ねじ締結部への応力波の伝ぱにおける応力波のモードと締付けおよび緩みの関係

概要

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When a bar falling or moving at any speed strikes the opposite side of threaded rod fastening a thick circular disk, stress wave propagating from the collision interface is transmitted into the assembly system, tightening the thick circular disk by the bolt-nut unit. This paper experimentally studies the relationship between the loosening response of bolt-nut fastening assembly system and stress wave modes (tension or compression) along the direction of propagation. The technique of observing the loosening of a bolt-nut assembly system by monitoring the configuration of stress waves reflected from the surface of a thick circular disk is presented. The axial stress of a bolt tightened by a hexagonal nut in conjunction with a plain washer, a spring washer or a flanged nut is measured, when a number of incident waves are impinged into the assembly system. The shift of axial stress due to tightening by flanged nut is the smallest.
一般社団法人日本機械学会の論文
1995-06-25