単一衝撃に対する網系の強さ

概要

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To investigate the strength of the netting twines (see Table 1) against a single blow, the present study was carried out using the apparatus as shown in Figure 1. In such impact tests, an impulsive force is usually applied to the netting twine horizontally. However for this experiment, the implusive force was applied to the netting twine vertically using several cutting steel-pieces (Figure 2 and Table 2). Various observed and calculated values are indicated in Table 3. Irrespective of the magnitude of the exerted impulsive force, the test-piece needed a constant energy necessary for the fracture (Fig. 4), but the required energy varied only in the test-piece lengths (Fig. 5). It seems that the stronger and unexpandable the netting twine is, the more energy is needed for fracture (Table 4 and Fig. 6).
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