Cohesive modeling of crack nucleation in a cylindrical electrode under axisymmetric diffusion induced stresses

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:48

Article

Bhandakkar, Tanmay K.¹  Gao, Huajian¹ 

[1] Brown Univ, Sch Engn, Providence, RI 02912 USA

关键词: Intercalation-deintercalation;    Diffusion-induced stress;    Lithium electrodes;    Fracture;    Flaw tolerance;    Cohesive zone;    Nanowire;   

DOI  :  10.1016/j.ijsolstr.2011.04.005

来源: Elsevier

【 摘 要 】

We have recently modeled crack nucleation in a 2D strip electrode as localization of a periodic array of cohesive zones subject to diffusion induced stresses in an initially crack-free thin strip under galvanostatic solute insertion and extraction. Here we generalize this model to crack nucleation in a cylindrical electrode under axisymmetric diffusion induced stresses, focusing on the effect of the cylindrical geometry on the crack nucleation condition. Similar to our previous findings for the 2D strip geometry, the present analysis identifies a critical electrode size, typically in the nanometer range, to avoid crack nucleation. (C) 2011 Elsevier Ltd. All rights reserved.

【 授权许可】

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