Compression properties of z-pinned carbon-fibre/epoxy laminates reinforced with circumferentially notched z-pins
Compression properties of z-pinned carbon-fibre/epoxy laminates reinforced with circumferentially notched z-pins
复制标题
DOI：
10.1016/j.compscitech.2020.108486
复制
发表时间：
2021-01
影响因子：
9.1
通讯作者：
A. Knopp;G. Scharr
中科院分区：
文献类型：
--
作者：
A. Knopp;G. Scharr
本文介绍了单向碳纤维/环氧树脂层压板的面内压缩性能的研究结果，该层压板具有周向缺口 z 销的三维 z 销增强材料。检查了不同的缺口设计（矩形、圆形、三角形和正弦曲线），以确定对最终压缩强度和模量的影响。从测定中可以得出结论，无论缺口设计如何，z 形销的缺口对压缩强度都有显着影响。由于在 z 销表面上实施凹口导致微观结构发生变化，例如部分降低面内纤维波纹度以及减少溶胀行为，因此与使用无凹口销增强的层压板相比，压缩强度值显着更高。随着缺口深度的增加和缺口距离的减小，抗压强度值不断上升。相比之下，z 形钉扎层压板的杨氏模量不受 z 形销切口的影响。在进行的调查中没有发现切口设计、圆周切口的深度和距离对杨氏模量的影响。
This paper represents results of the investigations on in-plane compression properties of unidirectional carbon-fibre/epoxy laminates with a three-dimensional z-pin reinforcement with circumferentially notched z-pins. Different notch designs - rectangular, circular, triangular and sinusoidal - were examined to identify the impact on the resulting compression strength and modulus. From the determinations it can be concluded that notching of z-pins has a significant impact on the compression strength, no matter of the notch design. Due to the changes in microstructure caused by the implementation of notches at the z-pin surface, eg partially lower in-plane fibre waviness as well as reduced swelling behaviour, the compression strength values are significantly higher compared to those of laminates reinforced with unnotched pins. With increasing notch depth and decreasing notch distances the compression strength values are rising. In contrast, the Young's modulus of the z-pinned laminate is not affected by notching of the z-pins. An influence of the notch design, depth and distance of circumferential notches on the Young's modulus was not found with the investigation carried out.