Engineering Transactions, 66, 1, pp. 3-19, 2018
10.24423/engtrans.817.2018

Effects of Hole Perpendicularity Error on Load Distribution in Single-Lap Double-Bolt Composite Joints

Rupeng LI
Shanghai Aircraft Manufacturing Co. Ltd.
China

Ruiheng XIAO
Shanghai Aircraft Manufacturing Co. Ltd.
China

Ende GE
Shanghai Aircraft Manufacturing Co. Ltd.
China

Hang GAO
Dalian University of Technology
China

Yongjie BAO
Dalian University of Technology
China

Xueshu LIU
Dalian University of Technology
China

Although automated machines are widely used in composite structure manufacturing, manually drilled holes are usually necessary due to spatial constrains and holes with perpendicularity errors are occasionally generated as a result. Considering the anisotropic properties of composite material, the influences of hole perpendicularity error on mechanical performances of composite joints are different from those of isotropic material. In this study, the effects of hole perpendicularity error on load distribution in single-lap double-bolt composite joints are discussed. A finite element model is first developed and verified both by analytical and experimental results. Parametric studies are then carried out taking into consideration bolt torque and hole perpendicularity error, represented by hole tilting direction and tilting angle. It is found that the hole tilting direction significantly affects on load distribution in composite joints. Although the loads taken by bolts are not significantly affected, it may make one composite plate take more than 60% of total loads. In addition, the influences of tilting angle on load distribution can be ignored in most cases, and as for the bolt torque, it is to enhance the influence of hole tilting direction.
Keywords: bolted joints; perpendicularity error; tilting direction; load distribution
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Copyright © Polish Academy of Sciences & Institute of Fundamental Technological Research (IPPT PAN).

References

Stanley W.F., McCarthy M.A., Lawlor V.P., Measurement of load distribution in multi-bolt, composite joints, in the presence of varying clearance, Journal of Plastics, Rubber and Composites, 31(9): 412–418, 2002.

McCarthy M.A., Lawlor V.P., Stanley W.F., McCarthy C.T., Bolt-hole clearance effects and strength criteria in single-bolt, single-lap, composite bolted joints, Composites Science and Technology, 62(10–11): 1415–1431, 2002.

Soykok I.F., End geometry and pin-hole effects on axially loaded adhesively bonded composite joints, Composites Part B: Engineering, 77: 129–138, 2015.

Xie Z.H., Li X., Guo J.P., Xiong X., Dang X., Load distribution homogenization method of multi-bolt composite joint with consideration of bolt-hole clearance, Acta Materiae Compositae Sinica, 33(4): 806–813, 2016.

Liu L., Mao Y., Wei R., An analytical tool to predict load distribution of multi-bolt single-lap thick laminate joints, [in:] Proceedings of the 18th International Conference on Composite Materials(ICCM), Jeju Island, Korea, pp. 1–8, 2011.

McCarthy C.T., Gray P.J., An analytical model for the prediction of load distribution in highly torqued multi-bolt composite joints, Composite Structures, 93(2): 287–298, 2011.

Andriamampianina J., Alkatan F., Stéphan P., Guillot J., Determining load distribution between the different rows of fasteners of a hybrid load transfer bolted joint assembly, Aerospace Science and Technology, 23(1): 312–320, 2012.

Zhou Y., Fei Q., Tao J., Profile design of loaded pins in composite single lap joints: from circular to non-circular, Results in Physics, 6: 471–480, 2016.

Sharos P.A., Egan B., McCarthy C.T., An analytical model for strength prediction in multi-bolt composite joints at various loading rates, Composite Structures, 116: 300–310, 2014.

Lecomte J., Bois C., Wargnier H., Wahl J.-C., An analytical model for the prediction of load distribution in multi-bolt composite joints including hole-location errors, Composite Structures, 117: 354–361, 2014.

Taheri-Behrooz F., Shamaei Kashani A.R., Hefzabad R.N., Effects of material nonlinearity on load distribution in multi-bolt composite joints, Composite Structures, 125: 195–201, 2015.

Gómez S., Oñoro J., Pecharroman J., A simple mechanical model of a structural hybrid adhesive/riveted single lap joint, International Journal of Adhesion & Adhesives, 27(4): 263–267, 2007.

Moroni F., Pirondi A., Kleiner F., Experimental analysis and comparison of the strength of simple and hybrid structural joints, International Journal of Adhesion & Adhesives, 30(5): 367–379, 2010.

McCarthy M.A., McCarthy C.T., Lawlor V.P., Stanley W.F., Three-dimensional finite element analysis of single-bolt, single-lap composite bolted joint. Part I – model development and validation, Composite Structures, 71: 140–158, 2005.

McCarthy M.A., McCarthy C.T., Padhi G.S., A simple method for determining the effects of bolt-hole clearance on load distribution in single-column multi-bolt composite joints, Composite Structures, 73(1): 78–87, 2006.

Olmedo A., Santiuste C., Barbero E., An analytical model for predicting the stiffness and strength of pinned-joint composite laminates, Composites Science and Technology, 90: 67–73, 2014.

Wang P., He R., Chen H., Zhu X., Zhao Q., Fang D., A novel predictive model for mechanical behavior of single-lap GFRP composite bolted joint under static and dynamic loading, Composites: Part B, 79: 322–330, 2015.

Park H., Effects of stacking sequence and clamping force on the bearing strengths of mechanically fastened joints in composite laminates, Composite Structures, 53(2): 213–221, 2001.

Qin T., Zhao L., Zhang J., Fastener effects on mechanical behaviours of double-lap composite joints, Composite Structures, 100: 413–423, 2013.




DOI: 10.24423/engtrans.817.2018