Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
10th Edition
ISBN: 9780073398204
Author: Richard G Budynas, Keith J Nisbett
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 5, Problem 25P
5-21 to 5-25 For an ASTM 30 cast iron, (a) find the factors of safety using the BCM and MM theories. (b) plot the failure diagrams in the σA. σB plane to scale and locate the coordinates of the stress state, and (c) estimate the factors of safety from the two theories by graphical measurements along the load line.
Problem Number | σx (kpsi) | σy (kpsi) | Txy (kpSi) |
5–21 | 15 | 10 | 0 |
5–22 | 15 | −50 | 0 |
5–23 | 15 | 0 | −10 |
5–24 | −10 | −25 | −10 |
5–25 | −35 | 13 | −10 |
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1. An AISI 1018 steel has a yield strength, Sy = 295 MPa. Using the distortion energy theory for
the plane stress state ox = -30 MPs, Oy = -65 MPa, and Txy = 40 MPa.
1) Determine the factor of safety.
2) Plot the safety envelope of the material.
3) Plot the load line.
4) Estimate the factor of safety by graphical method (refer to 4-1 Ductile Failure I, P10).
Required information
The cold-drawn AISI 1040 steel bar shown in the figure is subjected to an axial load that fluctuates from 8 kN to 30 kN.
Use the Modified Goodman criterion and estimate the fatigue factor of safety based on achieving infinite life and the
yielding factor of safety.
25 mm
10mm
-6-mm D.
What is the number of cycles to failure for this part?
The number of cycles is 120000
1) Find the factor of fatigue safety using Goodman failure criterion
Chapter 5 Solutions
Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
Ch. 5 - A ductile hot-rolled steel bar has a minimum yield...Ch. 5 - A ductile hot-rolled steel bar has a minimum yield...Ch. 5 - A ductile hot-rolled steel bar has a minimum yield...Ch. 5 - A ductile hot-rolled steel bar has a minimum yield...Ch. 5 - A ductile hot-rolled steel bar has a minimum yield...Ch. 5 - Prob. 6PCh. 5 - 5-7 to 5-11 An AISI 1018 steel has a yield...Ch. 5 - 5-7 to 5-11 An AISI 1018 steel has a yield...Ch. 5 - 5-7 to 5-11 An AISI 1018 steel has a yield...Ch. 5 - 5-7 to 5-11 An AISI 1018 steel has a yield...
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