Crack initiation angles in functionally graded materials under mixed mode loading

Oral A., Abanto-Bueno J. L., Lambros J., Anlas G.

9th International Conference on Multiscale and Functionally Graded Materials, Hawaii, Amerika Birleşik Devletleri, 15 - 18 Ekim 2006, cilt.973, ss.248-249 identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 973
  • Basıldığı Şehir: Hawaii
  • Basıldığı Ülke: Amerika Birleşik Devletleri
  • Sayfa Sayıları: ss.248-249
  • Yıldız Teknik Üniversitesi Adresli: Hayır

Özet

In this study, quasi-static crack initiation under mixed mode loading in planar (2-D) functionally graded materials is presented. First, crack initiation in the homogeneous material which forms the basis of our FGM - polyethylene - is studied. The Generalized Maximum Tangential Stress Criterion (GMTS) is applied through use of finite elements to determine crack initiation angles in a cracked 2-D functionally graded material. The effects of crack length, T-stress, inherent length scale r(c) and mode mixity are discussed. Computational results of crack initiation angles are compared to experimental results obtained using functionally graded polyethylene. Stress Intensity factors for a center cracked FGM are calculated.