Two materials with 10 mm² contact area have been tested to determine how much adhesive wear takes place when they are run together. Table P7-1 shows the test parameters and average depth-of-wear results for 350 tests. Find the average wear coefficient if the Brinell hardness of the softer of the two materials tested is HB 277
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- A 1 foot plate with a 0.25-inch thickness has a width of 2.4 inch and a hole at the middle with a diameter of 2 inch. The material has an ultimate strength of 132 ksi and a yield strength of 84 ksi. A repeated 52N tensile load is applied along its neutral axis in the direction of its length at a temperature of 90 degree fahrenheit. The surface finish is Ground. The reliability of the material is targeted at 99.99%. Calculate: The Theoretical Stress Concentration Factor The Fatigue Stress Concentration Factor The Factor of Safety for the Goodman Criterion The Factor of Safety for the Soderberg Criterion The Factor of Safety for the Gerber Criterion The Factor of Safety for the ASME-Elliptic Criterion.M 1:A I. 3, O photo_2021-02-1.. -> 200 streas (MPa) 100 50 strain From the tensile stress-strain behavior fer the brass specimen d the diamcter is 12-8 mm Calculate the faibuding :- |- The Yield stress. 2-Modulus of elasticity. 3 - The Tensile strength . IIIn a standard tensile test, an aluminum rod of 20-mm diameter is subjected to a tension force of P- 30 kN. Knowing that E- 70 GPa, and the change in diameter of the rod- 0.00955 mm, determine the poissons' ratio v. 20n diateter gage length-150 0.33 O 0.6 0.29 O 0.35
- Zhpe Outine lece Select 834 Anange Oick Create wnd Shane Adobe PO Adite A SydesO upe iects tere Ding teting 1. (a) A tension test was performed on a magnesium alloy specimen having a diameter 12 mm and gauge 50 mm. The resulting stress-strain diagram is shown figure. Determine the approximate modulus of elastic and the yield strength of the alloy using the 0.2% offset method. (MPa) 280 245 (b) A tension test was performed on a magnesium specimen having a diameter 12 mm and gauge 1ength of 50 mm. The resulting stress-strain diagram is shown in the figure. If the specimen is stressed to 210 MPa and unloaded, determine the permanent elongation of the 210 175 140 specimen 105 70 35 (me 0.002 0.004 0.006 0.008 0.010 ANatesPlease present FBD/s A tensile test is performed on a brass specimen 10mm in diameter using a gage lenght of 50mm. When the tensile load P reaches a valule of 20kN, the distance between the gage marks has increased by 0.122mm. What is the modulus of elasticitiy of the brass?A round aluminum [E = 70000 MPa] rod must be designed for the following specifications: (a) The rod must be 2.09 m long. (b) The rod must carry a tensile load of 647 kN. (c) The normal stress in the rod must not exceed 150 MPa. (d) The rod must not elongate more than 5 mm. Determine the minimum diameter that can be used for the aluminum rod. Answer: Minimum diameter = i mm
- The state of plane stress shown occurs at a critical point of a steel machine component. As a result of several tensile tests, it has been found that the tensile yield strength is o, = 250 MPa for the grade of steel used. Determine the factor of safety with respect to yield using (a) the maximum shearing stress criterion, and (b) the maximum distortion energy criterion. ↑y 40 40 MPa 80 MPa 25 MPa ➜XAn aluminium wire (E=10,600 ksi) having a diameter d=1/8 inch. and length L=14 ft is subjected to a tensile load P. If the maximum permissible elongation of the wire is 1/6 inch and the allowable stress in tension is 10 ksi, what is the allowable load Pmax? Answer in IbsA test piece is cut from a brass bar and subjected to a tensile test. With a load of 6.4 kN the test piece, ofdiameter 11.28 mm, extends by 0.04 mm over a gauge length of 50 mm. Determine:(i) the stress, (ii) the strain, (iii) the modulus of elasticity.(b) A spacer is turned from the same bar. The spacer has a diameter of 28 mm and a length of 250 mm, bothmeasurements being made at 20~ The temperature of the spacer is then increased to 100~ the natural expansionbeing entirely prevented. Taking the coefficient of linear expansion to be 18 x 10-6/~ determine:(i) the stress in the spacer, (ii) the compressive load on the spacer.rC.G.] [64 MN/m 2, 0.0008, 80 GN/m 2, 115.2 MN/m 2, 71 kN.] Could you please answer the parts after the first three? If you use * could you please explain what you mean by it! Thank You :)
- For the stress-strain diagram, which region or point represents strain hardening? 80 (4) (5) 70- (3) (6) 60- (2) 50 - 40 (1) 30- 20 - 10 - 0- Strain O 3 O 4 O 5 O 6 O 2 0 1 Sress (ksi)Q7/ To test the splitting tensile strength (fct), the applied load (p) on the specimen was 150 kN, the tensile strength is..............A high-density polyethelene (HDPE) [E = 780 MPa; v = 0.46] rod has a djameter of 70 mm before load P is applied. In order to maintain certain clearances, the diameter of the rod must not exceed 71 mm when loaded. What is the largest permissible compressive load P that can be applied to the HDPE rod? Answer: P = KN