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Deformations and stresses are different things. Stresses and strains are a function of the derivative of deformations, not the values. Consider a rod in tension, fixed at one end with a tension force applied to the other. The normal stress in every part of the rod is force over area. This is just as true for the fixed face as the other faces. This has ...


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Although the face of the element is rigid and does not move with respect to other points in the face, you are using a 3d element (a volumetric). Therefore while one face of the element is unstressed, the other faces are subjected to stresses. Therefore, the element is in a state of stress, despite one face of it being fixed and unstrained (like you've ...


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