Transient response of an interfacial crack between dissimilar magnetoelectroelastic layers under magnetoelectromechanical impact loadings: Mode-I problem
Transient response of an interfacial crack between dissimilar magnetoelectroelastic layers under magnetoelectromechanical impact loadings: Mode-I problem
复制标题
磁机电冲击载荷下不同磁电弹性层之间界面裂纹的瞬态响应：I 型问题
DOI：
10.1016/j.ijsolstr.2009.05.003
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发表时间：
2009-09
影响因子：
3.6
通讯作者：
Feng, W.J.
中科院分区：
文献类型：
--
作者：
Li, Y.S.;Xu, Z.H.;Feng, W.J.
研究了磁、电和机械冲击载荷下两个不同磁电弹性层之间界面裂纹的动态响应。提出了四种理想裂纹面假设，分别采用磁电不可渗透（情况1）、磁电不可渗透且电可渗透（情况2）、磁电可渗透且电不可渗透（情况3）和磁电可渗透（情况4）。导出了动态场强因子和能量释放率。根据能量释放率准则，分析了荷载组合和裂纹形态对结构动力响应的影响，特别是荷载组合对裂纹形态的影响。数值结果表明，除其他外，负的磁（或电）负载一般倾向于抑制裂纹的扩展，而不是一个积极的磁（或电）不可渗透的界面裂纹。所得结果对多层电磁弹性结构的设计具有潜在的应用价值。
The dynamic response of an interfacial crack between two dissimilar magnetoelectroelastic layers is investigated under magnetic, electrical and mechanical impact loadings. Four kinds of ideal crack-face assumptions, i.e., magnetoelectrically impermeable (Case 1), magnetically impermeable and electrically permeable (Case 2), magnetically permeable and electrically impermeable (Case 3) and magnetoelectrically permeable (Case 4), are adopted separately. The dynamic field intensity factors and energy release rates are derived. The effects of loading combinations and crack configurations especially for the former on the dynamic response are examined according to energy release rate criterion. The numerical results show that, among others, a negative magnetic (or electrical) loading is generally prone to inhibit the crack extension rather than a positive one for a magnetically (or electrically) impermeable interfacial crack. Results presented in this paper should have potential applications to the design of multilayered magnetoelectroelastic structures.
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