湿热环境下K-cor夹层复合材料的力学性能

doi:10.7527/S1000-6893.2015.0251

Abstract

Abstract:

K-cor sandwich is a new kind of foam sandwich reinforced by Z-pin techniques. The absorption curves of different samples by changing the implanted density of Z-pin are investigated, and the effect of the hydrothermal condition on the three point bending and compressive properties of the samples with changing parameters of Z-pin are also determined. The results indicate that Z-pin improves the dimensional stability of the samples by changing the implanted density in sandwich structure, but it does not affect the moisture absorption rate. The sample which increases the implanted density of Z-pin can significantly improve the three point bending strength and compressive strength under dry and wet conditions, and the samples have a higher strength retention rate. The three point bending strength of K-cor with Z-pin density of 12 mm×12 mm in wet condition is improved by 11.1%, and the compressive strength of K-cor with Z-pin density of 8 mm×8 mm in wet condition is improved by 17.5% compared with blank sandwich structure in dry condition. It shows that K-cor sandwich structure has excellent wet and heat resistance. The samples which reduce implantation angle of Z-pin can significantly increase the compressive strength under dry and wet conditions. The compressive strength of K-cor sample with Z-pin of 0° in wet condition is the same as Z-pin of 40° in dry condition. But this factor has less influence on three point bending strength.

Key words: K-cor sandwich structure, Z-pin, hygrothermal, three point bending property, compressive property

CLC Number:

V258
TB332

SHEN Yufeng, LI Yong, WANG Xin, HUAN Dajun. Mechanical properties of K-cor sandwich composite under hygrothermal environment[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(7): 2303-2311.

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Mechanical properties of K-cor sandwich composite under hygrothermal environment

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