Kheradpisheh Meisam, Yas Amir Hafez, Hojjati Mehdi
Department of Mechanical, Industrial and Aerospace Engineering, Concordia Center for Composites (CONCOM), Montreal, QC, Canada.
J Compos Mater. 2025 May;59(12):1477-1491. doi: 10.1177/00219983241313280. Epub 2025 Jan 11.
The effects of automated fiber placement (AFP) parameters on the inter-laminar bonding between the uncured thermoset prepreg tapes were investigated using a systematic series of experiments and FE analysis. The goal was to optimize inter-laminar bonding during the AFP lay-up process and provide a model for the interlayer bonding of uncured prepreg tapes during this process. The shear strength of the interfacial bonding plays a pivotal role in the formation of planar and non-planar deformations during the automated fiber placement (AFP) process. The quality of this bonding has a significant effect on the quality of the manufactured parts. Besides, the bonding strength is interconnected with various AFP process parameters including compaction roller, feed rate, temperature, and dwell time. Hence, a systematic series of experimental studies are conducted to investigate how changes in process parameters affect the shear strength of single lap joint (SLJ) specimens produced under various process conditions. To fabricate the single-lap joint samples under different conditions, an in-house setup was developed to simulate the AFP process allowing us to control compaction force, feed rate, temperature, and dwell time during the process. The experimental results of the single lap joints indicate that the shear strength of the bonded prepreg tows is significantly influenced by the interaction among the process parameters rather than by their individual, isolated effects. Moreover, the responses of prepreg SLJs are simulated using the FE method. Through the comparison of numerical and experimental results, it will be clearly shown that the developed FE framework can act as a reliable approach for modeling the bonding layer between prepreg tapes.
采用一系列系统的实验和有限元分析，研究了自动铺丝（AFP）参数对未固化热固性预浸带材层间粘结的影响。目标是在AFP铺层过程中优化层间粘结，并为该过程中未固化预浸带材的层间粘结提供一个模型。界面粘结的剪切强度在自动铺丝（AFP）过程中平面和非平面变形的形成中起着关键作用。这种粘结质量对制造部件的质量有重大影响。此外，粘结强度与各种AFP工艺参数相互关联，包括压实辊、进给速度、温度和保压时间。因此，进行了一系列系统的实验研究，以探究工艺参数的变化如何影响在各种工艺条件下生产的单搭接接头（SLJ）试样的剪切强度。为了在不同条件下制造单搭接接头样品，开发了一种内部装置来模拟AFP过程，使我们能够在过程中控制压实力、进给速度、温度和保压时间。单搭接接头的实验结果表明，粘结预浸丝束的剪切强度受工艺参数之间的相互作用影响显著，而非单个参数的孤立作用。此外，使用有限元方法模拟了预浸料单搭接接头的响应。通过数值结果与实验结果的比较，将清楚地表明所开发的有限元框架可作为一种可靠的方法来模拟预浸带材之间的粘结层。
