Answered: Most common reasons for bolt fracture…

Most common reasons for bolt fracture in flange connection bolts in wind turbines, M56, 10.9 32CrB4 steel. Fracture occourd right bellow the bolt head. If you got sources, please add them.

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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Determine the yield strength sy and the ultimate strength su of the A36 steel either from Materials Science class book/notes, or by researching over the internet.
4. A beam has fluctuating bending moment and is not rotating. The bending moment has a maximum of 1kNm and a minimum of 100kNm. The beam is made of AISI1020CD steel with a square cross section. There are no stress concentrations. a. Determine the fully corrected endurance limit as a function of the cross section (cross section unknown) b. Determine the required size for a factor of safety of 2 using the Gerber Fatigue Failure Theory
A rectangular bar is cut from an AISI 1020 cold-drawn steel flat. The bar is 2.500 in wide by 4/8 in thick and has a 0.500-in-dia. hole drilled through the center as depicted in Table A-15-1. The bar is concentrically loaded in push-pull fatigue by axial forces Fa, uniformly distributed across the width. Using a design factor of na = 2, estimate the largest force Fa that can be applied ignoring column action. What is the largest force that can be applied to the part? (Round the final answer to three decimal places.) The largest force that can be applied is kips.
! Required information A rectangular bar is cut from an AISI 1020 cold-drawn steel flat. The bar is 2.500 in wide by 4/8 in thick and has a 0.500-in-dia. hole drilled through the center as depicted in Table A-15-1. The bar is concentrically loaded in push-pull fatigue by axial forces Fa, uniformly distributed across the width. Using a design factor of na = 2, estimate the largest force Fã that can be applied ignoring column action. Determine the endurance limit for this material as well as the value after correction for surface finish, sizing, and loading. The endurance limit for the material is kpsi. The endurance limit after correction is kpsi.
A rectangular bar is cut from an AISI 1020 cold-drawn steel flat. The bar is 2.500 in wide by 4/8 in thick and has a 0.500-in-dia. hole drilled through the center as depicted in Table A-15–1. The bar is concentrically loaded in push-pull fatigue by axial forces Fa, uniformly distributed across the width. Using a design factor of na = 2, estimate the largest force Fa that can be applied ignoring column action. What are the values of the theoretical stress-concentration factor, the notch sensitivity, and the fatigue stress-concentration factor? The value of the theoretical stress-concentration factor is The value of the notch sensitivity is (Round the final answer to three decimal places.) The value of the fatigue stress-concentration factor is (Round the final answer to three decimal places.)
Required information A shaft is loaded in bending and torsion such that M₂ = 66 N-m, T₂ = 42.496 N-m, Mm = 51.858 N-m, and Tm - 33 N-m. For the shaft, Su = 700 MPa and Sy=560 MPa, the true fracture strength is 1045 MPa, and a fully corrected endurance limit of S₂ = 210 MPa is assumed. Let Kf= 2.2 and Kfs=1.8. With a design factor of 2.0, determine the minimum acceptable diameter of the shaft using the methods mentioned in the subsection. Determine the minimum acceptable diameter of the shaft using the DE-Morrow criterion. The diameter of the shaft is mm.
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9. A M42x4.5 Grade 10.9 bolt 60 cm in length is loaded to 85% of its proof strength. The bolt is not lubricated, though traces of lubrication may be present. What is the required torque, deformation, and torque angle? The modulus of elasticity is E= 207 x 10' N/m. Use 830 MPa as proof strength.
Required information A shaft is loaded in bending and torsion such that Ma= 66 Nm, Ta=42.496 N.m, Mm = 51.858 N.m, and Tm = 33 N-m. For the shaft, Su = 700 MPa and Sy=560 MPa, the true fracture strength is 1045 MPa, and a fully corrected endurance limit of Se = 210 MPa is assumed. Let Kf= 2.2 and Kfs=1.8. With a design factor of 2.0, determine the minimum acceptable diameter of the shaft using the methods mentioned in the subsection. Determine the minimum acceptable diameter of the shaft using the DE-Morrow criterion. The diameter of the shaft is 27.16 mm.
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