effect on the proportion of load transferred by each bolt, but the out-of-plane displacement increases with the clearance increasing.
参考文献
| [1] | Surachate C, Alvin P B. Effect of pitch distance, row spacing, end distance and bolt diameter on multi- fastened composite joints [J].Composites Part A: Applied Science and Manufacturing, 1996, 27(2): 105-110. |
| [2] | 宋恩鹏,刘文埏,谢鸣九,等.刚度比对复合材料多钉连接钉载分配影响研究[J].飞机设计,2005,12(4):29-32. |
| [3] | McCarthy C T, Gray P J, An analytieal model for the prediction of load distribution in highly torque multi- bolt composite joints [J]. Composite Structures, 2011, 93(2), 287-298 |
| [4] | McCarthy C T, McCarthy M A, Lawlor V P. Progressive damage analysis of multi- bolt composite joints with variable bolt-hole clearances [J]. Composites Part B: Engineering, 2005, 36(4): 290-305. |
| [5] | Lawlor V P, McCarthy M A, Stanley W F. An experimental study of bolt- hole clearance effects in double- lap, multi- bolt composite joints [J]. Composite Structures, 2005, 71(2) : 176-190. |
| [6] | 张爽,王栋,郦正能,等.复合材料层合板多钉连接结构累积损伤过程可视化仿真模拟[J].复合材料学报,2006,23(3):135-140. |
| [7] | Johan E, Joakim S, Gunnar M. Secondary bending in multi fastener, composite-to-aluminum single shear lap joints [J]. Composites Part B: Engineering, 2005, 36(3): 195-208. |
| [8] | Johan E, Joakim S. Finite element modeling and optimization of load transfer in multi - fastener joints using structural elements [J]. Composite Structures, 2008, 82(2): 245-256. |
| [9] | Gray P J, McCarthy C T. A global bolted joint model for finite element analysis of load distributions in multi - bolt composite joints [J]. Composites Part B: Engineering, 2010, 41(4) : 317-325. |
| [10] | Xiong Y. An analytical method for failure prediction of multi- fastener composite joints[J]. International Journal of Solids and Structures, 1996, 33(29): 4395-4409. |
| [11] | Starikov R, Schon J. Quasi-static behavior of composite joints with protruding-head bolts [J]. Composite Structure, 2001, 51(4) : 411-425. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%