ILL 20 mm) 80 mm 20 mm 120 mm A square box beam is made of two 20x80-mm planks and two 20x120-mm planks nailed together as shown. Knowing that the spacing between the nails is s= 30 mm and that the vertical shear in the beam is V=1200 N, determine (a) the shearing force in each nail, (b) the maximum shearing stress in the beam.

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Stress transformation

The term stress indicates the measure of internal forces that develop due to an external force's application on an object. When a specific external force is applied to an object, internal stress generates in the material. The value of stress can obtain by taking the ratio of the externally applied force and cross-sectional area of the object. There are different types of stress depending on the type of external force.