Bending of graded curved bars at elastic limits and beyond
Küçük Resim Yok
Tarih
2013
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Pergamon-Elsevier Science Ltd
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Analytical and computational models are developed to predict the stress response of functionally graded curved bars under pure bending in elastic and partially plastic states of stress. In the analytical model, the modulus of elasticity and in the computational model, both the modulus of elasticity and the hardening parameter of the bar material are assumed to vary in the radial direction. The analytical model is based on Tresca's yield criterion, its associated flow rule and ideal plastic material behavior, while the computational one is based on von Mises' yield criterion, total deformation theory and a Swift type nonlinear hardening law. The models are verified not only in comparison to the published solutions, but also in comparison to each other. The results indicate that the variation of material properties, especially the variation of modulus of elasticity, strongly affects the deformation behavior of the bar. In a graded bar, yielding may commence at the inner, at the outer or simultaneously at both surfaces despite the fact that yielding initiates at the inner surface in a homogeneous bar. Crown Copyright (c) 2012 Published by Elsevier Ltd. All rights reserved.
Açıklama
Anahtar Kelimeler
Curved bar, Functionally graded material (FGM), Elastoplasticity, Tresca's criterion, von Mises' criterion, Shooting method
Kaynak
International Journal of Solids and Structures
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
50
Sayı
5
