9.2.1 - Internal Work
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Practice Questions
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What is strain energy?
💡 Hint: Think about how much energy a material can hold as it bends or stretches.
What does the Modulus of Elasticity (E) represent?
💡 Hint: Consider how stretching affects the material.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the primary formula for calculating strain energy in axial members?
💡 Hint: Remember, this relates directly to how much force is distributed over an area.
True or False: Shear modulus has no influence on strain energy calculations for torsional members.
💡 Hint: Think about how materials respond to twisting.
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Challenge Problems
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A steel beam is subjected to an axial load of 150 kN. If the beam has a cross-sectional area of 0.01 m² and an elastic modulus of 210 GPa, calculate the strain energy stored in the beam if it elongates by 1 mm.
💡 Hint: Use the relationships established for stress and strain to formulate the solution.
A circular shaft with a radius of 50 mm is subjected to a torsional moment that generates a shear stress of 60 MPa. Calculate the strain energy per unit volume if the shear modulus is 80 GPa.
💡 Hint: Make sure to reference the relationship for torsional strain energy derivation.
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