+1.0,63 finr= 0.051PThe stepped rod in sketch is subjected to a tensileforce that varies between 4000 and 7000 lb. Therod has a machined surface finish everywhere exceptthe shoulder area,where a grinding operation hasbeen performed to improve the fatigue resistanceof the rod. Using a 99% probability of survival,determine the safety factor for infinite life ifthe rod is made of AISI 1080 steel, quenchedand tempered at 800°c Use the Goodman line.Does the part fail at the fillet? Explain

Answered: +1. 0,63 fin r= 0.051 P The stepped rod…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Parvin bhai
An electric car manufacturer is looking to utilize some stock AISI 8740, hot rolled steel bars that are around 2 inches in diameter for their conveyor system that is being set up to start producing their own batteries. The data sheet shows the the bars to have 132,000 psi tensile strength, 87,500 psi yield strength, and 16.7% elongation. A hardness of 262 Bhn allows it to be finish machined after heat treatment. They keep their workspace at 70°F. What is the working endurance strength, Se? 39,750 psi 28,562 psi 42,500 psi 33,400 psi
I've got 38.35 and 34.3 please help me verify
Problems 1. A Rockwell hardness measurement is made on a ductile iron (80-55-06 as cast) and the obtained Rockwell hardness R scale is 13 HRC. Predict the tensile and yield strengths of this material. 2. A Brinell hardness measurement is made on a ductile iron (120-90-02, Oil-quenched) using a 10-mm-diameter sphere of tungsten carbide. A load of 3,000 kg produces a 3.52-mm- diameter impression in the iron surface. a. Calculate the BHN of this alloy. (The correct units for the Brinell equation are kilograms for load and millimeters for diameters.) b. Predict the tensile and yield strengths 3. Suppose that a ductile iron (100-70-03, air-quenched) has a tensile strength of 800 MPa. What diameter impression would you expect the 3,000-kg load to produce with the 10-mm- diameter ball? Search LO W SE
A 20-mm-diameter shaft with a 6-mm-diameter transverse hole is made of_ cold- drawn steel having Su hole have a machined finish. Estimate the safety factor with respect to infinite fatigue life for (a) torque fluctuations between 0 and 100 N•m, (b) a completely reversed torque of 50 N •m, and (c) a mean torque of 60 N•m plus a superimposed alternat- ing torque of 40 N •m. 8.37 = 550 MPa and S, = 462 MPa. Surfaces in the vicinity of the [Ans.: 1.5, 1.9, 1.7]
Two steels are being considered for manufacture of as-forged connecting rods. One is AISI 4340 Cr-Mo-Ni steel capable of being heat-treated to a tensile strength of 260 kpsi. The other is a plain carbon steel AISI 1040 with an attainable Sut of 113 kpsi. If each rod is to have a size giving an equivalent diameter d of 0.75 in, is there any advantage to using the alloy steel for this fatigue application?
A 2.0-inch diameter 4140 steel bar is austenized and tempered in oil without Agitation, determine the resulting hardness at 0.6 inches below the surface, present all the Procedure to arrive at the answer (include sketch of the piece and graph used with steps Using word forms)
MECH.ENG. DESIGN 1 PART 2
A flat-rolling operation of 250 mm wide alloy stee Calculate roll torque
QUESTION 12 What is the safety factor against yielding of a 4140 steel shaft, 2.2 in OD, 0.45 inch wall thickness, quenched and tempered at 1000FF, subject to a torsion of 10866 in-Ibf and a compressive load of 10982 ibf? (Use Shigley for material properties, and the most accurate failure theory appropriate to the material.) QUESTION 13 A 1.62 m long rectangular AISI 1020 cold rolled steel bar (10 mm x 25 mm) is subject to a torsional load of 47.9 Nm. What is the safety factor against yielding? (Use Shigley for material properties.)
Tensile and fully reversed loading fatigue tests were conducted for a certain steel alloy and revealed the tensile strength and endurance limit to be 1200 and 550 MPa, respectively. If a rod of this material supply were subjected to a static stress of 600 MPa and oscillating stresses whose total range was 700 MPa, would you expect the rod to fail by fatigue processes? Hint: You may want to plot a diagram to aid in presenting your answer.
(a) A bar AISI 1035 steel forged and heat treated with minimum yield strength of _MPa is subjected to bending moment of _Nm and a torsional moment of Nm. Assuming a factor of safety of 2, determinethe diameter of rod using thefollowing theories of failure(i) Maximum Shear stress theory and (ii) Distortion Energy theory (ii) Maximumstresstheory, alsospecifywhich diameter is considered as safe yield strength = 555MPA bending moment = 285NM torsional moment = 315Nm

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