A composite bar having two sections of cross-sectional area 100mm2 and 200mm2 respectively. The length of both the sections is 100mm. What will be the total elongation of bar if it is subjected to axial force of 100kN and E = 105 N/mm2?

A composite bar having two sections of cross-sectional area 100mm2 and 200mm2 respectively. The length of both the sections is 100mm. What will be the total elongation of bar if it is subjected to axial force of 100kN and E = 105 N/mm2? Correct Answer 1.5

Elongation in section 1 = 100,000 x 100 / 100000 x100 = 1 Elongation in section 2 = 100,000 x 100 / 100000x 200 = 0.5 Total elongation = 1 + 0.5 = 1.5mm.
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