碳纤维增强环氧Z-pin拔脱性能

doi:10.7527/S1000-6893.2014.0117

Abstract

Abstract:

In order to study the influencing factors of Z-pin's interlaminar reinforcement, the Z-pin pullout experiment from poured body is used to analyze the influence of the Z-pin's embedded length, diameter and curing degree on the pullout performance. And the behavior of Z-pin being pulled out from laminates is compared to that from poured body to verify the feasibility of Z-pin pullout experiment characterizing the bonding condition. The results reveal that the maximum pullout force increased with the embedded length; the increase of Z-pin diameter contributed a linear rise to the maximum pullout force by enlarging the total contact area. The maximum pullout force of Ø0.7 mm Z-pin has jumped to 2.35 times that of Ø0.3 mm Z-pin. Furthermore, Z-pin's co-curing with the matrix resin could improve the interfacial shear strength, and the failure mechanism is changed from interfacial debonding to a combination of cohesive failure of matrix resin and the interfacial debonding. The consequent elevation of maximum pullout force could be up to 17 times.

Key words: Z-pin, interface, pullout experiment, co-curing, composites

CLC Number:

V258
TB332

CHU Qiyi, XIAO Jun, LI Yong, ZHANG Xiangyang, WANG Min. Pullout performance of carbon fiber/epoxy Z-pins[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015, 36(4): 1312-1319.

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Pullout performance of carbon fiber/epoxy Z-pins

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