Mechanics of Advanced Materials and Structures ( IF 2.8 ) Pub Date : 2020-05-29 , DOI: 10.1080/15376494.2020.1769232 David Ranz 1 , Jesús Cuartero 2 , Luis Castejón 2 , Ramón Miralbes 1 , David Valladares 2
Abstract
This paper proposes an enhanced Cohesive Zone Model (CZM) for the prediction of delamination in curved beams of epoxy carbon laminates. This model improves the conventional CZM, taking into account the fiber-bridging phenomenon and the variation of the element size among the thickness in the curved zone. The advantages of the enhanced model are underlined when results obtained from the numerical simulations of a four-point-bending test in compliance with ASTM D6415 standard are compared with the corresponding experimental results. The prediction of the post-failure behavior obtained with this model is closer to that obtained experimentally than with the conventional model.
中文翻译:
用于预测碳/环氧树脂层压弯曲梁分层行为的增强内聚区模型
摘要
本文提出了一种增强的内聚区模型 (CZM),用于预测环氧碳层压板弯曲梁的分层。该模型改进了传统的CZM,考虑了纤维桥接现象和弯曲区域厚度中单元尺寸的变化。将符合 ASTM D6415 标准的四点弯曲试验的数值模拟结果与相应的实验结果进行比较,强调了增强模型的优势。与传统模型相比,该模型获得的故障后行为预测更接近于实验获得的预测。