Embedding

🧮 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. Introduction: the rubber-band-and-sponge model To fully understand the physical logic behind the “bearing-pressure check”, we can picture the bolted-joint system as “a stretched rubber band (the bolt) clamping a sponge (the clamped part)”. The heart of this part is to reveal a key question: why, when a part’s surface is crushed just a little bit, does the whole bolted joint face the risk of complete failure? ...