Part B - Average normal strain in cable S Determine the average normal strain in cable S due to the load of the tractor trailer and consequent drop of the roadway. Express your answer in percent strain to three significant figures.
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Part B - Average normal strain in cable S
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- A wine of length L = 4 ft and diameter d = 0.125 in. is stretched by tensile forces P = 600 lb. The wire is made of a copper alloy having a stress-strain relationship that may be described mathematically by =18,0001+30000.03(=ksi) in which is nondimensional and has units of kips per square inch (ksi). (a) Construct a stress-strain diagram for the material. (bj Determine the elongation, of the wire due to the Forces P. (c) IF the forces are removed, what is the permanent set of the bar? (d) If the forces are applied again, what is the proportional limit?(a) Solve part (a) of the preceding problem if the pressure is 8.5 psi, the diameter is 10 in., the wall thickness is 0,05 in., the modulus of elasticity is 200 psi, and Poisson's ratio is 0.48. (b) If the strain must be limited to 1.01, find the maximum acceptable inflation pressureDetermine the strain energy per unit volume (units of psi) and the strain energy per unit weight (units of in ) that can be stored in each or the materials listed in the accompanying table, assuming that the material is stressed to the proportional limit. DATA FOR PROBLEM 2.7-5 Material Weight Density (lb/in3) Modulus of Elasticity (ksi) Proportional Limit (psi) Mild sleel 0.284 30,000 36,000 Tool steel 0.284 30,000 75,000 Aluminum 0.0984 10,500 60,000 Rubber (soft) 0.0405 0.300 300
- A spherical steel pressure vessel (diameter 500 mm, thickness 10 mm) is coated with brittle lacquer that cracks when the strain reaches 150 X 10~ (see figure). (a) What internal pressure p will cause the lacquer to develop cracks? (Assume E = 205 GPa and v = 0.30.) (b) If the strain is measured at 125 x 10-6, what is the internal pressure at that point?During stress-strain test, the unit deformation at a stress of 35 MPa was observed to be 167 x 10^-6 m/m and at a stress of 140 MPa it was 667 x 10^-6. If the proportional limit was 200 MPa, what is the modulus of Elasticity (GPa)? What is the strain corresponding to a stress of 80 MPa?A metal bar 5.0 m long extends by 0.05 mm when a tensile load is applied to it. The percentage strain is:
- What is the tensile strength of the bar if the yield stress is equal to 275MPa?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 thickA tensile force of 10 kN is applied on a 0.02-m diameter and 2-m long rod. After applying theload, the diameter of the rod decreases to 0.01998 m and the length increases to 2.01 m. The lateral (transverse) strain is?
- With aid of diagram, describe a tensile experiment. Include the stress-strain curveA composite rod of overall length of 200 mm comprised of a steel rod and brass rod attached rigidly to the end. The diameter and the length of the steel rod are given as 10 mm and 120 mm,respectively, the diameter and the length of the brass rod as 20 mm and 80 mm respectively. The rod is used as a tie in a link mechanism and the strain in the brass rod is limited to 0,00053. Given that the total extension of the composite rod must not exceed 0,1624 mm and E for steel is 200 GPa, respectively. Determine : A) Strain in the steel rod B) Load carried by the steel and brass rods C) Modulus of elasticity for the brassSketch the typical engineering stress-strain diagram behaviour to fracture point, F and the tensile strength TS, together with the geometry of the deformed specimen at various point along the curve.