Size Effect on Inclined Cracking in Unidirectional Composites

Dönmez A. A.

JOURNAL OF APPLIED AND COMPUTATIONAL MECHANICS, cilt.7, sa.4, ss.2149-2158, 2021 (ESCI) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 7 Sayı: 4
  • Basım Tarihi: 2021
  • Doi Numarası: 10.22055/jacm.2020.33481.2234
  • Dergi Adı: JOURNAL OF APPLIED AND COMPUTATIONAL MECHANICS
  • Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), Scopus, Directory of Open Access Journals
  • Sayfa Sayıları: ss.2149-2158
  • Anahtar Kelimeler: Size effect, fiber composite, quasibrittle fracture, inclined cracking, FRACTURE, MODEL, DAMAGE
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

The fracture and size effect properties of the unidirectional (UD) laminae were investigated based on the fracture energy analysis. The crack propagations on inclined fiber orientation may result in different energy release mechanisms. Therefore, the size effect behavior of these types of failures may vary according to the fracture parameters of the UD composites. This study aims to develop a fracture analysis of UD plies with inclined fibers relative to the loading axis. A numerical work with a developed material model was conducted to predict the size effect trends. The size effect law was used to fit the strength reduction with increasing size. The fundamentals of the quasibrittle fracture mechanics are shown to be applicable to analyze these types of structures. It is shown that the composite structures as quasibrittle materials, can exhibit a significant size effect.