! Required information 10-m-long steel rails of a railroad track (Es = 200 GPa and as = 11.7 × 10-6/°C) were laid at a temperature of 7.5°C. Determine the normal stress in the rails when the temperature reaches 48°C, assuming that the rails are 10 m long with 3-mm gaps between them. The normal stress in the rails is MPa.

1. Determine the internal stresses developed in bars JH and HY when bar JH experiences a change in temperature of -250•C. Bar JH is made of aluminum, while bar HY is made of steel. Both bars have the same cross-sectional area. Note: Pin H is connected to a wheel that is restricted to move along the inclined slope. J 450 H 1 m 250 Y 2 m Material a (/°С) E (GPa) Steel 11.9 x 10-6 200 Aluminum 22.5 x 10-6 70

Determine the stress in the Aluminum rod (Psi) after the load 68 (kips) is applied. The light rigid bar ABCD is pinned at 8 and connected to two vertical rods. Assuming that the bar was initially horizontal and the rods stress-free.

The cylinder of a portable hydraulic riveter is 220 mm in diameter. The pressure of the fluid is 14 N/mm2 by gauge. Determine suitable thickness of the cylinder wall assuming that the maximum permissible tensile stress is not to exceed 105 MPa. Assume material of cylinder as Steel.

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PLEASE DRAW the Free body diagram (FBD) and explain reasoning.