Analysis of entropy generation rate for auxetic structures
International Journal of Exergy, cilt.50, sa.1, ss.28-37, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 50 Sayı: 1
- Basım Tarihi: 2026
- Doi Numarası: 10.1504/ijex.2026.153944
- Dergi Adı: International Journal of Exergy
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
- Sayfa Sayıları: ss.28-37
- Anahtar Kelimeler: damping, EGR, entropy generation rate, length scale parameter, LSP, natural frequency, re-entrant auxetic structure
- Ankara Yıldırım Beyazıt Üniversitesi Adresli: Evet
Özet
This study presents a novel investigation of the entropy generation rate (EGR) in a re-entrant auxetic structure using finite element analysis. Timoshenko beam stiffness and mass matrices are derived using a modified couple stress theory (MCST) to capture the size effects at micro/nano scales via a length scale parameter (LSP) l. Numerical simulations show the importance of LSP on the EGR for the structure. The results indicate that as the LSP ratio l/L increases from 0 to 0.1, the peak value of the EGR during the simulation period of 0 to 0.04 seconds decreases from 6 × 10-3 W/K to 0.3 × 10-3 W/K.