[7] Given the following stress tensor in Cartesian coordinates: [2.74 -2.12 3.69 Sym (a) Find the stress tensor in a new coordinate system rotated 30° around the z-axis. (b) Find the principal stresses and the direction of the 11. [0] = 4.07 −3.02| · 103 ΚΡα 5.05

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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.