Numerical Simulation for Predicting Fatigue Damage Progress in Notched CFRP Laminates by Using Cohesive Elements
Numerical Simulation for Predicting Fatigue Damage Progress in Notched CFRP Laminates by Using Cohesive Elements
复制标题
使用粘性单元预测缺口 CFRP 层压板疲劳损伤进展的数值模拟
DOI：
10.1299/jmmp.3.1202
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
S. Yashiro
中科院分区：
文献类型：
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作者：
T. Okabe;S. Yashiro
提出了碳纤维增强复合材料(CFRP)缺口正交层合板疲劳损伤扩展的内聚区模型。在该模型中，粘结单元在循环载荷作用下断裂过程中的损伤扩展用传统的损伤力学模型来描述。初步探讨了该模型是否能较好地描述各向同性固体材料中圆形裂纹的疲劳损伤扩展。研究表明，通过调整参数，该模型可以再现已有的断裂力学模型加巴黎定律的结果。然后，我们数值研究了在拉伸循环载荷作用下缺口碳纤维复合材料层合板的损伤过程，并将预测的损伤模式与Speering等人报道的实验结果进行了比较。(Compos.SCI。泰克诺。(1992年)。预测的损伤模式与实验结果一致，显示出缺口附近多种类型的损伤(如劈裂、横向裂纹和分层)的扩展。
This study proposes the cohesive zone model (CZM) for predicting fatigue damage growth in notched carbon-fiber-reinforced composite plastic (CFRP) cross-ply laminates. In this model, damage growth in the fracture process of cohesive elements due to cyclic loading is represented by the conventional damage mechanics model. We preliminarily investigated whether this model can appropriately express fatigue damage growth for a circular crack embedded in isotropic solid material. This investigation demonstrated that this model could reproduce the results with the well-established fracture mechanics model plus the Paris' law by tuning adjustable parameters. We then numerically investigated the damage process in notched CFRP cross-ply laminates under tensile cyclic loading and compared the predicted damage patterns with those in experiments reported by Spearing et al. (Compos. Sci. Technol. 1992). The predicted damage patterns agreed with the experiment results, which exhibited the extension of multiple types of damage (e.g., splits, transverse cracks and delaminations) near the notches.