1408 複合材料のSH波伝ぱ挙動に及ぼす繊維配置不規則性の影響(S18-2 複合材料,S18 不規則性,不均一性構造・材料の数理モデルとその応用)

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The influence of the disordered fiber arrangement on the SH wave propagation behavior in a fiber-reinforced composite material is investigated based on the computational analysis of the multiple wave scattering. The frequency-dependent transmission characteristics of the SH wave through the fiber-reinforced region are analyzed for a square arrangement, perturbed square arrangements and a random arrangement of the fibers. The results reveal that the fiber arrangement exhibits remarkable effects on the transmission characteristics. Namely, the cut-off feature in the stop band for the square arrangement tends to vanish as the fiber arrangement is perturbed toward randomness. In the random composite, the transmission ratio decreases with the frequency as the outcome of the significant wave scattering by each fiber.
2005-09-18