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Identification Of Boundary Conditions By Iterative Analyses Of Suitably Refined Subdomains At Biomaterials Interfaces
Published 2002 · Materials Science
ABSTRACT An iterative procedure for stress analysis of interfaces between dissimilar material is presented. The problem is specialised to the case of biomaterial interfaces with specific reference to materials which are characterised by tiny microstructure. The procedure is based on an alternate use of a refined mesh defined on subdomains and a coarse mesh defined on the whole domain. The refined mesh is used to give a proper description of the mechanical behaviour of the microstructures, whereas the coarse mesh is used to account both of the mutual interaction among the subdomains and of the interaction between subdomains and global boundary conditions. The procedure is defined as an identification problem where the minimum of a function is achieved by modifying displacement distributions at interfaces between subdomains. The numerical example reported in the paper shows that the procedure is effective regardless of the grade of heterogeneity of materials, in contrast to what has been found on the results obtained by using a coarse mesh on the whole domain.