The cost of end anchorage steel compared to entire structural element is ____________ a) High b) Low c) Equal d) Zero
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- Problem 1 An axial force of P is applied to the center of the rigid end plate shown below. If the portion of the load carried by the aluminum plates is half the portion of the load carried by the brass core, (a) determine the value of h, (b) the total load if the stress in the brass is 50 MPa. Brass core (E = 105 GPa) Aluminum plates (E = 70 GPa) Rigid end plate 300 mm 60 mim 40 mmTrue of false? The more ductile steel is, the greater will be its toughness.3. Discuss the ff property of steel: -Uniformity -Elasticity -Permanence -Ductility -Toughness -Corrosion -Fatique Principles of Steel Design (Civil Engineering)
- Problem 2 14600ksi, apr For the shown structure, AB is made by C83400-red-brass (Ebr 9.8 × 10-6/ °F) and BC is made by 2014-T6-aluminum (Eal 10600ksi, a al = 12.8 × 10-6/°F). AB and BC are joined at the collar B and fixed connected at their ends. The cross sectional area of each member is 1.75 in². If there is no load in the = member when T₁ 50 °F. Now the temperature for both members are increased to T₂ = 120 °F. Determine (1) Reaction forces at fixed end C (2) The average normal stress in the member AB (3) The average normal stress in the member BC (4) Eventually, how far will the collar B be displaced? = = 3 ft 2 ftIncrease the carbon content in steel results less in__- a. Life O b. Ductility c. Strength O d. CostA combined section of steel and copper is subjected to a compressive load. Refer to the table below for the properties of each Steel Copper Area, A 900 mm2 1,200 mm2 Modulus of elasticity, E 200 GPa 120 GPa ents Allowable compressive stress 140 MPa 70 MPa ces ents Which of the following most nearly gives the load, in percent, carried by the copper? ssors Select the correct response ication 44.44% Niki 55.56% Blogs 66.67% 33.33% Courses
- نقطة واحدة The ultimate tensile stress of gray cast iron is------than the * ultimate compressive stress same O less O more O more or less depending on other factorsDuring the tensile test, experiment on a sample of mild steel, data represented in the figure below was obtained with an initial diameter (do) of 0.505 inch. At failure, the reduced diameter (d;) of the sample was 0.305 inch. Gauge Length (Lo) is 2 inches and final Gauge Length (L) is 2.625 inches. Answer the questions below: Us TR 70- 60 - Lo LyP *IR 50 - EL PL: proportimal limit EL Elastic limit UXP = 4pper yield point Lyp : Lower us : uiti mated streagth IR : Indicanteed Strengty Rupture TR: True strength Ruptue 40 AL or 8t P 30 **PL (proportimal limt) Direct strain E strain (in/in) aStress Iblinz (esi) 0.003. ogo o-200Problem 2: A bronze bar is fastened between a steel bar and an aluminum bar as shown. Axial loads are applied at the positions indicated. Find the largest value of P that will not exceed an overall deformation of 3.0 mm, or the following stresses: 140 MPa in the steel, 120 MPa in the bronze, and 80 MPa in the aluminum. Assume that the assembly is suitably braced to prevent buckling. Use Est = 200 GPa, Eal = 70 GPa, and Ebr = 83 GPa. Steel Bronze 480 mm² 650 mm² 3P 1.0 m 4P 2.0 m Aluminum 320 mm² 1.5 m 2P
- d) No increase Which of the following is not a property of steel materials? C a) Homogeneous and isotropic b) Linearly elastic stress-strain behavior c) Recyclable d) Fire-resistantThe total tensile load of 160kN of a steel is to be stress at the middle portion limited to 150 N/mm2, find the diameter of the middle portion and also the length of the middle portion if the total elongation of the rod is to be 0.2mm. consider the young modulus of a steel.A strip of high-strength steel has a length of 30 cm and a cross section of 1 mm by 20 mm. The modulus of elasticity is 200 GPa and Poison’s ratio is 0.27. It is subjected to an axial load of 15000 N, and it is instrumented with two axial strain gauges with R= 120 Ω and a gauge factor of 2.10. The two fixed resistors are also 120 Ω, and the supply voltage is 2.5 V. The bridge is adjusted to zero voltage output before load is applied. Find the output of the bridge with load applied.