Fiber-reinforced composite material and sandwich structure
A fiber-reinforced, composite material technology, applied in the field of fiber-reinforced composite materials, can solve problems such as the decline of mechanical properties
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Embodiment 1
[0119] As the reinforcing fiber base material (B'), the carbon fiber nonwoven fabric produced in the above-mentioned manner is prepared to be folded into a Figure 9 The weight per unit area obtained from the cross-sectional structure shown is 100 g / cm 2 folded substrate. At this time, when the prepreg is produced, in the pair of folds 8 adjacent to the reinforcing fiber base material (B'), the linear distance (Lr) between the adjacent pair of folds is 0 mm, that is, in contact with each other. Folding was performed so that the distance (Lf) connecting the adjacent pair of folds along the carbon fiber nonwoven fabric would be 10 mm. In addition, it folded so that the composition ratio 9 of a pair of folds that were close when the front and back surfaces of the folded base material were viewed together became a symmetrical structure. That is, it folds so that the adjacent pair of folds on the other surface are arranged in the middle of the adjacent pair of folds and the adjac...
Embodiment 2
[0122] As the reinforcing fiber base material (B'), except that the configuration of the folded base material was changed so that Lr was 1 mm and Lf was 9 mm, processing was carried out in the same manner as in Example 1 to obtain a prepreg and a fiber-reinforced composite material. . The resulting fiber-reinforced composite material has figure 1 The shown cross section surrounded by the three sides by the porous structure is a substantially triangular opening. The openings of the coarse cavity are aligned in the in-plane direction. The evaluation results are shown in Table 1.
Embodiment 3
[0124] As the reinforcing fiber base material (B'), except that the configuration of the folded base material was changed so that Lr was 2 mm and Lf was 8 mm, processing was carried out in the same manner as in Example 1 to obtain a prepreg and a fiber-reinforced composite material. . The resulting fiber-reinforced composite material has figure 1 The shown cross section surrounded by the three sides by the porous structure is a substantially triangular opening. The openings of the coarse cavity are aligned in the in-plane direction. The evaluation results are shown in Table 1.
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Abstract
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