Comparative Analysis of Post-Buckling Torsional Response in Carbon/Aramid Hybrid and Carbon Fiber Composites: Experimental Evaluation of Synergistic Effects Beyond Macro-Scale Modeling Limits
Polymer Composites, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1002/pc.71567
- Dergi Adı: Polymer Composites
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Chemical Abstracts Core, Chimica, Compendex, INSPEC, Academic Search Ultimate (EBSCO), Materials Science & Engineering Collection (ProQuest), Pharma Collection (ProQuest), Technology Collection (ProQuest)
- Anahtar Kelimeler: buckling, carbon/aramid fabric, hybrid composites, polymers, post-buckling, torsion
- Orta Doğu Teknik Üniversitesi Adresli: Evet
Özet
This study investigates the buckling and post-buckling performance of Carbon Fiber Reinforced Epoxy (CFRE) and intraply Carbon/Aramid Fabric Reinforced Epoxy (C/AFRE) composite plates through an integrated experimental and numerical approach. A repeatable two-phase testing procedure that utilizes a programmable control logic for real-time buckling detection is used to determine the onset buckling and immediately measure the post-buckling torsional behavior. The algorithm monitors the Percent Stiffness Deviation Variable derived from a Linear Least Square Regression of the axial load–displacement response, automatically triggering the transition from compressive to torsional loading upon reaching a 10% stiffness reduction threshold. Experimental results were used to validate a Finite Element Analysis (FEA) framework developed in ABAQUS/Standard. While the FEA model demonstrated high accuracy for CFRE specimens, it overestimated the post-buckling stiffness reduction for the hybrid C/AFRE laminates. This localized enhancement in post-buckling integrity, which was absent in the pure carbon fiber samples, serves as an indicator of possible intraply synergistic interactions that the macro-scale models failed to anticipate. The results highlight the effectiveness of the proposed real-time detection methodology and suggest that higher-fidelity, meso-scale modeling is necessary to fully capture the post-buckling behavior of intraply hybrid composites.