This step checks whether the bolt withstands the combination of tensile stress from preload and torsional stress from tightening without exceeding the yield point. The maximum permissible preload (FMzul) is determined, typically at 90% utilization of the minimum yield point, representing an appropriate design margin while still enabling efficient material usage.
A comprehensive "VDI 2230" feature should automate the following logic from the latest release: Calculation of Bolted Joints VDI 2230 | Bossard Group vdi 2230 2021
Verify that the combined stresses (tensile stress from preload plus torsional stress from thread friction) do not exceed the yield strength ( γ0.2gamma sub 0.2 This step checks whether the bolt withstands the