期刊
MECHANICS OF MATERIALS
卷 39, 期 9, 页码 845-864出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mechmat.2007.02.004
关键词
segmentation cracking; delamination; fracture energy; oxide coating
On the basis of analytical modelling of delamination of a thin film on a stretched substrate an energy model of film segmentation cracking has been formulated. The model focuses on a topological transformation between an intact and a damaged structure, rather than on a constitutive modelling of fracture itself. An energy transition condition should be satisfied in order for cracks to occur. The model provides a unique solution in the number of cracks for given material parameters. It has been validated by measuring the fracture energy of a silicon oxide thin film deposited on a poly(ethylene terephthalate) (PET) substrate, where a constant value of plastic shear stress at the film/substrate interface can be assumed. (c) 2007 Elsevier Ltd. All rights reserved.
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