On the evolution of the distribution of entrapped air at the tool/first ply interf‘ace during lay-up and debulk
On the evolution of the distribution of entrapped air at the tool/first ply interf‘ace during lay-up and debulk
复制标题
铺层和压实过程中工具/第一层界面处截留空气分布的演变
DOI：
10.1179/2055035914y.0000000005
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
K. Potter
中科院分区：
文献类型：
--
作者：
L. Bloom;M. Napper;C. Ward;K. Potter
摘要在预浸料铺层的材料沉积阶段，空气会导致固化层压板中的空隙率，这是决定所得层压板和部件质量的主要因素。因此，去除这些夹带的空气是实现最大部件性能的优先事项。迄今为止，似乎还没有任何一致的研究过程中，空隙可以被截留。本文试图解决这个问题，提出直接观察之间的接触玻璃工具表面和第一层的碳纤维预浸料铺设到it.The工具和层之间的空气的截留进行了研究，在其分布和演变过程中，在真空下，在室温下的体积。观察到初始接触面积与最终截留空气水平之间存在违反直觉的反比关系，初始接触水平越高，最终截留空气水平越高。还进行了初步的检查，以审查层终端和装袋的做法对空气截留的影响。
Abstract Air entrapped during the material deposition stage of prepreg layup can contribute to voidage in the cured laminate, which is a major factor in determining the quality of the resulting laminates and components. Removal of this entrapped air is therefore a priority to achieve maximum part performance. To date, there does not appear to have been any consistent study of the processes by which voids can be entrapped. This paper seeks to address this by presenting direct observations of the contact between a glass tool surface and the first ply of carbon fiber prepreg laid down onto it. The entrapment of air between the tool and ply is investigated, in terms of its distribution and evolution during debulk under vacuum at room temperature. A counterintuitive inverse relationship between initial area of contact and the final level of entrapped air was observed, with higher levels of initial contact leading to higher final levels of entrapped air. An initial examination was also carried out to review the effects of ply terminations and bagging practices on air entrapment.