English: Example illustrating the principle of virtual cut and internal forces and moment.
A cantilever beam supports an uniformly distributed load of intensity q and a concentrated load in B. When cutting at a point C, the left trunk (#1) acts on the right trunk (#2) with a force and a moment MC1/2. Reciprocally, the right trunk (#2) acts on the left trunk (#1) with a force and a moment MC2/1;
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The internal force and moment are either the ones at the left of the cutting plane or the ones at the right.
Français : Exemple illustrant la principe de la coupure et les forces et moments internes.
Une poutre encastrée supporte une charge répartie q et une charge concentrée en B. Lorsque l'on coupe en un point C, le tronçon de gauche (n° 1) agit sur le tronçon de droite (n° 2) avec une force et un couple MC1/2. De manière réciproque, le tronçon de droite (n° 2) agit sur le tronçon de gauche (n° 1) avec une force et un couple MC2/1 ;
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Pour les efforts de cohésion, on considère soit les efforts à droite de la coupure, soit les efforts à gauche.
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{{Information |Description={{en|1=Example illustrating the principle of virtual cut and internal forces and moment. A clamped beam supports an uniformly distributed load of intensity ''q'' and a concentrated load <math>\vec{\mathrm{B}}</math> i
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