Experimental data on carbon fibre reinforced polyamide-6 composite (CF60/PA-6) under longitudinal and transverse compression loading

To meet emission standards and increase vehicle performance, the automotive industry is pushed to the development of lightweight structures, incorporating carbon fibre reinforced plastics (CFRPs). This data set has been produced as part of research within the field of modelling and analysing the strain rate-dependent compressive behaviour of CFRP structures. An objective is, to contribute to the understanding of strain rate sensitivity in carbon fibre/polyamide composites under longitudinal and transverse compression. Mechanical properties such as compressive failure strength and strain, chord moduli, yield strength and strain are evaluated. The results of the compression tests show that the composite is strain rate-dependent. Compression strength and failure strain increases with 51.2% and 61.1% respectively for the longitudinally tested specimen over a testing speed range of 2 mm/min to 1m/s. Similarly, the yield stress of the transverse tested specimen increases by +114.5%. I. Materials and specimen preparation The material consists of a polyamide-6 (nylon) matrix system reinforced with carbon fibre, stated by the manufacturer to result in a composite with a fibre volume percentage of 49%. The material is commercially available under the brand name: BASF Ultratape B3WC12 UD02. An ultrasonic hand welding device is used to adhere the tapes to each other and form laminates of [0◦]16, from which coupons with specified sizes were manufactured. Precedently, the laminates went through a process of pre-consolidation by belt press, water jet cutting and final consolidation in a hot-press and compression mould at research institute Neue Materialien Bayreuth (NMB). The materials are conditioned prior to testing according to DIN EN ISO 1110. Also, a stochastic pattern grey-scale pattern was created on the specimen surface, acting as carrier fot the deformation information, as required to perform Digital Image Correlation (DIC). II. Experimental set-up Within the range of 2 mm/min to 1m/s, compression tests were performed using a servo-hydraulic testing machine of type Instron VHS 160. Load-displacement monitoring is performed using an 1-component Kistler load cell of type 9051A, located at the bottom of a self-developed compression fixture (Schmack et al. Compos. Struct. 2018, 189, 256-262). High-speed photography is performed using two Photron FASTCAM SA-X high speed cameras, with maximum frame rate set at 45000 fps. DIC software, ARAMIS from Gesellschaft für optische Messtechnik (GOM) and Photron Fastcam Viewer software are used to process the information gathered.为满足排放标准并提升车辆性能，汽车工业亟需推动轻量化结构的研发，其中碳纤维增强复合材料（carbon fibre reinforced plastics, CFRPs）得到广泛应用。本数据集源自针对碳纤维增强复合材料结构应变率相关压缩行为开展建模与分析的研究项目，旨在加深对碳纤维/聚酰胺复合材料在纵向与横向压缩下应变率敏感性的理解。研究对压缩破坏强度、应变、弦模量、屈服强度与应变等力学性能进行了评估。 压缩试验结果表明，该复合材料表现出显著的应变率相关性：在2 mm/min至1 m/s的试验速度范围内，纵向试样的压缩强度与破坏应变分别提升了51.2%与61.1%；同理，横向试样的屈服应力提升了114.5%。 I. 材料与试样制备 本试验所用材料为碳纤维增强聚酰胺6（尼龙）基体复合材料，制造商宣称其纤维体积占比为49%，该商用材料品牌为巴斯夫（BASF）Ultratape B3WC12 UD02。研究采用超声波手持焊接设备将预浸带逐层粘接，制备得到[0°]16层合板，随后从中加工出指定尺寸的试样。此前，层合板需经过带式预压预固结、水射流切割，随后在拜罗伊特新材料研究所（Neue Materialien Bayreuth, NMB）的热压与压缩模具中完成最终固结。试验前，试样需按照DIN EN ISO 1110标准进行状态调节。同时，为采集变形信息以开展数字图像相关（Digital Image Correlation, DIC）测试，研究人员在试样表面制备了随机灰度图案，用于承载变形信息。 II. 试验装置 在2 mm/min至1 m/s的速度范围内，试验采用型号为Instron VHS 160的伺服液压试验机完成压缩测试。载荷-位移监测通过型号为9051A的单分量Kistler测力传感器实现，该传感器安装于自主研发的压缩夹具底部（Schmack等人, Compos. Struct. 2018, 189, 256-262）。高速成像采用两台Photron FASTCAM SA-X高速相机，最大帧率设置为45000 fps。试验数据通过德国光学测量技术协会（Gesellschaft für optische Messtechnik, GOM）的ARAMIS数字图像相关软件以及Photron Fastcam Viewer软件进行处理。