Evaluation of insert design on the performance of repaired composite-Ti alloy joints

Yun tao Zhu, Remko Akkerman, Jun jiang Xiong*, Chu yang Luo, Yi sen Du

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    1 Citation (Scopus)
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    Two kinds of titanium alloy inserts, namely bushing and embedded conical nut, were designed to repair the bearing damaged zone of screwed single-lap carbon fiber/polyimide composite-TC4 alloy joints, respectively. Quasi-static tensile tests were conducted to determine the effects of such repairs in terms of joint strength and joint stiffness concepts. Based on a simplified bearing model, the deformation mechanisms of titanium inserts influencing the joint performance are further discussed. It is concluded that: 1) the load-displacement curves of screwed joints consist of five characteristic stages; 2) the screw tilt significantly increases the failure load of the screw; 3) the use of an embedded conical nut aggravates the screw tilt, while the use of a bushing reduces the effect of screw tilt by distributing the bearing deformation evenly through the thickness. This difference leads to a different repair effect in terms of joint stiffness.

    Original languageEnglish
    Article number111506
    JournalComposite structures
    Early online date24 Sep 2019
    Publication statusPublished - 15 Dec 2019


    • UT-Hybrid-D
    • Joint stiffness
    • Metal inserts
    • Repair effect
    • CFRP-titanium alloy screwed joints

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