Multifunctional Polymer Matrix Composites

Asghar, Sajid; Syed, Haroon K.; Liew, Kai Bin; Khan, Ikram Ullah; Salman, Saad

doi:10.1016/b978-0-12-819724-0.00024-0

Cited by 2 publications

(1 citation statement)

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“…Their constantly growing demand in industrial applications led the scientific community to the development of advanced composite configurations [2]. These advanced composites can satisfy all the essential requirements for use in aeronautics and simultaneously possess multiple functionalities (multi-functional composites) [3,4]. The prerequisites for advanced composites, apart from high specific properties, are typically high fracture toughness and good fatigue performance.…”

Section: Introductionmentioning

confidence: 99%

3R Composites: Knockdown Effect Assessment and Repair Efficiency via Mechanical and NDE Testing

et al. 2022

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In this study, the mechanical properties of purposefully synthesized vitrimer repairable epoxy composites were investigated and compared to conventional, commercial systems. The purpose was to assess the knockdown effect, or the relative property deterioration, from the use of the vitrimer in several testing configurations. Mechanical tests were performed using ILSS, low-velocity impact, and compression after impact configurations. At modeled structure level, the lap strap geometry that can simulate the stiffening of a composite panel was tested. Several non-destructive evaluation techniques were utilized simultaneously with the mechanical testing in order to evaluate (i) the production quality, (ii) the damage during or after mechanical testing, and (iii) the repair efficiency. Results indicated that the new repairable composites had the same mechanical properties as the conventional aerospace-grade RTM6 composites. The electrical resistance change method proved to be a valuable technique for monitoring deformations before the initiation of the debonding and the progress of the damage with consistency and high sensitivity in real time. In terms of repair efficiency, the values ranged from 70% to 100%.

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Section: Introductionmentioning

confidence: 99%