Seward Oscar, Cepero-Mejías Fernando, Fairclough J Patrick A, Kerrigan Kevin
AMRC with Boeing, Advanced Manufacturing Park, Wallis Way, Catcliff, Rotherham S60 5TZ, UK.
Industrial Doctorate Centre in Machining Science, The University of Sheffield, Sir Frederick Mappin Building, Mappin Street, Sheffield S1 3JD, UK.
Polymers (Basel). 2022 Feb 22;14(5):847. doi: 10.3390/polym14050847.
Constant coefficients of friction (COFs) are currently used in the literature to describe the contact mechanics between tool and workpiece for finite element (FE) machining simulation of carbon fibre-reinforced polymers (CFRPs). However, these are solely based on closed-loop tribology experimentation, which insufficiently represent machining conditions. To overcome this gap in the knowledge, this work proposes a novel experimental open-loop tribological testing method to produce a dynamic FE friction model for CFRP machining simulations. The newly proposed dynamic friction model is based on a function of fibre angle, contact pressure and slip rate, and it has been validated to both experimental results and constant COF FE simulations. The main aim of this article is to create a link between machining, tribology and FE simulation, by implementing cutting-edge tribological testing that results in highly accurate FE simulations. This dynamic model has been shown to improve the accuracy of open-loop tribological simulations, giving confidence in future implantation in CFRP machining simulations.
目前，文献中使用恒定摩擦系数（COF）来描述碳纤维增强聚合物（CFRP）有限元（FE）加工模拟中刀具与工件之间的接触力学。然而，这些系数仅基于闭环摩擦学实验，不足以代表加工条件。为了弥补这一知识空白，本文提出了一种新颖的实验性开环摩擦学测试方法，以生成用于CFRP加工模拟的动态有限元摩擦模型。新提出的动态摩擦模型基于纤维角度、接触压力和滑移率的函数，并且已经通过实验结果和恒定COF有限元模拟进行了验证。本文的主要目的是通过实施前沿的摩擦学测试，在加工、摩擦学和有限元模拟之间建立联系，从而实现高度精确的有限元模拟。已证明该动态模型提高了开环摩擦学模拟的准确性，为未来在CFRP加工模拟中的应用提供了信心。
