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    Enhancement of fracture toughness in secondary bonded CFRP using hybrid thermoplastic/thermoset bondline architecture

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    Name:
    2020_Yudhanto_CST_uncorrected.pdf
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    2.062Mb
    Format:
    PDF
    Description:
    Accepted manuscript
    Embargo End Date:
    2022-08-11
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    Type
    Article
    Authors
    Yudhanto, Arief cc
    Almulhim, Mohammed
    Kamal, Faisal
    Tao, Ran cc
    Fatta, L.
    Alfano, M.
    Lubineau, Gilles cc
    KAUST Department
    Composite and Heterogeneous Material Analysis and Simulation Laboratory (COHMAS)
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    KAUST Grant Number
    CRG2017
    Date
    2020-07-29
    Online Publication Date
    2020-07-29
    Print Publication Date
    2020-10
    Embargo End Date
    2022-08-11
    Submitted Date
    2020-01-29
    Permanent link to this record
    http://hdl.handle.net/10754/664613
    
    Metadata
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    Abstract
    Structures made of carbon fiber-reinforced polymer (CFRP) can be assembled using adhesive bonding. However, such bonding is prone to brittle delamination, and a method to improve delamination resistance is desirable. Here, we propose a technique to introduce crack-arrest features that increase the R-curve response by engineering the adhesive bondline/interface. We specifically designed a wavy net-like thermoplastic insert that was embedded into the thermoset adhesive bondline where the new mechanisms of energy dissipation were generated. We demonstrate that the technique is effective at improving mode I fracture toughness of secondary bonded carbon/epoxy by more than 400%. The hybrid thermoset/thermoplastic bondline architecture was carefully tailored to achieve its best performance. We demonstrate that introducing porosities in the adhesive bondline (by adding a limited amount of thermoset adhesive) further improves the fracture toughness. This toughness improvement originates from the extrinsic toughening of the crack-arrest feature, which is enabled by the insert ductility and microstructures (via strand formation, anchoring and stretching).
    Citation
    Yudhanto, A., Almulhim, M., Kamal, F., Tao, R., Fatta, L., Alfano, M., & Lubineau, G. (2020). Enhancement of fracture toughness in secondary bonded CFRP using hybrid thermoplastic/thermoset bondline architecture. Composites Science and Technology, 199, 108346. doi:10.1016/j.compscitech.2020.108346
    Sponsors
    The research funding was supported by Office of Sponsored Research (OSR) of KAUST (King Abdullah University of Science and Technology) under the award number OSR-CRG2017-3388. We also thank COHMAS Laboratory Researchers: Mr. Anh-Quan Vu for assisting preliminary FRT test, Mr. Omar Qahtani for preliminary DCB test and 3D printing and Dr. Ahmed Wagih for Mode II test data.
    Publisher
    Elsevier BV
    Journal
    Composites Science and Technology
    DOI
    10.1016/j.compscitech.2020.108346
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S0266353820302967
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.compscitech.2020.108346
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program

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