Novel tape termination method for automated fibre placement: Cutting characteristics and delamination suppression
Novel tape termination method for automated fibre placement: Cutting characteristics and delamination suppression
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DOI：
10.1016/j.compositesa.2020.106023
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发表时间：
2020-10
影响因子：
8.7
通讯作者：
Tharan Gordon;Xiaodong Xu;M. Wisnom;B. Kim
中科院分区：
文献类型：
--
作者：
Tharan Gordon;Xiaodong Xu;M. Wisnom;B. Kim
提出了一种新的胶带端接方法，用于在锥形复合材料中使铺层端部变细，并消除由于铺层掉落而导致的纤维不连续。对这一过程所需的力--称为胶带刮刀--进行了实验研究，考察了刀片速度、刮刀比率、胶带厚度和宽度。对具有两种不同纵横比的单向层合板试件进行了拉伸试验，考察了剪切率对试件分层行为的影响。结果表明，铺层划痕率是控制锥形试件切削力和分层行为的关键参数，当达到一定的阈值时，分层可以被完全抑制。该方法具有在商用AFP机上实现的潜力，理论上实现了更紧凑的切割机构，具有防止铺层下落区域分层的能力。
A novel tape termination method for tapering the ply end and removing the fibre discontinuity owing to a dropped ply in a tapered composite was demonstrated. The forces required for this process – referred to as tape scarfing – were experimentally investigated with respect to blade speed, scarfing ratio, tape thickness and width. Tensile tests were conducted on unidirectional laminate specimens with a scarfed ply at two different aspect ratios to examine the effect of scarfing ratio on the delamination behaviour of the specimens. The results showed that the ply scarfing ratio is a critical parameter controlling the cutting force and delamination behaviour in a tapered specimen, and upon reaching a certain threshold delamination can be completely suppressed. The method demonstrated has potential for implementation in commercial AFP machines, theoretically realising a more compact cutting mechanism, with the capability of preventing delamination in the ply drop regions.