Interface behavior of a bi‐material plate under dynamic loading. Cohesive interface debonding
Interface behavior of a bi‐material plate under dynamic loading. Cohesive interface debonding
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动态加载下双材料板的界面行为内聚界面脱粘。
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
B. Gambin
中科院分区：
文献类型：
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作者：
J. Ivanova;G. Nikolova;W. Becker;B. Gambin
本文研究了动态时间谐波载荷下预裂双材料陶瓷-金属结构的弹性和内聚界面行为。应用剪力滞模型和傅里叶方法来查找所考虑的双材料结构的动态响应，假设粘性界面行为，伴随着弹性脆性界面行为。在这两种情况下，都不考虑脱粘长度的增长，例如在给定的负载条件下，只能找到相应的脱粘长度。双材料结构已经弹性脱粘部分的惯性力被忽略。提出了适当的接触条件，以便将弹性和内聚解决方案结合在一起。双材料结构内聚脱粘长度的数值预测是借助相同加载条件下弹性脱粘长度的相应值来计算的。讨论了载荷特性（即频率和振幅波动）对脱粘长度和界面剪切应力分布的影响。所获得结果的参数分析通过金属基材上的现代陶瓷金属复合材料的例子进行了说明，并如图所示。
The paper deals with the elastic and cohesive interface behavior of pre‐cracked bi‐material ceramic‐metal structures under dynamic time harmonic load. The shear lag model as well as the Fourier method is applied to find the dynamic response of the considered bi‐material structure, assuming the cohesive interface behaviour, accompanied before of the elastic‐brittle one. In both cases, the growth of debond length is not considered, e.g. at a given loading condition the only corresponding debond length is found. The inertia forces of the already elastic debond parts of the bi‐material structure are neglected. Appropriate contact conditions are proposed in order to fit together both elastic and cohesive solutions. The numerical predictions for the cohesive debond length of the bi‐material structures is calculated by the aid of the corresponding value of the elastic debond length at the same loading condition. The influence of loading characteristics i.e. frequencies and amplitude fluctuations on the debond length and the interface shear stress distribution is discussed. The parametric analysis of the results obtained is illustrated by examples of the modern ceramic‐metal composites on metal substrates and is depicted in figures.