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Title: Fracture mechanics of piezoelectric materials
Author: Wang ZQ(王自强); Han XL(韩学礼)
Source: International Journal of Fracture
Issued Date: 1999
Volume: 98, Issue:1, Pages:15-35
Abstract: This paper presents an analysis of crack problems in homogeneous piezoelectrics or on the interfaces between two dissimilar piezoelectric materials based on the continuity of normal electric displacement and electric potential across the crack faces. The explicit analytic solutions are obtained for a single crack in an infinite piezoelectric or on the interface of piezoelectric bimaterials. For homogeneous materials it is found that the normal electric displacement D-2, induced by the crack, is constant along the crack faces which depends only on the remote applied stress fields. Within the crack slit, the perturbed electric fields induced by the crack are also constant and not affected by the applied electric displacement fields. For bimaterials, generally speaking, an interface crack exhibits oscillatory behavior and the normal electric displacement D-2 is a complex function along the crack faces. However, for bimaterials, having certain symmetry, in which an interface crack displays no oscillatory behavior, it is observed that the normal electric displacement D-2 is also constant along the crack faces and the electric field E-2 has the singularity ahead of the crack tip and has a jump across the interface. Energy release rates are established for homogeneous materials and bimaterials having certain symmetry. Both the crack front parallel to the poling axis and perpendicular to the poling axis are discussed. It is revealed that the energy release rates are always positive for stable materials and the applied electric displacements have no contribution to the energy release rates.
Language: 英语
Indexed Type: SCI
Corresponding Author: Wang, TC (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China.
DOI: 10.1023/A:1018656606554
DOC Type: Article
WOS Subject: Materials Science, Multidisciplinary ; Mechanics
WOS Subject Extended: Materials Science ; Mechanics
WOS Keyword Plus: ELLIPTIC CRACK ; CERAMICS ; SOLIDS ; TIP
WOS ID: WOS:000083192600004
ISSN: 0376-9429
Subject: 力学
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/15805
Appears in Collections:力学所知识产出(1956-2008)_期刊论文

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