Dynamics of cracked composite material structures
Dynamics of cracked composite material structures
复制标题
复合材料裂纹结构的动力学
DOI：
10.1007/s004660050220
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
A. Żak
中科院分区：
文献类型：
--
作者：
M. Krawczuk;W. Ostachowicz;A. Żak
作为这项工作的结果，建立了有限裂纹梁单元、分层梁单元以及分层板单元的模型。利用这些模型分析了疲劳裂纹和脱层对单向复合材料结构动力特性的影响。文中提出的裂纹和脱层的建模方法可以根据具体的损伤情况(如斜裂纹、双边裂纹、内部裂纹、多层脱层等)进行修正，其数值计算结果与已知的损伤参数如：裂纹的位置和深度或脱层的长度和位置对固有频率的影响是一致的。同时，观察到了材料参数对这些变化的强烈影响，这在各向同性材料中是不存在的。
As the result of this work models of the finite cracked beam element, delaminated beam element, and also delaminated plate element have been developed. These models have been used for the analysis of the influence of the fatigue cracks and delaminations on the dynamic characteristics of the constructions made of unidirectional composite materials. The method of modelling cracks and delaminations presented in this work enables its easy modification according to specific cases of damage (i.e. oblique crack, two-side crack, inside crack, multiple delaminations etc.).The results obtained from numerical calculations of the presented models are in good agreement with the known influence of damage parameters like: the position and the depth of the crack or the length and the position of the delamination on the natural frequencies. Simultaneously, a strong influence of the material parameters on these changes has been observed, which does not exist in the case of isotropic materials.