In the plastic range of a material, if the load is removed the material will: a. reach failure and break O b. continue up to elastic limit O C. go back to its original shape o d. remain in its current shape
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- 3) An bronze rod is rigidly attached between a aluminum rod and a steel rod as shown. Axial loads are applied at the positions indicated. Find the maximum allowable value of P that will not exceed a stress in steel of 140MPA, in aluminum of 90MPA or in bronze of 100MPа. Aluminum A = 500mm? Bronze A = 200mm? Steel A = 150mm2 2P ЗР L st = 1.2m L br = 2m Lal = 3.5mAxial Load, P(kN) A 2 m long axially loaded mild steel rod of 8 mm diameter exhibits the load-displacement (P -8) behavior as shown in the figure. 14000 12000 10000 8000 6000 4000 2000 0 1 2 7 8 9 10 3 4 5 6 Displacement 8(mm) Assume the yield stress of steel as 250 MPa. The complementary strain energy (in N-mm) stored in the bar up to its linear elastic behavior will bePolicie Current Attempt in Progress A steel [E = 29900 ksi, a = 6.5x10-6/°F] bar is held between two rigid supports. The bar is stress free at a temperature of 72°F. The bar is then heated uniformly. If the yield strength of the steel is 45 ksi, determine the temperature at which yield first occurs. Answer: T= i °F
- Problem 1.5-2 A bar of length 2.0 m is made of a structural stoel having the stres-strain dingram shown in the figure. The yield stresa of the steel is 250 MPa and the slope of the initial lincar part of the stress-strain curve (modulus of elasticity) is 200 GP. The bar is loaded axially until it eklongates 6.5 mm, and then the load is removod. How does the final length of the bar compare with its orig- inal length? Hint: Ue the concepts illustrated in Fig. 1-36h) MP 300 200 100 0.002 0.004 0.0062. A rod is composed of an aluminum section rigidly attached between steel and bronze sections as shown in the figure. Axial loads are applied at the positions indicated. The cross-sectional area of the rod is 300sq.mm. Express your answer in MPa. Determine the stress in the steel. b. a. Determine the stress in the aluminum. Determine the stress in the bronze. C. STEEL ALUMINUM BRONZE 56kN 14kN -0.6m- -0.9m- -0.76m-An aluminum bar carries the axial loads at the positions shown. If E=70GPA, compute the total deformation of the bar. Assume that the bar is suitably braced to prevent buckling. 0.4m D 1) What is the deformation 8Ag in mm? 10KN 0.8m 0.4m 5KN 0.6m 20KN A=800 mm? A=1,200 mm²
- An aluminum bar carries the axial loads at the positions shown. If E=70GPA, compute the total deformation of the bar. Assume that the bar is suitably braced to prevent buckling. 0.4m 10KN 0.8m 0.4m 5KN 0.6m What is the deformation 8Rc in mm? Al 20KN A=800 mm? A=1,200 mm²A hollow aluminum tube is rigidly attached between steel rod and a bronze rod as shown. Axial loads are applied at the positions indicated. Find the maximum value of P that will not exceed a stress in aluminum of 80 MPa, in steel of 150 MPa or bronze of 100 MPa. Steel Aluminum Bronze А P> ЗР - 2P outside = 30 mm d inside = 20 mm d d = 16 mm d = 60 mm -100mm- -150mm- -125mm-A beam made of titanium has a yield point of 800 MPa. The beam has 2 cm x 6 cm rectangular cross section and bends about an axis parallel to the 2-cm face. If the maximum bending stress is 600 MPa, find the corresponding bending moment.
- PROBLEM 1) An aluminum bar carries the axial loads at the positions shown. If E=70GPA, compute the total deformation of the bar. Assume that the bar is suitably braced to prevent buckling. 0.4m D 10KN 0.8m 0.4m 5KN 0.6m A 20KN 3) What is the deformation &cn in mm? A=800 mm? A=1,200 mm²The material returns to its original shape when the load is removed. (A Elastic Limit B Elastic Behavior Limit c) Maximum Limit D D Proportional Limit4) 4 points Calculate the minimum net area for the plate shown below connected to 14 mm thick gusset plate with 22 mm bolts. Plate 12 mm thick 35mm 20mm 20mm 150 mm 20mm 20mm 35mm „Gusset 14 mm thick 35mm 30mm 30mm 40mm a. 936 mm? b. 918 mm? c. 900 mm? d. 887 mm?