Plastic folding of buckling structures.
Plastic folding of buckling structures.
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DOI：
10.1103/physrevlett.99.046101
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发表时间：
2007-07
影响因子：
8.6
通讯作者：
J. Colin;C. Coupeau;J. Grilhé
中科院分区：
文献类型：
--
作者：
J. Colin;C. Coupeau;J. Grilhé
沉积在硅衬底上的金薄膜的自由表面的原子力显微镜观察已经证明了屈曲的膜和形成的水泡图案进行塑料折叠。经典的弹性屈曲和塑性变形的薄膜进行了分析的框架下的Föppl-Von卡门理论的薄板引入的概念，低角度倾斜边界和位错分布来描述这种折叠效果。它表明，在协议的弯曲晶体的基本塑性，这种倾斜边界的存在下，结果在形成的屈曲模式的能量低于“经典”的弹性水泡。
Atomic force microscopy observations of the free surface of gold thin films deposited on silicon substrates have evidenced the buckling of the films and the formation of blister patterns undergoing plastic folding. The classical elastic buckling and plastic deformation of the films are analyzed in the framework of the Föppl-Von Kármán theory of thin plates introducing the notion of low-angle tilt boundaries and dislocation distributions to describe this folding effect. It is demonstrated that, in agreement with elementary plasticity of bent crystals, the presence of such tilt-boundaries results in the formation of buckling patterns of lower energy than "classical" elastic blisters.