THE INFLUENCE OF GEOMETRY ON THE ENERGY ABSORPTION CAPABILITY OF COMPOSITE STRUCTURES MADE OF WOVEN FABRIC PREPREGS

Engül M. C., DEMİR S., Ersoy N.

23rd International Conference on Composite Materials, ICCM 2023, Belfast, İngiltere, 30 Temmuz - 04 Ağustos 2023 identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Belfast
  • Basıldığı Ülke: İngiltere
  • Anahtar Kelimeler: Composites, FEA, Sinusoidal Geometry, Specific Energy Absorption, Woven prepregs
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

While composite structures have superior performance related to energy absorption, failure mechanisms for various geometries occurring during the crushing process and their influence on Specific Energy Absorption (SEA) are still unclear. Therefore, there is a requirement for a systematic study to investigate the influence of geometry on SEA, starting from simple geometries to more complex structures. This paper presents both experimental and numerical investigations of the crushing process for structures made of woven fabric prepregs including flat coupons and sinusoidal geometries with different diameters and number of curvatures. In numerical analysis, a Finite Element (FE) modelling approach is developed in order to predict crushing behaviour of tested composite structures. Results are discussed and compared in terms of the observed failure mechanisms.