given that
BHN=410
the general equation relating the BHN and ultimate strength is BHN=3Syt
therefor ultimate strength syt=BHN/3=136.67MPa
12. What is the approximate value of ultimate strength (in MPa) for a cast iron with...
References Tensile strength 450 MPa (65,000 psi) Strain = 0 Stress = 0 MPA Stress = 0 psi 500 1 Strain = 0 Stress = 0 MPA Stress = 0 psi 103 psi 40 MPa 300 Yield strength 250 MPa (36,000 psi) 200 - 30 Stress (MPa) 2001 Stress (10 psi) 100% okuloobs 0.10 0.20 0.30 Strain References Brinell hardness number = 0 BHN Rockwell hardness = ... Rockwell hardness Tensile strength = 0 MPA Tensile strength = 0 ksi...
EXERCISE 1 A cast iron shaft ASTM-25 with an ultimate tensile strength of 25,000 psi, is subjected to a torsional load which is completely reversed. The load is to be applied an indefinite number of cycles. The shaft is 2” in diameter and is joined to a 3" diameter shaft whit a 0.5" radius fillet. The factor of safety is to be 2. What is the maximum torque that can be applied to the shaft? Solve by two ways: 1)...
I. (SI units) Low-carbon steel with tensile strength-300 MPa, shear strength-220 MPa, and Brinell hardness of 225 HB is turned at a cutting speed-2.5 m/s. Feed-0.20 mm/rev and depth of cut- 3.0 mm. Rake angle - 5° in the direction of chip flow. The resulting chip ratio 0.45. Using the orthogonal model to approximate turning, determine (a) cutting force, (b) feed force, and (c) compute the required power, if mechanical efficiency-80%. (30 points) (Hint: correction factor for the volume specific...
I. (SI units) Low-carbon steel with tensile strength-300 MPa, shear strength-220 MPa, and Brinell hardness of 225 HB is turned at a cutting speed-2.5 m/s. Feed-0.20 mm/rev and depth of cut- 3.0 mm. Rake angle - 5° in the direction of chip flow. The resulting chip ratio 0.45. Using the orthogonal model to approximate turning, determine (a) cutting force, (b) feed force, and (c) compute the required power, if mechanical efficiency-80%. (30 points) (Hint: correction factor for the volume specific...
The part shown in the figure has a circular cross-section of 0.04 m diameter. It is made of a steel with a yield strength of 343 MPa and an ultimate strength of 410 MPa, and is subjected to a force, F, of 2500 N. 1. Locate the most critical point. (2 points) 2. Plot the three-dimensional stress element for that point. (2 points) 3. Calculate the values of stresses. (6 points) Fぐ Fぐ
ASTM grade 30 cast iron, Sut = 214 MPa, Suc 752 MPa Fy= 1.2 KN Fx -2.5 KN Fz 3 KN All the dimensions are in millimeters, and due to the fillet radius existing on the shaft the critical point is A Find the factor of safety using Coulomb Mohr failure model. 300 35 380 Fx ASTM grade 30 cast iron, Sut = 214 MPa, Suc 752 MPa Fy= 1.2 KN Fx -2.5 KN Fz 3 KN All the dimensions...
The following data are measurements of tensile strength in MPa (megapascals) and hardness (Rockwell Escale, dimensionlex) for 20 pieces of die-cast alumiinium. A least squares regression line has been fitted and displayed on a scatterplot of the data. Sample Hardness Strength 202 241 00 2 Hardness 53 70 78 SS 51 95 3 4 Sample 11 12 13 14 115 16 117 18 119 S Strength 205 201 262 238 177 183 170 197 223 194 51 71 54 7...
A steel rotating-beam test specimen has an ultimate strength, Sut of 1600 MPa (232 kpsi). Estimate the life of the specimen if it is tested at a completely reversed stress amplitude, Orev, of 900 MPa. Take the value of the fatigue strength fraction, fto be 0.77 The life of the specimen is cycles.
A steel rotating-beam test specimen has an ultimate strength, Sut, of 1600 MPa (232 kpsi). Estimate the life of the specimen if it is tested at a completely reversed stress amplitude, Orey, of 900 MPa. Take the value of the fatigue strength fraction, fto be 0.77 The life of the specimen is cycles.
6. For the cast iron link shown, the largest allowable stresses are 30 MPa in tension and 120 MPa in compression. Determine (a) the largest force P which can be applied, (b) the location of the neutral axis relative to point B. 90 mm A 20 mm P ID P' 40 mm 10 mm B B 10 mm 30 mm Section a-a