The frictional contact problem of sliding rigid parabolic stamps on graded materials
9th International Conference on Multiscale and Functionally Graded Materials, Hawaii, Amerika Birleşik Devletleri, 15 - 18 Ekim 2006, cilt.973, ss.784-785, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Cilt numarası: 973
- Basıldığı Şehir: Hawaii
- Basıldığı Ülke: Amerika Birleşik Devletleri
- Sayfa Sayıları: ss.784-785
- Anahtar Kelimeler: FGM coatings, contact stresses, circular stamp, singular integral equations, MECHANICS, COATINGS
- Orta Doğu Teknik Üniversitesi Adresli: Evet
Özet
This study presents an analytical procedure to determine the contact stress distribution at the surface of an FGM coating perfectly bonded to a homogeneous substrate. The coating is assumed to be loaded by a rigid stamp of a semi-circular or circular profile. Using Fourier transformations, the contact mechanics problems are reduced to a singular integral equation of the second kind. Singular behavior of the unknown contact stress distribution at the end points is determined by following a function theoretic method. The singular integral equation is solved numerically using an expansion-col location technique. Main results of the study are the normal and lateral contact stress components and required contact forces as functions of material parameters. It is shown that a substrate that is softer than the FGM coating could be useful in decreasing the magnitude of the positive lateral stress at the trailing end of the contact.