🧮 在线计算器：VDI 2230 Bolted Joint Calculation — The full 14-step calculation chain (R0–R13), with six strength checks. Full worked example: through-bolt joint (DSV) This article ties all the theory of the previous 7 articles into one complete calculation chain. Using a concrete engineering case, we go through every step of R0–R13. Engineering problem statement A steel flange joint using a single bolt to fix a cover plate. The design requirements are: ...
🧮 在线计算器：VDI 2230 Bolted Joint Calculation — The full 14-step calculation chain (R0–R13), with six strength checks. Preload design: from functional requirement to assembly preload (R1–R6) The 14-step VDI 2230 calculation chain splits into a design part (R0–R6) and a verification part (R7–R13). This article explains the core steps of the design part. 1. R0 — preliminary diameter selection The task of R0 is to preliminarily fix the nominal diameter $d$ based on experience or a simplified method (such as the Kübler equation), and to check the interface limiting dimension (VDI 2230:2015, §4.2, Eq. R0/1, R0/2): ...
🧮 在线计算器：Bolt Pre-selection Calculator — Fast sizing with the Kübler equation; supports a design mode and a check mode. Preliminary sizing of a bolted joint: from load to size, fast Before getting into complex system-level bolted-joint calculations, the first challenge an engineer faces is often: “for a given working load, how large should the bolt be? Is M8 enough, or M12?” A sound preliminary design / pre-selection (German: Vorauslegung) quickly fixes a suitable nominal diameter and does an early “sweep” for common failure modes (such as fatigue fracture, or loss of preload from crushing of the bearing surface). This article shows how to do a quick pre-selection from the working load, and how to check the feasibility of the design with simplified formulas. ...