Ensure that the combined stresses during assembly (tensile stress from preload + torsional stress from the tightening torque) do not exceed the yield point of the bolt material. VDI 2230 specifies utilizing up to . Step 12: Validation of Bolt Stresses in Working State
) is applied to the joint, it does not act entirely on the bolt. Instead, it is divided:
Embedding (the settlement of threads and head interfaces) is highly non-linear. VDI 2230:2021 provides new experimental data for: vdi 2230 2021
The bolted joint is the silent workhorse of every machine. Ignoring the 2021 update is not just a technical oversight; it is a liability risk. VDI 2230:2021 offers:
: Calculating the force needed to prevent separation or slippage. Ensure that the combined stresses during assembly (tensile
Account for . Microscopic roughness on the contact surfaces flattens out after assembly, causing a permanent loss of preload. R8: Safety Against Yielding During Assembly
The total stress on the bolt during tightening (combined tensile and torsional stress) and during operation must not exceed the bolt material's yield point ( Rp0.2cap R sub p 0.2 end-sub Instead, it is divided: Embedding (the settlement of
FMmax=FMmin⋅αAcap F sub cap M space m a x end-sub equals cap F sub cap M space m i n end-sub center dot alpha sub cap A R5: Calculation of Resilience ( δBdelta sub cap B δMdelta sub cap M
: Calculating required assembly preload while accounting for tightening technique scatter.
The , developed by the Association of German Engineers (Verein Deutscher Ingenieure), is the global gold standard for the systematic calculation of high-strength bolted joints. The latest full revision, VDI 2230 Part 1 (2021) , refines these calculation models to account for modern manufacturing tolerances, updated material sciences, and advanced tightening techniques.
The you must check:
Search and Filter Fonts