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ENGR 225 Section 2.1

Review ~ Force per Area. Normal Stress The average normal stress can be determined from s = P / A, where P is the internal axial load.Shear StressThe average shear stress can be determined from t = V / A, where V is the resultant shear force.. Strain. Deformation due to a stress is specified u

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ENGR 225 Section 2.1

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    1. ENGR 225 Section 2.1

    2. Review ~ Force per Area Normal Stress The average normal stress can be determined from s = P / A, where P is the internal axial load. Shear Stress The average shear stress can be determined from t = V / A, where V is the resultant shear force.

    3. Strain Deformation due to a stress is specified using the concept of normal and shear strain.

    4. Normal Strain Elongation or contraction of a line segment per unit of length.

    5. Shear Strain The change in angle the occurs between two line segments that were originally perpendicular.

    6. Volume and shape deformations

    7. Strain Normal strain causes a change in volume Shear strain causes a change is shape

    10. Problem 2-7: Find the normal strain developed in each wire if the force P cause point A to be displaced 2mm horizontally.

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