電磁軟鉄棒の凸状端変形挙動と発生衝撃力

概要

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In designing machine parts or structures which should withstand an impact load, it is fundamentally important to know the dynamic deformation of the materials at its contact part and the impulsive force generated at that part. The deformed shape at the contact part and the generated impulsive force have been measured when a Soft Magnetic Iron bar collides axially, perpendicularly against a devised sensing plate. It was found that a new truncated cone was formed at the contact end and that the conical angle of the cone depended only on the conical angle of the former cone before the collision. It was also confirmed that the generated mean stress on the boundary plane between the deformed part and the undeformed part at the impact end was constant. By comparing experimental results with calculated results using the theoretical relation proposed in previous paper, the effectiveness of the theoretical relation for estimating the impulsive force for Soft Magnetic Iron Bars is confirmed.
1993-03-25