Some aspects on the mechanical behavior of high-order surface/interface stresses in three-dimensional configurations

• Main Authors: Kun-ChungHsu, 許昆中
• Other Authors: Tung-Yang Chen
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/18125171893232776794

碩士 === 國立成功大學 === 土木工程學系碩博士班 === 100 === When the size of solids or structures is in the nanometer scale, the effect of surface/interface stresses on the overall mechanical behavior cannot be ignored. Based on the kinematic deformation of Kirchhoff-Love assumption for the interphase between two neighboring media, we have modeled the high-order interface stresses effects in three-dimensional Cartesian coordinate system. Depending on the difference in stiffness and length scales of the interphase, it is shown that the interface conditions can be classified into several different types. Additionally, by using variation approach, high-order interface conditions were derived for composite with spherical inclusions under different deformation modes. To illustrate the high-order effect of interface stress in the thin film/substrate system, we also refine the Stoney formula and provide a modified formulation.