Numerical estimation of stress intensity factors in cracked functionally graded piezoelectric materials - A scaled boundary finite element approach

被引:24
作者
Pramod, A. L. N. [1 ]
Ooi, Ean Tat [2 ]
Song, Chongmin [3 ]
Natarajan, Sundararajan [1 ]
机构
[1] Indian Inst Technol Madras, Integrated Modelling & Simulat Lab, Dept Mech Engn, Madras 600036, Tamil Nadu, India
[2] Federat Univ, Sch Sci Engn & Informat Technol, Ballarat, Vic 3350, Australia
[3] Univ New South Wales, Sch Civil & Environm Engn, Sydney, NSW 2031, Australia
关键词
Scaled boundary finite element method; Polygons; Functionally graded materials; Peizoelectric; Stress intensity factors; Electrical displacement intensity factor; FRACTURE-ANALYSIS; T-STRESS; BEHAVIOR; FIELDS; REPRESENTATION; SINGULARITIES; PROPAGATION;
D O I
10.1016/j.compstruct.2018.08.006
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
The stress intensity factors and the electrical displacement intensity factor for functionally graded piezoelectric materials (FGPMs) are influenced by: (a) the spatial variation of the mechanical property and (b) the electrical and mechanical boundary conditions. In this work, a semi-analytical technique is proposed to study the fracture parameters of FGPMs subjected to far field traction and electrical boundary conditions. A scaled boundary finite element formulation for the analysis of functionally graded piezoelectric materials is developed. The formulation is linearly complete for uncracked polygons and can capture crack tip singularity for cracked polygons. These salient features enable the computation of the fracture parameters directly from their definition. Numerical examples involving cracks in FGPMs show the accuracy and efficiency of the proposed technique.
引用
收藏
页码:301 / 312
页数:12
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