导航

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2014, Vol. 35 ›› Issue (1): 195-202.doi: 10.7527/S1000-6893.2013.0307

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

Influence of Z-pins Insertion Pattern on In-plane Compression Properties of Laminates

ZHANG Xiangyang, LI Yong, CHU Qiyi, XIAO Jun, DONG Xiaoyang   

  1. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2013-04-15 Revised:2013-06-13 Online:2014-01-25 Published:2013-06-15
  • Supported by:

    Military Product Item (JPPT-1146)

Abstract:

Z-pin technology is a notable method for laminated composites to improve the resistance to delamination. However, the presence of the Z-pins unavoidably leads to a degradation of the in-plane strength of the composite. This paper mainly explores the influence of the Z-pin insertion pattern on the in-plane compression performance of laminates by testing the compression properties of laminates with Z-pins inserted in different patterns. Meanwhile, the influencing mechanism is researched by means of finite element analysis. The results show that the through-thickness reinforcing pins decreases the compressive strength by vitiating several bunches of load-bearing fiber. The compression strength of Z-pinned laminates is inversely proportional to the fraction of the Z-pins inserted in the cross-section vertical to the compression loading direction. If permitted by the demands of inter-layer reinforcement, Z-pins should be distributed along the compressive loading direction.

Key words: Z-pin reinforced laminates, insertion pattern, compression strength, degradation, influence law

CLC Number: