薄板の貫通破壊に関する研究　Ｉ　　準静的貫通破壊時の薄板の吸収エネルギー

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  • Study on penetration of ductile thin metal sheet. 1st report Total work done for thin metal sheet during quasi-static penetration by conical punch.
  • ウスイタ ノ カンツウ ハカイ ニ カンスル ケンキュウ 1 ジュン セイテキ

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This report studies the penetration of ductile thin metal sheet by conical bunches and tries to estimate the total work done which is absorbed during penetration. The penetration tests on circular thin sheets of mild steel, whose thicknesses are 1.0, 2.1 and 3.1mm 200mm diameter, are carried out at a quasistatical punch speed by using conical punches. The punch angles are 30, 45, 60 and 90 degrees and the point diameters of punch are 5.5 and 20mm. The total work done and the effect of plate thickness, punch angle and point diameter on the failure mode of plate and investigated experimentally. In addition, the authors present a formula for estimation of total work done for ductile thin metal sheets during penetration. By comparing estimated values with experimental ones of total work done, it is clear that the formula proposed by authors is valid for the estimation of total work done except by a large punch angle.

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