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Zhu Youli
Faculty of Materials Science
and Engineering,
Academy of Armored Force Engineering,
Beijing 100072, China
Rożniatowski K
Kurzydłowski K
Faculty of Materials Science
and Engineering,
Warsaw University of Technology,
Warsaw 00-661, Poland
Huang Yuanlin
Xu Binshi
Faculty of Materials Science
and Engineering,
Academy of Armored Force Engineering,
Beijing 100072, China |
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Finite
Element Analysis of
Substrate Local Plastic
Deformation Induced by
Cracked Thin Hard Film*
Abstract: It has been postulated that, with tensile loading conditions, micro-cracks on thin hard film act as stress concentrators enhancing plastic deformation of the substrate material in their vicinity. Under favorable conditions the localized plastic flow near the cracks may turn into macroscopic plastic strain thus affects the plasticity behaviors of the substrate. This phenomenon is analyzed quantitatively with finite element method with special attention focused on the analysis and discussion of the effects of plastic work hardening rate, film thickness and crack depth on maximum plastic strain, critical loading stress and the size of the local plastic deformation zone. Results show that micro-cracks on thin hard film have unnegligible effects on the plasticity behaviors of the substrate material under tensile loading
Key words:
Thin film Micro-crack Finite element method Plastic deformation |