کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1561949 | 1513952 | 2012 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Wrinkling and creasing of a compressed elastoplastic film resting on a soft substrate Wrinkling and creasing of a compressed elastoplastic film resting on a soft substrate](/preview/png/1561949.png)
We reveal an interesting postbuckling phenomenon of an elastoplastic film resting on a soft substrate under in-plane compression. Finite element simulations show that with the increase in the applied compressive strain, the film first undergoes global sinusoidal wrinkling, followed by localized creasing. The physical mechanism underlying this transition lies mainly in the competition between elastic strain energy and plastic dissipation. The corresponding critical conditions of plastic yielding and localized creasing of the wrinkled film are given via theoretical analysis and numerical simulations. The reported results may facilitate the use of buckling-based technique to fabricate controlled surface patterns with desired physical properties.
► We study buckling and postbuckling of an elastoplastic film on a soft substrate.
► Film first undergoes periodic sinusoidal wrinkling, followed by localized creasing.
► The mechanism underlying this transition is analyzed from the viewpoint of energy.
► The critical conditions of plastic yielding and localized creasing are provided.
► The results may help fabricate surface patterns with desired physical properties.
Journal: Computational Materials Science - Volume 57, May 2012, Pages 111–117