Q12. Determine the total compression of a bar made up of three circular cross-sections as shown in figure. The diameter being 10mm, 20mm and 30mm of the top, middle and the bottom portions respectively. Take ES = 210 GPa, EB = 105 GPa, EC = 100 GPa. %3D 50 kN STEEL- 30 mm BRASS 20 mm COPPER 40 mm

Elements Of Electromagnetics
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Q12. Determine the total compression of a bar made up of three circular cross-sections as shown in
figure. The diameter being 10mm, 20mm and 30mm of the top, middle and the bottom portions
respectively. Take ES = 210 GPa, EB = 105 GPa, EC = 100 GPa.
50 kN
STEEL
30 mm
BRASS
20 mm
COPPER –
40 mm
Transcribed Image Text:Q12. Determine the total compression of a bar made up of three circular cross-sections as shown in figure. The diameter being 10mm, 20mm and 30mm of the top, middle and the bottom portions respectively. Take ES = 210 GPa, EB = 105 GPa, EC = 100 GPa. 50 kN STEEL 30 mm BRASS 20 mm COPPER – 40 mm
Q17. A composite bar of 20mm x 20mm cross section is made up of three flat bars as shown in figure.
All the three bars are rigidly connected at the ends when the temperature is 20°C. determine (i) the
stress developed in each bar when the temperature of the composite bar is raised to 60°C (ii) the final
stresses in each bar when the load of 17.6 kN is applies to the composite bar. Es = 200 Gpa, EA1 = 80
Gpa, as = 22 x 10/ °C, aAi = 11 x 1o*/ °C.
%3D
STEEL
8mm
20 mm
ALUMINIUM
4 mm
STEEL
8 mm
-20 mm-
Transcribed Image Text:Q17. A composite bar of 20mm x 20mm cross section is made up of three flat bars as shown in figure. All the three bars are rigidly connected at the ends when the temperature is 20°C. determine (i) the stress developed in each bar when the temperature of the composite bar is raised to 60°C (ii) the final stresses in each bar when the load of 17.6 kN is applies to the composite bar. Es = 200 Gpa, EA1 = 80 Gpa, as = 22 x 10/ °C, aAi = 11 x 1o*/ °C. %3D STEEL 8mm 20 mm ALUMINIUM 4 mm STEEL 8 mm -20 mm-
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