Click to see additional instructions Calculate the minimum Safety Factor if the radius r= 5mm and M= 17.5 Nm. The material is mild steel with Sy = 220 MPa.
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A: Solution :- Given data :- E =110 GpaLoad P =66000 NLength of rod L =380 mm
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A: Given DataP=5 kNSyt = 380 mPaFos =3
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A: Given: The tensile load, P = 65 kN The length of rod, L = 0.32 m The stress in the bar, σ = 240 MPa…
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- The rails of a railroad track are welded together at their ends (to form continuous rails and thus eliminate the clacking sound of the wheels) when the temperature is 60°F. What compressive stress ?? =6.5×10-6 /? is produced in the rails when they are heated by the sun to 120"F if the coefficient of thermal expansion a = the modulus of elasticity E = 30 × 106 psi?Solve the preceding problem if the internal pressure is 3,85 MPa, the diameter is 20 m, the yield stress is 590 MPa, and the factor of safety is 3.0. (a) Determine the required thickness to the nearest millimeter. (b) If the tank wall thickness is 85 mm, what is the maximum permissible internal pressure?A high-strength steel bar used in a large crane has a diameter d = 2.00 in. (sec figure). The steel has a modulus of elasticity E = 29 × 10 psi and Poisson’s ratio is v = 0.29. Because of clearance requirements, the diameter of the bar is limited to 2.001 in. when it is compressed by axial forces. What is the largest compressive load Pmaxthat is permitted?
- A steel pad supporting heavy machinery rests on Four short, hollow, cast iron piers (see figure). The ultimate strength of the cast iron in compression in 50 ksi. The outer diameter of the piers is d = 4.5 in, and the wall thickness is t = 0.40 in. Using a factor of safety of 3.5 with respect to the ultimate strength, determine the total load P that can be supported by the pad.Two steel wines support a moveable overhead camera weighing W = 28 lb (see figure part a) used For close-up to viewing of field action at sporting, events. At some instant, wire I is at an angle a = 22° to the horizontal and wire 2 is at angle fi = 40°. Wires I and 2 have diameters of 30and 35 mils, respectively. (Wire diameters are often expressed in mils; one mil equals 0.001 in.) (a) Determine the tensile stresses s and s2 in the two wires. (b) If the stresses in wires 1 and 2 must be the same, what is the required diameter of wire 1 ? (c) To stabilize the camera for windy outdoor conditions, a third wire is added (see figure part b). Assume the three wires meet at a common point coordinates (0, 0. 0) above the camera at the instant shown in figure part b. Wire I is attached to a support at coordinates (75 ft, 48 ft, 70 Ft). Wire 2 is supported at (-70 ft. 55 ft, 80 Ft). Wire 3 is supported at (-10 ft. -85 Ft, 75 ft). Assume that all three wires have a diameter of 30 mils. Find the tensile stresses in all three wiresA copper alloy pipe with a yield stress aY= 290 MPa. is to carry an axial tensile load P = 1500 kN (see figure part a). Use a factor of safety of 1.8 against yielding. (a) If the thickness t of the pipe is one-eighth of its outer diameter, what is the minimum required outer diameter dmin? (b) Repeat part (a) if the tube has a hole of diameter dt 10 drilled through the entire tube, as shown in the figure part b.
- See the set of bars for made of a material that has a yield strength of 350 MPa, determine the minimum h1 and h2 dimensions required. Apply a safety factor F.S. = 1.5 without flow. Each bar is 12 mm thickIf d=40 mm, L=796 mm, F=29 kN, T=1.7 kNm and fail stress=156 MPa, calculate the apparent factor of safety for this loading condition. Give your answer to 2 decimal places.If a key material has an ultimate strength of 120 ksi and a yield strength of 80 ksi and factor of safety N=2, what would be the design compressive stress in ksi? (a) 40 ksi (b) 60 ksi (c) 160 ksi (d) 240 ksi
- Two rods are connected to each other and are restrained at top and bottom. The top portion is steel with modulus of elasticity equal to 200x10^3 MPa and coefficient of thermal expansion equal to 11.7x10^-6/C, the bottom is made up of brass with modulus of elasticity equal to 105x10^3 MPa coefficient of thermal expansion equal to 20.9x10^-6/"C. The temperaturé rose to 50°C from normal condition introducing stresses in the bar. Determine the force induced in the bar. Note: Final Answer in 4 decimal places.A machine member is subjected to fluctuating stress , sigma = sigma_{0} * cos(8pi*t) The endurance limit of the material is 350 MPa. If the factor of safety used in the design is 3.5, what is the maximum allowable value of sigma_{o} ?A round cross-sectional bar d= 30 mm is cut from steel of Sut = 715 MPa. The bar is loaded with a completely reversed stresses. What is the strength of failure (in MPa) If only 10 4 cycles are needed? (Take fully corrected Se = 338 MPa, no need to use modification fcactors) (accepted answer range +/- 5 MPa)