Example1
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A couple of equal and opposite forces F acting on a cuboid keep it at rest. To calculate the normal nominal stress on cross-section A in the middle of the cuboid, it is assumed that the cuboid is stiff, made of a continuous, isotropic, and homogeneous material, and the stress is equally distributed on cross-section A.
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Example1
- 1. PROBLEM: A couple of forces, each having magnitude F, keep a cuboid at rest. Mathematically, action of this couple can be represented by two collinear vectors as shown in the figure. Calculate normal nominal stress acting on the cross-section A located in the middle of the plate length. The cross-section A is parallel to the base of the cuboid. SOLUTION: One simple way of calculating the required stress is to assume that the cuboid (i) is stiff enough to prevent any deflection due to the action of gravity on its mass, (ii) is made of continuous, isotropic and homogeneous material, and (iii) geometry allows for ideally equal distribution of stress within the cross-section A.