Z-pin增强复合材料帽型加筋壁板接头拉伸性能

doi:10.7527/S1000-6893.2015.0259

Abstract

Abstract:

To enhance the joint strength on interface between the skin and the stiffener of polymer composites' hat stiffener wall structure, the 3D reinforcing technology of Z-pin is used for hat stiffener wall joints. Hat joint specimens reinforced with different configurations of Z-pin are manufactured and tested by tensile, the mechanism reinforced with Z-pin is analyzed and the effects of the volume fraction, diameter of the Z-pin and load span on the joint performance on interface between the skin and the stiffener are investigated. It turns out:when Z-pin's diameter is 0.5 mm and implant angle is 90°, the joint strength increases with Z-pin volume fraction increasing from 0% to 1.0%, but its increase trend slows down with Z-pin volume fraction increasing, the strength of hat joint with Z-pin fraction of 1.0% is higher than that without Z-pinned by 31.1%, thus the Z-pinned hat joints pull-off strength decreases with Z-pin volume fraction from 1.0% to 1.5%. The effect of the diameter of Z-pin on the pull-off strength of hat joint is not significant. With the increasing of the load span, the pull-off strength of hat joints reinforced with Z-pin fraction of 0.5% (diameter of 0.5 mm) decreases with the failure model transforming.

Key words: polymer composites, hat joints, Z-pin, joint performance, tensile test

CLC Number:

TB332

LI Wen, LI Yong, HUAN Dajun, CHU Qiyi, CHEN Haoran. Tensile performance of composites' hat stiffener reinforced wall joint by Z-pin[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(6): 2003-2012.

References

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Tensile performance of composites' hat stiffener reinforced wall joint by Z-pin

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