Impact of surface stress on stress concentration
Impact of surface stress on stress concentration
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DOI：
10.1016/j.ijsolstr.2005.05.041
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发表时间：
2006-10-01
影响因子：
3.6
通讯作者：
Li, Z. R.
中科院分区：
文献类型：
--
作者：
He, L. H.;Li, Z. R.
在连续介质表面弹性理论框架下，研究了表面应力对弹性介质中球形孔洞附近应力集中的影响。假设孔洞为球形，弹性介质为弹性各向同性且无限延伸。利用Papkovitch-Neuber位移势，得到了单向远距离载荷作用下的弹性场。数值结果表明，当孔洞尺寸减小到纳米尺度时，表面应力的影响变得显著，导致孔洞附近的应力集中不仅与孔洞尺寸有关，而且与远程载荷有关。(c)2005爱思唯尔有限公司保留所有权利。
Effect of surface stress on stress concentration near a spherical void in an elastic medium is examined in the framework of continuum surface elasticity. It is assumed that the void is of spherical shape, and the elastic medium is elastically isotropic and infinitely extended. By using the Papkovitch-Neuber displacement potentials, the elastic field caused by a unidirectional remote load is obtained explicitly. Numerical results show that the influence of surface stress becomes remarkable when the size of the void is reduced to nanometer scale, leading to that stress concentration near the void depends not only on the void size but also on the remote load. (c) 2005 Elsevier Ltd. All rights reserved.