Numerical implementation of imperfect interfaces

Numerical Implementation of Imperfect Interfaces

One approach to characterizing interfacial stiffness is to introduce imperfect interfaces that allow displacement discontinuities whose magnitudes depend on interfacial traction and on properties of the interface or interphase region. This work implemented such imperfect interfaces into both finite element analysis and the material point method. The finite element approach defined imperfect int...

Model of Imperfect Interfaces in Composite Materials and Its Numerical Solution by FETI Method

Analysis of material interfaces in composite materials is in the center of atten7 tion of many material engineers. The material interface influences significantly the overall 8 behaviour of composite materials. While the perfect bond on material interface is modelled 9 without larger difficulties, the imperfect bond between different components of composite ma10 terials still causes some obstac...

Perfect crystals grown from imperfect interfaces

The fabrication of advanced devices increasingly requires materials with different properties to be combined in the form of monolithic heterostructures. In practice this means growing epitaxial semiconductor layers on substrates often greatly differing in lattice parameters and thermal expansion coefficients. With increasing layer thickness the relaxation of misfit and thermal strains may cause...

Generalized Shear-Lag Analysis Including Imperfect Interfaces

Two recent papers showed that shear-lag analysis can be an effective tool for stress analysis of composites when done properly and when applied to problems for which it is appropriate. This paper extends the prior analysis of concentric cylinders to a generalized shear-lag analysis in which the transverse variations of shear stress are described by arbitrary shape functions. The shear-lag analy...

Transport properties of multigrained nanocomposites with imperfect interfaces