Improvement of the mode II interface fracture toughness of glass fiber reinforced plastics/aluminum laminates through vapor grown carbon fiber interleaves

Huiming Ning, Yuan Li, Ning Hu, Yanping Cao, Cheng Yan, Takesi Azuma, Xianghe Peng, Liangke Wu, Jinhua Li, Leilei Li

    Research output: Contribution to journalArticlepeer-review

    6 Citations (Scopus)

    Abstract

    The effects of acid treatment, vapor grown carbon fiber (VGCF) interlayer and the angle, i.e., 0° and 90°, between the rolling stripes of an aluminum (Al) plate and the fiber direction of glass fiber reinforced plastics (GFRP) on the mode II interlaminar mechanical properties of GFRP/Al laminates were investigated. The experimental results of an end notched flexure test demonstrate that the acid treatment and the proper addition of VGCF can effectively improve the critical load and mode II fracture toughness of GFRP/Al laminates. The specimens with acid treatment and 10 g m-2 VGCF addition possess the highest mode II fracture toughness, i.e., 269% and 385% increases in the 0° and 90° specimens, respectively compared to those corresponding pristine ones. Due to the induced anisotropy by the rolling stripes on the aluminum plate, the 90° specimens possess 15.3%-73.6% higher mode II fracture toughness compared to the 0° specimens. The improvement mechanisms were explored by the observation of crack propagation path and fracture surface with optical, laser scanning and scanning electron microscopies. Moreover, finite element analyses were carried out based on the cohesive zone model to verify the experimental fracture toughness and to predict the interface shear strength between the aluminum plates and GFRP laminates.

    Original languageEnglish
    Article number035004
    JournalScience and Technology of Advanced Materials
    Volume15
    Issue number3
    DOIs
    Publication statusPublished - 2014 Jun

    Keywords

    • GFRP/Al laminates
    • interlaminar mechanical properties
    • mode II fracture toughness
    • vapor grown carbon fiber (VGCF)

    ASJC Scopus subject areas

    • Materials Science(all)

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