A steel block of size 300 mm X 150 mm X 100 mm subjected to load of 300 kN (tension) on 150 mm X 100 mm face, 500 kN (compression) on 300 mm X 150 mm face and 100 kN (tension) on 300 mm X 100 mm face. Determine change in volume if poisons ratio is 0.25, E = 2 X 10^5 MPa
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A steel block of size 300 mm X 150 mm X 100 mm subjected to load of 300 kN (tension) on 150 mm X 100 mm face, 500 kN (compression) on 300 mm X 150 mm face and 100 kN (tension) on 300 mm X 100 mm face. Determine change in volume if poisons ratio is 0.25, E = 2 X 10^5 MPa
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- According to Figure 5-20, is ii possible to completely separate one of the four materials from the other three? Explain your answer.A lead cylinder is placed into a blind hole cut into a large tungstenblock, Assume it is a tight fit. 50 MPa pressure is applied to the top of the cylinder.The cylinder is 100 mm long, and 25 mm in diameter. c)How much shorter will the cylinder get under load? d)What is the volume change? e)Supposethere was a “new lead alloy”where the supplierclaimed it had a Poisson’sratio of0.75. Explain why this claimdefies logic.The compound bar containing steel bronze and aluminum segments carries the axial loads shown in the figure. The properties of the segments are listed in the table. Determine the maximum allowable value of P in pounds if the change in length of the entire bar is limited to +0.07in. Steel Bronze Aluminm (A) 22,250 B) 26,250 25,250 D) 27,250 A (in²) 0.75 1 0.5 2P Steel 2 ft Bronze 4 ft 5P E (psi) 30000000 12000000 10000000 4P+ Aluminum 3 ft P L (FT) 4 3
- Mohr's circle is shown for a point in a physical object that is subjected to plane stress. Each grid square is 880 psi in size. (a) Determine the stresses Ox, Øy, and the magnitude of Txy and show them on a stress element. (b) Determine the principal stresses and the magnitude of the maximum in-plane shear stress acting at the point and show these stresses on an appropriate sketch (e.g., see Figure 12.15 or Figure 12.16). C X Ø C y (1 bFor the figure shown, if the temperature dropped by 40° C in the aluminum rod, then the stress in the steel rod is 0.75m 0175m * ₹. rigid bar St. |L=1.5m A=250mm² E=200GPa x = 12×106/C AL L=1m A=1000 mm² E=70 GP₂ x=23x106 20.7 MPa O 55.4 MPa O 42.6 MPa O 83.1 MPa O 61.5 MPa O6. Two 8 x 4 x 1 inch blocks of foam are glued together (one block on top of the other) and used to support the bottom face of a product. The product weights 15 pounds. The stiffness of each of the blocks respectively is 50 lb/in and 25 lb/in. When the product is placed on the blocks of foam ... a) What is the total foam deflection? b) What is the static load on the foam block? c) What is the natural frequency of the total system?
- 10:59 0.63 a. Y l KB/S VPN tutorial 1.pdf Axlal 1oads are applied to uie compounu rou inal is composeu of an aluminum segment rigidly connected between steel and bronze segments. (a) What is the stress in each material given that P = 10 kN? (b) Find the largest safe value of P if the working stresses are 120 MPa for steel, 68 MPa for aluminum, and 110 MPa for 2. Aluminum Steel A=300 mm² Bronze A=400 mm? A=600 mm² 2P 4P 3m -5m 4m bronze. Answer: a) 0one = 50 MPa; ouminum = 33.3 MPa; oel = 100 MPa ; b) P = 12KN A circular aluminum tube of length L = 400 mm is loaded in compression by axial forces P at the ends. The ou inside diameters are 60 mm and 50 mm, respectively. A strain gage is placed on the outside of the bar to measur strains in the longitudinal direction (axial direction). (a) If the measured compressive strain is ɛ = 550×10-6 , what is the shortening ô of the bar? (b) If the compressive stress in the bar is intended to be 40 MPa, what should be the load P? Answer: a) 8 = 0.22…A member 1.5 m long has a cross section 75 mm by75 mm. The member becomes 0.7 mm longer and0.01 mm narrower after loading. Determine Poisson’sratio for the material.In (Figure 1), k = 180 N/m. Figure 2 m -2 m D -3 m- wwwwww 1 of 1 Part A Determine the unstretched length of DB to hold the 40-kg crate in the position shown. Express your answer to three significant figures and include the appropriate units. 1 = O Ti Value Submit μA Provide Feedback Request Answer Units
- A cylindrical tank is manufactured based on the following data: internal pressure: 2640 psi factor of safety with respect to YP: 2.0 yield stress in tension (circumferential): 65 000 psi yield stress in shear (longitudinal): 32 000 psi (a) Determine the minimum wall thickness if the diameter of the cylindrical steel tank is 7 inches. (b) Determine the maximum acceptable internal pressure if the wall thickness is 0.25 inches. - include complete solutions and FBD1.46: A contractor claims that the mean compressive strength for a concrete mix is 5000 psi (μ) and that it has a standard deviation of 400 psi (σ). If you break 20 cylinders (N) and obtain a mean compressive strength of 4,800 psi (m), would you believe the contractor’s claim? Why? (Hint; Use statistical t-test.) Next, what is the maximum number of breaks (N) that could be performed that WOULD make you believe the contractor’s claim? Assume that the results wouldn’t change, i.e. σ = 400 psi and m = 4,800 psi. Recall that the equation to find the lower bound of a one sided distribution is LB = μ - (tσ)* σ/(N^0.5) Because the sample size is relatively small, use the ‘student t test’ to represent the normal distribution. You should have at least 95% confidence in the results. That means that α = 0.05. Keep in mind that this is a one tailed distribution, since we only care about the lower bound (i.e. meaning that we are only concerned about concrete that doesn’t meet our minimum strength…Stress amplitude, S (MPa) 500 400 300 200 100 180 70 60 50 40 30 20 10 Stress amplitude (ksi) 1045 steel 2014-T6 aluminum alloy Red brass 0 0 10³ 104 105 107 108 109 1010 106 Cycles to failure, N 3-S-N curve for several different engineering materials (mean A 6.4 mm diameter cylindrical rod fabricated form 1045 steel is subjected to fully reversed tensile-compression loading. If the maximum tensile and compressive loads are 10300N, determine the fatigue life.