https://eng-tools.dev/tags/dynamics/ Recent content in Dynamics on Engineering Tools Hugo en Fri, 05 Jun 2026 00:00:00 +0000 https://eng-tools.dev/series-e/2-mode-coupling/ Fri, 05 Jun 2026 00:00:00 +0000 https://eng-tools.dev/series-e/2-mode-coupling/ A disc brake can squeal even when the friction coefficient barely changes with speed. A minimal two-degree-of-freedom model shows why: the squeal is not driven by friction that weakens with speed, but by the geometry of the coupling between two springs, which friction makes asymmetric.