https://mechcalc.net/blog/en/tags/preload-loss/ Recent content in Preload Loss on MechCalc how-to Guide https://mechcalc.net/blog/og-default.png https://mechcalc.net/blog/og-default.png Hugo en Mon, 13 Apr 2026 21:15:00 +0200 https://mechcalc.net/blog/en/posts/bolt-preselection-04-bearing-pressure/ Mon, 13 Apr 2026 21:15:00 +0200 https://mechcalc.net/blog/en/posts/bolt-preselection-04-bearing-pressure/ Why does a bolted joint fail as a whole when the surface is only crushed a tiny bit? This article uses the model of a 'stretched rubber band clamping a sponge' to see through the mechanics of the bearing-pressure check: from microscopic peak crushing and macroscopic embedding (Setzen), to the elastic recoil that causes an irreversible loss of preload (clamping force), to the chain failure of loosening and fatigue fracture — and gives engineering measures such as controlling the limiting surface pressure and enlarging the bearing area.