衝撃波管を用いた爆風負荷によるフロートガラスの応力発生

概要

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In order to study a glass plate strength against loading by explosion, stress generation of 300 mm × 300 mm × 19 mm float glass by blast wave loading was investigated by using a vertical square shock tube. Blast wave was produced by a vertical shock tube with an improved high-pressure chamber by inserting a cone-shaped material. Stress generation after maximum value upon blast wave was dependent on the decay pattern of blast wave loading. Stress generation σ(t, d^*) at time t and normalized non-dimensional thickness d* by blast wave loading can be shown as using as a function of time t, various parameters: dynamic coefficient, C_d, static coefficient, C_b, two factors ω and A dependent on glass thickness, decay constant A and positive time of blast wave t_p: σ(t, d^*)=C_d sin ωt・exp{-λ(t-π/2ω)}+C_b{1-(t-π/2ω)/t_p}・exp{-A(t-π/2ω)/t_p}with an additional decay term to blast wave equation due to shock tube loading. Further, it is suggested that shock wave loading and blast wave loading have almost similar influence on failure of glass.
社団法人日本セラミックス協会の論文
2004-04-01