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- (40 How A Rismatic steel bar of a Square cro ss section (looxlo0)mm is loaoled by Compressive force P= 1300 K, the bar has length 2.5 m, Eg=200GPay V=0.3,determine the shortening 8, the increase in the dimensions of cross Section, the change in Volume DV of the bar? loomm loommWhat is the value of reduction factor of the beam, if the stress in the steel is 400 MPa, and the Modulus of Elasticity of the Steel is 200,000 MPa. O 0.671 0.692 O 0.660 O 0.650 None of the Choices O 0.681Axial loads are applied to the compound rod that is composed of an aluminum segment rigidly connected between steel and bronze segments. What is the stress (in Mpa) in the bronze given that P= 188 kN? Express your answer in four decimal places.
- Problem 6: The compound bar containing steel, bronze, and aluminum segments carries the axial loads shown in the figure. The properties of the segments and the working stresses are listed in the table. Bronze A (in.²) Steel 2 ft E (psi) Ow (psi) Aluminum 4 ft 3 ft 2P Steel 0.75 30 × 106 20 000 Bronze 1.00 12 x 106 18 000 ЗР 4P Aluminum 0.50 10 × 106 12 000 Determine the maximum allowable value of P if the change in length of the entire bar is limited to 0.08 in. and the working stresses are not to be exceeded.} 8) A tensile load of 3000 N is applied to a steel bar of cross-sectional area 500 mm?. If a tensile load was applied to an aluminum bar to achieve the same lateral (transvers) strain with the former (steel bar), what would be the load? Note: Original dimensions of the two bars are the same (Est = 2.1 x 105 MPa, Eat = 0.703 × 105 MPa, vg = 0.3, vat = 0.33) E = º , v = - Saterat Eaxial Fatuminum™ 3000 N A-500 mm² A=500 mm² Fatuminum=? 3000 N Steel AluminumII. STEEL 1. Define the Tension test for rebars 2. Enumerate and explain different methods of Testing Steel 3. Complete the table below: Bar Classification Diameter (mm) Gauge Length (mm) Weight (kg) Unit weight of steel is 7850kg/m³ Maximum Load (KN) Area (mm²) Tensile Strength (MPa) Length after Tensile Test (mm) Elongation (mm) Deformed 500 201.0619 414 503.25
- Axial loads are applied to the compound rod that is composed of an aluminum segment rigidly connected between steel and bronze segments. What is the stress (in Mpa) in the steel given that P= 96.3 kN? Express your answer in two decimal places.Q5 A specimen of magnesium having a rectangular cross section of dimensions (3.2 mm X 19.1 mm) and gage length 63.5 mm is deformed in tension. Using the load-elongation data tabulated as follows load (N) and Extension (mm), Find the standard mechanical properties. load 1380 2780 5630 7430 8140 9870 12850 | 14100 14340 13830 12500 Ext. 0.03 0.06 0.12 0.2 0.25 0.64 1.91 3.18 4.45 5.72 6.99 a) Draw the stress strain curve. b) Find the young modulus. c) Find the proof stress d) Find the ultimate tensile strength. e) Find the fracture stress f) Find the maximum strain.A flanged bolt coupling consists of six 12-mm diameter steel bolts evenly spaced around a bolt circle 300 mm in diameter, and four 25-mm diameter aluminum bolts on a concentric bolt circle 200 mm in diameter. What torque can be applied without exceeding a shearing stress of 60 MPa in the steel and 40 MPa in the aluminum? Use G of ateel = 83 GPa and G for aluminum = 28 GPa. Express your final answer in N.m to the nearest whole number. Do not include the unit in your answe
- The cross-sectional area of an aluminum bar is 170 mm?. It carries an axial loads at the positions as shown in the figure. Compute the total deformation of the bar if E = 80 Gpa. Assume the bar is suitably braced to prevent buckling. Add "9" in the loads only. Example: 40+9=49, 18+9=27, 42+9=51, 20+9=29 Area = 170mm' 2 40KN 18KN 20KN 42KN 1.0m 1.80m 0.70mA 6m long solid bar of circle section has 140mm diameter for aluminum for length of 4m, while it has 120mm diameter for a length of 2m for steel bar, as shown in figure. Find the elongation of the bar, when it is subjected to an axial tensile force of 300 kN. Take Est-200GPa, Eal- 70 GPa. (30 marks) 140 I *** 300 Kn Aluminum (30 marks) 4 m Steel 2 m 300 Kn 120Which among the formulas below can be used to compute the combined stress at the bottom fiber of a beam subjected to axial tension and negative bending moment? 1 Question 2 a.+ P/A + Mc/l b.+ P/A- Mc/l c.- P/A + Mc/l d.- P/A - Mc/l