https://mechcalc.net/blog/en/tags/preload/ Recent content in Preload on MechCalc how-to Guide https://mechcalc.net/blog/og-default.png https://mechcalc.net/blog/og-default.png Hugo en Mon, 20 Apr 2026 19:00:00 +0200 https://mechcalc.net/blog/en/posts/vdi2230-09-worked-example-esv/ Mon, 20 Apr 2026 19:00:00 +0200 https://mechcalc.net/blog/en/posts/vdi2230-09-worked-example-esv/ A full VDI 2230 tapped-thread joint (ESV/TTJ) worked example. Compared with the previous DSV example, it highlights the key ESV differences in the resilience calculation, the nut-region elastic modulus, and the engagement-depth check. https://mechcalc.net/blog/en/posts/vdi2230-08-worked-example-dsv/ Mon, 20 Apr 2026 18:00:00 +0200 https://mechcalc.net/blog/en/posts/vdi2230-08-worked-example-dsv/ A full VDI 2230 through-bolt joint (DSV) worked example, going through R0–R13 in all 14 steps. It includes the specific input parameters, the intermediate result of each step and the final safety factors, tying the theory of the previous 7 articles into one executable calculation chain. https://mechcalc.net/blog/en/posts/vdi2230-06-preload-design-r1-r6/ Mon, 20 Apr 2026 16:00:00 +0200 https://mechcalc.net/blog/en/posts/vdi2230-06-preload-design-r1-r6/ The upper half of the VDI 2230 calculation chain R1–R6 explained: the tightening factor αA, the three sources of the minimum clamping force FKerf, the choice of force-ratio Φ formula, preload loss (embedding + thermal expansion), and the derivation of the minimum and maximum assembly preload. https://mechcalc.net/blog/en/posts/vdi2230-03-spring-model-force-distribution/ Mon, 20 Apr 2026 12:00:00 +0200 https://mechcalc.net/blog/en/posts/vdi2230-03-spring-model-force-distribution/ A detailed look at the core physical model of VDI 2230: the spring model (Federmodell), the elastic resiliences δS and δP, the joint diagram (Verspannungsschaubild), the physical meaning of the force ratio Φ, and the full derivation logic of the main equation Eq.16. https://mechcalc.net/blog/en/posts/vdi2230-01-why-systematic-calculation/ Mon, 20 Apr 2026 10:00:00 +0200 https://mechcalc.net/blog/en/posts/vdi2230-01-why-systematic-calculation/ VDI 2230 is the globally recognized standard for the systematic calculation of high-strength bolted joints. This article explains the shortcomings of a simple strength check, the 14-step VDI 2230 calculation chain and the physical meaning of its main equation, to help engineers see why systematic bolt calculation is necessary.