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Dislocation
interacting with collinear rigid lines in piezoelectric
media
BingJin Chen, DongWei Shu and ZhongMin Xiao |
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Vol. 2 (2007), No. 1, 23–42
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Abstract |
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The electro-elastic interaction between a piezoelectric dislocation and collinear rigid lines embedded in a piezoelectric medium is studied in the framework of linear elastic theory. The rigid lines are considered, respectively, as dielectrics or conductors. We present a general solution of the problem based on the extended Stroh’s formalism. Explicit expressions of the field intensity factors are obtained for the special case of a single rigid line. The image force acting on the piezoelectric dislocation due to the presence of a single rigid line is calculated by using the generalized Peach-Koehler formula. Numerical examples show the shielding effects of field intensity factors and image force on the dislocation. The solution we present can be served as a Green’s function for investigating the micro-crack initiation mechanism at the tip of a rigid line. |
Keywords
rigid lines, dislocation, piezoelectric, field intensity
factors, force on dislocation
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Milestones
Received: 8 December 2005
Revised: 9 February 2006
Accepted: 16 July 2006
Published: 1 March 2007
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Authors |
| BingJin Chen | |
| School of Mechanical and Aerospace
Engineering Nanyang Technological University Nanyang Avenue Singapore 639798 |
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| DongWei Shu | |
| School of Mechanical and Aerospace
Engineering Nanyang Technological University Nanyang Avenue Singapore 639798 |
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| ZhongMin Xiao | |
| School of Mechanical and Aerospace
Engineering Nanyang Technological University Nanyang Avenue Singapore 639798 |
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