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# ha5 - 16.20 Due Lecture 25 HOME ASSIGNMENT#5 Warm-Up...

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16.20 Due: Lecture 25 HOME ASSIGNMENT #5 Warm-Up Exercises Let’s consider a steel bar that is rigidly clamped at one end and free at the other end with a gap of 0.002L between that end and a wall. The bar is of length L, thickness h, and width b. Bending and instability issues are not of concern. The bar is subjected to a uniform temperature change of T from room temperature of 70°F. Properties of steel are modulus of 30 Msi, Poisson’s ratio of 0.3, and coefficient of thermal expansion of 6 µstrain/°F. h 0.002L L steel z x NOTE: For the following, determine the total strain and the two components of thermal and mechanical. 1. Determine the stress and strain state in the x-direction for temperatures where the bar end does not contact the wall. 2. Determine the temperature at which the bar first contacts the wall and the corresponding stress and strain state in the x-direction. 3. Determine the stress and strain state in the x-direction for temperatures where the bar end does contact the wall.

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16.20 Home Assignment #5
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