The current study focuses on the bearing failure process of NCF composites and associated damage mechanisms. A set of experiments on bolted joints between NCF composite and steel plates have been performed. The bearing damage onset and failure progression in the composite was monitored at different load levels by microscopic image analysis. Fibre kinking in 0° layers was found as the key damage mechanism that initiates and drive the bearing failure. Matrix cracking and delaminations were found present as well. A cost-effective FE model that predicts bolt bearing failure of NCF composites was proposed. The model utilises state-of-the-art failure criteria and predicts both intra- and inter-laminar progressive damage. A good correlation between the predicted damage development process and experiments was observed both in terms of failure modes and load levels.

当前的研究集中在NCF复合材料的轴承破坏过程及相关的损伤机理上。对NCF复合材料和钢板之间的螺栓连接进行了一组实验。通过显微图像分析在不同的载荷水平下监测复合材料中的轴承损坏开始和破坏进程。发现0°层中的纤维扭结是引发和驱动轴承故障的关键损坏机制。还发现基体开裂和分层。提出了一种经济有效的有限元模型，用于预测NCF复合材料的螺栓轴承失效。该模型利用最新的失效标准，并预测层内和层间渐进性损伤。