The bronze bar 2.7 m long with a cross-sectional area of 415 mm2 is placed between two rigid walls. At a temperature of 8.1 °C, there is a gap Δ = 2.32 mm, as shown in the figure. Find the compressive force (in N) experienced by the bar at a temperature of 68.66 °C. Use α = 18 × 10-6 /°C and E = 80.71 GPa. Round off your answer to three decimal places.

A circular bar of magnesium alloy is 750mm long. The stress-strain diagram for the material is shown in the figure. The bar is loaded in tension to an elongation of 6.0mm and then the load is removed. (a) That is the permanent set of the bar?  (b) If the bar is reloded, what is the proportional limit? hint: Use the concepts illustrated in figs 1-39b and 1-40

Let's consider a rod having a solid circular cross-section with diameter of 5 mm and it is made of a material having a Young's modulus E = 200 Gpa and a Poisson's ratio of 0.3. If a tensile force F is subjected to that rod cross-section, the diameter becomes 4.995 mm. determine the applied force F. Select one: O F = 5236 N O F = 6283 N %3D O F= 13090N O F = 10472 N O F= 15708N OF=4189 N 9:22 PM EN ? 4/15/2021

Calculate Strain energy for truss DF. Enter your answer in J to 2 decimal places.

A rectangular bar of length L has a slot in the central half of its length. The bar has width b, thickness t, and elastic modulus E. The slot has width b/3. The overall length of the bar is L = 560 mm, and the elastic modulus of the material is 68 GPa. If the average normal stress in the central portion of the bar is 210 MPa, calculate the overall elongation δ of the bar.

A steel bar, the material of which is S355 J2 G3, binds two walls together. Pre-tensioning in tie bar 4.3 kN. The temperature of the rod increases by 15 °C. Calculate the normal stress in the cross section of the bar. L = 600 mm, α = 12μ 1/°C, E = 200 GPa and d = 25 mm . Give the answer in MPa as a whole number as a numerical value only.    Correct answer to exercise should be = -27

Two round solid bars of different materials are connected in series against rigid supports as shown in Figure 4. Determine the stress in each bar and the support reactions if temperature is increased by 18° C. Bar A da, EA, A Bar B dв, Ев, ав LA LB Figure 4 Use the following information. Bar, B: Length, LB Diameter, dB Poisson's Ratio Young's Modulus EB = 210 kN/mm2 Coefficient of expansion aB = 12.4x106 °C- Bar, A: Length, LA Diameter, dA = 25mm =D40 mm = 10 mm 30 mm S. = 0.28 =D0.32 = 70 kN/mm² Coefficient of expansion aa = 16.5x10-6 °C-I Poisson's Ratio %3D Young's Modulus EA