02-02ChapGere.0014

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Problem 2.4-6 A plastic rod AB of length L 0.5 m has a diameter d 1 30 mm (see figure). A plastic sleeve CD of length c 0.3 m and outer diameter d 2 45 mm is securely bonded to the rod so that no slippage can occur between the rod and the sleeve. The rod is made of an acrylic with modulus of elasticity E 1 3.1 GPa and the sleeve is made of a polyamide with E 2 2.5 GPa. (a) Calculate the elongation of the rod when it is pulled by axial forces P 12 kN. (b) If the sleeve is extended for the full length of the rod, what is the elongation? (c) If the sleeve is removed, what is the elongation? Solution 2.4-6 Plastic rod with sleeve SECTION 2.4 Statically Indeterminate Structures

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