Interface Opening

Of the six typical failure modes of a bolted joint, only one is the bolt being pulled apart. This article starts from how a bolted joint works and gives a checklist: which joints need the systematic VDI 2230 calculation, which can do with simplified preselection, and what the standard covers and does not cover.

Explains eccentric clamping and eccentric loading in VDI 2230: the two eccentricity parameters, the corrected resiliences, the load factor, the substitutional moment of inertia, and the clamp load needed to prevent opening.