In this study, the effect of rapid laser heating, which is typical during laser-assisted fiber placement (LAFP), on the micro- and meso- structure of the thermoplastic tape was investigated. Thermoplastic tapes were heated above the melting temperature with different heated lengths (30 and 80 mm and heating times (0.2 and 0.8 s) in a dedicated experimental setup. In-situ and ex-situ characterization techniques were used to observe the differences between the micro- and meso- structure of the tape before and after heating. The experiments resulted in significant changes in the tape structure, namely increased out-of-plane deformation, waviness, arc-length width, roughness, thickness and volumetric void content. This study shows for the first time that a unique deconsolidation behavior takes place during the heating phase of LAFP: the deconsolidation mechanisms are exacerbated by the non-uniform temperature at the tape surface, which is caused by roughness increase and waviness formation.

在这项研究中，研究了激光辅助纤维铺放 (LAFP) 过程中常见的快速激光加热对热塑性胶带的微观和细观结构的影响。在专用的实验装置中，使用不同的加热长度（30 和 80 毫米和加热时间（0.2 和 0.8 秒））将热塑性胶带加热到熔化温度以上。使用原位和非原位表征技术来观察微观结构之间的差异。 - 和加热前后胶带的细观结构。实验导致胶带结构发生显着变化，即增加面外变形、波纹度、弧长宽度、粗糙度、厚度和体积空隙含量。本研究首次表明在 LAFP 的加热阶段发生了独特的解固作用：