Blog

Bolted joints slip under transverse load and separate under axial tension. This article explains both failure criteria, their mutual triggering, and six pr

Directly applying single-bolt results to multi-bolt flanges leads to large deviations. This article explains the four VDI 2230-2 corrections: eccentric cla

The actual tightened preload is always a distribution, not a fixed value. This article explains the tightening factor alpha_A, its four sources of dispersi

Many joint calculation errors come from adding the full external load to preload. This article explains the correct stiffness-distributed relationship Fmax

The same bolt at the same torque can behave very differently on different materials. This article explains how clamped-part stiffness governs the load dist

A bolted joint lives or dies by its preload. This article gives a four-step quantitative method — target preload from yield strength and functional limits,

A bolted joint may look simple, but it is often the critical link in overall machine reliability. Starting from VDI 2230-1:2015, this article breaks down p