A nodal-based extrinsic cohesive/contact model for interfacial debonding analyses in composite structures
A nodal-based extrinsic cohesive/contact model for interfacial debonding analyses in composite structures
复制标题
用于复合结构中界面脱粘分析的基于节点的外聚内聚/接触模型
DOI：
10.1016/j.compstruc.2019.02.001
复制
发表时间：
2019-04-15
影响因子：
4.7
通讯作者：
Yoshimura, Shinobu
中科院分区：
文献类型：
--
作者：
Chen, Shunhua;Mitsume, Naoto;Yoshimura, Shinobu
界面脱粘是复合材料结构的主要失效形式之一。在这项工作中，提出了一个节点为基础的非本征凝聚力/接触模型的有效和准确的剥离分析的目的。一方面，与常用的内聚区模型不同，该模型中的有限元节点随着脱粘的进行沿着在需要时自适应地复制，从而节省了计算成本。另一方面，断裂准则，这是直接在节点上执行，提出了保证节点力是连续的节点复制前后。在这样做时，新的模型是能够解决所谓的时间连续性问题存在于传统的外在模型在一个有效的方式。此外，一个简单而有效的检测技术的开发，以促进自适应节点复制。开发的凝聚力区模型，然后再加上一个支流节点到段接触算法，以实现从内聚失效接触滑动的平稳过渡。数值算例验证了模型的有效性和实用性。(C)2019爱思唯尔有限公司版权所有。
Interfacial debonding is one of the major failure patterns in composite structures. In this work, a nodal based extrinsic cohesive/contact model is proposed for the purpose of efficient and accurate debonding analyses. On one hand, unlike the commonly used intrinsic cohesive zone model, finite element nodes in the proposed model are adaptively duplicated when and where needed along with the advance of debonding, and thus to save computational cost. On the other hand, a fracture criterion, which is performed directly at nodes, is proposed to guarantee nodal forces to be continuous before and after nodal duplication. In doing so, the new model is capable of addressing the so-called time continuity problem existing in the conventional extrinsic model in an efficient way. In addition, a simple but efficient detection technique is developed to facilitate adaptive nodal duplication. The developed cohesive zone model is then coupled with a tributary node-to-segment contact algorithm to achieve a smooth transition from cohesive failure to contact sliding. Several numerical examples are performed to validate the efficiency and effectiveness of the proposed model. (C) 2019 Elsevier Ltd. All rights reserved.