A novel hybrid damage monitoring approach to understand the correlation between size effect and failure behavior of twill CFRP laminates

Khan, Raja Muhammad Awais and Saeidiharzand, Shaghayegh and Emami Tabrizi, Isa and Ali, Hafiz Qasim and Yıldız, Mehmet (2021) A novel hybrid damage monitoring approach to understand the correlation between size effect and failure behavior of twill CFRP laminates. Composite Structures, 270 . ISSN 0263-8223 (Print) 1879-1085 (Online)

Full text not available from this repository. (Request a copy)


Despite the presence of numerous studies about size effect in composite materials, controversy still exists regarding the relation between mechanical behavior and size of the laminates. Therefore, in this study, a comprehensive experimental approach using combined structural health monitoring techniques namely, acoustic emission, digital image correlation and infrared thermography is conducted to elucidate the physics behind size effect in twill woven carbon fiber reinforced polymeric composites. Laminates with different thicknesses are produced and tested under tensile and in-plane shear loading conditions. In depth analysis of the acoustic emission data shows that an increase in the thickness of laminate changes the fraction of microdamage related to fiber failures. Moreover, a noticeable stagnation period in acoustic emission activity prior to global failure is observed for thick samples which is negligible for thin specimens. Furthermore, analysis of damage accumulation rate via acoustic emission technique is cross validated with digital image correlation and thermography for tensile and shear test results. The full field monitoring results indicate the inverse relation between the thickness of the laminates and damage growth rate. The combined usage of damage monitoring techniques shows that thicker laminates experiences slower damage growth dynamics as compared to those of thin laminates, thereby, assisting to understand the size effect in laminated composites.
Item Type: Article
Uncontrolled Keywords: Acoustic emission (AE); Digital image correlation (DIC); Infra-red thermography (IRT); Micro-damage; Size-effect; Twill CFRP
Divisions: Faculty of Engineering and Natural Sciences > Academic programs > Materials Science & Eng.
Faculty of Engineering and Natural Sciences
Integrated Manufacturing Technologies Research and Application Center
Depositing User: Mehmet Yıldız
Date Deposited: 03 Sep 2022 21:06
Last Modified: 03 Sep 2022 21:06
URI: https://research.sabanciuniv.edu/id/eprint/43473

Actions (login required)

View Item
View Item