Shaft A shown below is made from AISI 1020 hot rolled steel and is welded to the wall and is subjected to loading by equal and opposite forces via shaft B. The .125 in weld produces a theoretical stress concentration factor Kts = 1.6. If Shaft A is 2 ft long (from the fixed support to shaft B) and the load F cycles from 150 to 500#, determine if the shaft has infinite fatigue life using the modified Goodman criteria. If not, determine the number of cycles to failure. in fillet Shaft A 8 -in dia F 1 in 1 in Shaft B

Te - Effective throat thickness well in mm = 6 sin45° Consider the following drawing in which plate 1 is welded onto plate 2 as shown for tensile and shear loading. The plates are fillet welded with a weld thickness of 6 mm as shown for a length of 150 mm.   The plates have an ultimate strength of 275 MPa and the welding was done with F70 welding electrodes, which possesses an ultimate strength of 483 MPa.   Consider a partial factor of safety of 1.7 for the welded joint and determine the design strength of the weld joint, both in tension (Tdw) and in shear (Vdw) due to the forces acting on it.   a)      Determine the design strength of the following weld in tension ( ) due to vertical forces. b)      Determine the design strength of the weld in shear ( ) due to horizontal forces.   Attached pic is shear equation for calculation Tension equation for calculation is: Tdw = FyLwte /Ymw

A solid square rod is cantilevered at one end. The rod is 0.8 m long and supports a completely reversing transverse load at the other end of 50 kN. The material is AISI 1060 hot-rolled steel (sy = 370 MPa, Su = 680 MPa). Use a design factor of 2 and determine the dimensions of the square cross section for the following cases. Consider all possible endurance limit modifying factors. Neglect any stress concentration. a. The rod must support this load for 100 cycles.

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?

Two steels are being considered for manufacture of as-forged connecting rods subjected to bending loads. One is AISI 4340 Cr-Mo-Ni steel capable of being heat-treated to a tensile strength of 260 ksi. The other is a plain carbon steel AISI 1040 with a ultimate strength of 113 ksi. Each rod is to have a size giving an equivalent diameter of 0.75 in. Determine the endurance limit for each material. Is there any advantage to using the alloy steel for this fatigue application?

(b) A static load of 30 kN is applied at the cantilevered beam as shown in the Figure 3.1. The cantilever is made of AISI 1018 HR steel (S, = 220 MPa) and welded with h = 10 mm fillet weld. As a design engineer, you are responsible to determine the factor of safety based on distortion-energy criterion as to make sure the weldment is in safe condition. All dimensions are in millimeters 70 50 200 F Figure 3.1: Welded cantilevered beam

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.)

A 15 mm diameter nonrotating round bar is made of AISI 1050 cold-drawn steel and has a 3-mm diameter hole drilled transversely through it. This bar is target to have reliability of 90 percent and subject to a fluctuating bending load. It will use in operating environment of 420 degree Celsius. Y=2,   T=420  a) Determine the endurance limits, Se for the steel bar? (MPa) Yield strength; Sy (MPa) Tensile strength; Sut (MPa) Surface factor; ka Size modification factor; kb Load modification factor; kc  Temperature modification factor; kd Reliability factor; ke Miscellaneous effect modification factor; kf Endurance limits, Se (MPa) b) because this bar has a discontinuity geometry, compute the fatigue stress concentration factor; Kf. notch sensitivity; 'q'  Theoretical stress concentration factor at hole; 'Kt'  Fatigue stress concentration factor at hole; 'Kf'  c) calculate modified Goodman factor of safety if this part is design to withstand a fluctuating bending load varying from 20 to 40…

A solid round bar with diameter of 50.800 mm has a groove cut to a diameter of 45.720 mm, with a radius of 2.540 mm. The bar is not rotating. The bar is loaded with a repeated bending load that causes the bending moment at the groove to fluctuate between 0 and 2825.000 N m. The bar is hot-rolled AISI 1095, but the groove has been machined. Determine the factor of safety for fatigue based on infinite life using the Goodman criterion, and the factor of safety for yielding.

Calculate the elustic limit of the plate 10 plate 8X0 - S00 pounds of load material 6061 Aluminum - Determine whattypeof stress is acting at this point -calculate the magnitude of this stress