In-plane fiber waviness is one of the defects that can occur from the stamp-forming process of thermoplastic composite (TPC) parts. The influence of this defect on the mechanical performance of multidirectional composites is not yet fully understood. The main challenge in determining the influence on mechanical properties lies in reproducing the waviness in test coupons that can subsequently be subjected to testing. This paper describes an experimental approach to reproduce representative in-plane waviness defects, specific for TPC, by reverse-forming of V-shape parts of various bend angles and inner radii. Characterization results show that this method enables the manufacturing of localized in-plane waviness in flat 24-ply quasi-isotropic C/PEEK composites with no voids. Furthermore, laminates having varying levels of maximum waviness angle (${\theta }_{\text{max}}$), between 14° to 64°, were successfully produced in this work. By comparing the ${\theta }_{\text{max}}$ value with the examples of industrial stamp-formed parts, it can be concluded that the developed coupon manufacturing method can reproduce waviness from TPC part production reasonably well. Finally, all of the produced laminates have defective region lengths smaller than 20 mm, localized within a predefined location which makes them well suited for standard compression test coupons.

面内纤维波纹是热塑性复合材料 (TPC) 部件冲压成型过程中可能出现的缺陷之一。这种缺陷对多向复合材料机械性能的影响尚不完全清楚。确定对机械性能的影响的主要挑战在于重现测试试样中的波纹度，然后可以进行测试。本文描述了一种实验方法，通过对各种弯曲角度和内半径的 V 形零件进行反向成型，来重现具有代表性的平面内波纹缺陷，特别是 TPC。表征结果表明，该方法能够在无空隙的扁平 24 层准各向同性 C/PEEK 复合材料中制造局部平面波纹。此外，层压板具有不同水平的最大波纹角（${\theta }_{\text{最大限度}}$)，在 14° 到 64° 之间，在这项工作中成功制作。通过比较${\theta }_{\text{最大限度}}$以工业冲压成型零件为例，可以得出结论，所开发的试片制造方法可以相当好地再现 TPC 零件生产中的波纹度。最后，所有生产的层压板都具有小于 20 毫米的缺陷区域长度，位于预定位置内，这使得它们非常适合标准压缩测试试样。