Energy dissipation characteristics of covalently-bonded stochastic carbon nanotube networks under compressive loading

Kırkayak L., Bilgili D., Kırca M.

COMPOSITES PART B-ENGINEERING, cilt.172, ss.195-205, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 172
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.compositesb.2019.05.022
  • Dergi Adı: COMPOSITES PART B-ENGINEERING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.195-205
  • Anahtar Kelimeler: Nano-structures, Buckling, Computational modelling, SHEAR DEFORMATION-THEORY, STRAIN-RATE, MECHANICAL-PROPERTIES, IMPACT RESPONSE, BEHAVIOR, VIBRATION, COMPOSITES, GRAPHENE, NANOCOMPOSITES, NANOBEAMS
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

In this study, energy dissipation characteristics of covalently-bonded stochastic carbon nanotube (CNT) networks are comprehensively studied by means of molecular dynamic simulations. A previously-developed stochastic algorithm is used to generate three distinct numerical specimens which are subjected to two cycles of compression and relaxation for three different compression ratios with varied strain rates. One of the significant findings obtained in this study demonstrates that covalently-bonded stochastic CNT networks exhibit hysteretic stress - strain relationships and dissipate a significant portion of the energy absorbed during compression. Furthermore, it is observed that the hysteretic behavior of the covalently-bonded stochastic CNT network is enhanced by increasing the strain rate. Hence, the amount of energy dissipated by the covalently-bonded stochastic CNT network increases as the strain rate increases.