Load-displacement experimental data from axial tensile loading of CFRP-SPCC hybrid laminates

The current paper shows a data set of load-displacement output from axial tensile loading of CFRP-SPCC hybrid laminates. The specimen geometries are cut based on standard procedure from ASTM D-3039. At least 3 positions in each specimen, we measured its width and thickness. Data of the load and displacement were repeated at least 3 samples in each combination of hybrid laminates. Tensile test was conducted with a 1 mm/min of loading rate. The data were recorded from unloading until failure of specimens. The data gives information about the highest load and the behavior of load-displacement in axial tensile loading. By using width and thickness, normalized data can be obtained, the load can be calculated into stress (MPa) unit. The data are useful for researchers and structural engineers that deals with CFRP, SPCC, and hybrid CFRP-SPCC laminates.


Data description
Comprehensive raw data of load-displacement values are available in the appendix. The data consist of specimens with several CFRPs and SPCCs can be seen in Table 1. Detailed dimension of all specimens can be seen in Table 2. Load-displacement of SPCC plate is shown in Fig. 1 Value of the Data The data presented in the current study provide a complete material performance during axial tensile loading of CFRP laminates and hybrid laminates. The data can be used by designers, engineers, and scientists to predict the material strength, and maximum load of CFRP, SPCC, and CFRP-SPCC hybrid laminates. The data of CFRP-SPCC hybrid laminate can be used in several fields such as structural applications (buildings, bridges, towers) and automotive industries.
Since load-displacement is raw data, data processing can be done with different purposes to obtain material strength, stiffness, and ABD matrixes of hybrid laminates.   laminates with sequences of [0] 4 can be seen in Fig. 2. Furthermore, for [0] 2 CFRP laminate, loaddisplacement curves are illustrated in Fig. 3.

Specimen preparation and test
The steel used in the research is called Steel Plate Cold Commercial (SPCC), or equivalent to JIS G 3141 with 0.8 mm of thickness. SPCC commonly used in structures applications and automobile parts [1]. Prepreg CFRP T800 from Toray Industries Inc. were manufactured alongside with SPCC directly by using hand lay-up technique. Curing process were used hot press machine with 130 C for 3 h in room temperature condition (25 C) to ensure all resin completely cured. The specimen then cut based on ASTM D3039 by using cutting machine. Fig. 13 show materials used in the study, hot press machine for curing process, and cutting machine to cut the specimens.
The steel used in this research is called Steel Plate Cold Commercial (SPCC), or equivalent to JIS G 3141 with 0.8 mm of thickness. SPCC is commonly used in structures applications and automobile parts [1]. Prepreg CFRP T800 from Toray Industries, Inc. were manufactured alongside with SPCC directly by using hand lay-up technique. Curing process was done by using hot-press machine with 130 C for 3 h to ensure all resin completely cured. After curing, cutting process, sample preparations and testing were done in the room temperature (25 C). The specimens were then cut based on ASTM D3039 by using cutting machine. Fig. 13 show materials used in the study, hot press machine for curing process, and cutting machine to cut the specimens.  Before testing specimens, they were attached to 0.5 mm of aluminium tab with 40e50 mm length at both ends. The detailed specimen's dimension can be seen in Fig. 14 where t is the specimen thickness (mm), w is specimen width (mm), c is tab length (45 mm), l is total specimen length (200 mm). Data of specimen thickness and width are shown in Table 2. At least 3 different positions were required to measure specimen thickness and width. The detailed measurement method is illustrated in Fig. 15.  Tensile test was conducted by using an Instron servo-hydraulic Universal Testing Machine (UTM) 8802. During tensile loading, load-displacement were recorded automatically until the failure of specimens. To investigate the condition of side surface of laminates during tensile loading, a Dino-Lite optical microscope was used. Detailed experimental setup is shown in Fig. 16.

Note from the experiment
To increase the bonding strength between CFRP and SPCC, sandpaper P120 can be used to increase SPCC surface roughness.  After sandpaper applied, ethanol was used with a clean tissue to remove all debris and SPCC tiny residual object from the SPCC surface. Make sure to clean all the surface and remove all the pollutants.     To avoid pollutant attached on the material surface and hands, lab gloves can be used. Placed specimen in the hot press machine before the machine is started. Use heat resistance gloves to remove the specimen from hot press machine. Do not directly cut the sample while the sample is not properly cool and still in cooling process. At least wait 4 h to make sure the sample is properly cured and cool. Carefully to use cutting machine. Make sure to use gloves and lab glasses to protect the eyes. Keep distance during tensile loading is in progress since the delamination of CFRP may cause injury since it usually forms as sharp debris.
process. Authors also thank Siwat Manomaisantiphap for reviewing manuscript and AUN SEED NET JICA scholarship for the funding.