A yarn interaction model for circular braiding

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• 作者：J.H. van Ravenhorst¹ ; ^{j.h.vanravenhorst@braidsim.com" class="auth_mail" title="E-mail the corresponding author} ; ; R. Akkerman ; ^{r.akkerman@utwente.nl" class="auth_mail" title="E-mail the corresponding author}
• 关键词：C. Analytical modeling ; E. Automation ; E. Braiding ; A. Preform
• 刊名：Composites Part A: Applied Science and Manufacturing
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：81
• 期：Complete
• 页码：254-263
• 全文大小：2398 K

文摘

Machine control data for the automation of the circular braiding process has been generated using previously published mathematical models that neglect yarn interaction. This resulted in a significant deviation from the required braid angle at mandrel cross-sectional changes, likely caused by an incorrect convergence zone length, in turn caused by this neglect. Therefore the objective is to use a new model that includes the yarn interaction, assuming an axisymmetrical biaxial process with a cylindrical mandrel and Coulomb friction. Experimental validation with carbon yarns and a 144 carrier machine confirms a convergence zone length decrease of 25% with respect to a model without yarn interaction for the case analyzed, matching the model prediction using a coefficient of friction of around 0.3.