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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2016, Vol. 37 ›› Issue (7): 2225-2233.doi: 10.7527/S1000-6893.2015.0265

• Solid Mechanics and Vehicle Conceptual Design • Previous Articles     Next Articles

Experimental research on mechanical properties of 3D full 5-direactional braided composites lugs

LIU Zhenguo, LIN Qiang, YA Jixuan, HU Long, WANG Yibo   

  1. School of Aeronautic Science and Engineering, Beihang University, Beijing 100083, China
  • Received:2015-08-17 Revised:2015-09-29 Online:2016-07-15 Published:2015-11-03
  • Supported by:

    Provincial/Ministerial Project Level

Abstract:

The mechanical properties of the 3D full 5-directional braided composites lugs on axial tension are studied based on experiments. The 3D braided composites lugs used for the study are made of T700-12K carbon fiber braided by 4-step braiding technique and solidified with TDE-85 epoxy by resin transfer molding (RTM) technique. The mechanical properties of the experimental samples which consist of two geometries and two methods for the holes (drilled and braided separately) are investigated. The results of these experiments show that the strength of the braided hole lug is six times that of the drilled one lug for the same size and same braiding technique. For the same hole diameter and thickness lug, with the increase of the width of the lug, the final failure load increases significantly, but the initial failure load improves a little.

Key words: D braiding, composite, lug, experimental research, mechanical properties

CLC Number: