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Problem 1 A steel bar ABC of diameter D = 40mm subjects to a fluctuated loads F acting at the end of the arm BC is fixed to the wall by four bolts as shown in figure. If the maximum loads $F_{max} = 4i + 16j$ kN that the bar will carry and knowing that $F_{min} = 0.25F_{max}$. Find; a) Find the reactions loads at the fixed support and draw the F.B.D. b) Identify the critical bolt. c) Determine the static ($n_s$) and fatigue ($n_y$) factor of safeties. Note: Choose the diameter of the bolts that are required to handle the bar ABC from class ISO 8.8 to class ISO 12.9

          Problem 1
A steel bar ABC of diameter D = 40mm subjects to
a fluctuated loads F acting at the end of the arm BC
is fixed to the wall by four bolts as shown in figure.
If the maximum loads $F_{max} = 4i + 16j$ kN that the
bar will carry and knowing that $F_{min} = 0.25F_{max}$.
Find;
a) Find the reactions loads at the fixed support
and draw the F.B.D.
b) Identify the critical bolt.
c) Determine the static ($n_s$) and fatigue ($n_y$)
factor of safeties.
Note:
Choose the diameter of the bolts that are required
to handle the bar ABC from class ISO 8.8 to class
ISO 12.9

Show more…

Problem 1
A steel bar ABC of diameter D = 40mm subjects to
a fluctuated loads F acting at the end of the arm BC
is fixed to the wall by four bolts as shown in figure.
If the maximum loads Fmax = 4i + 16j kN that the
bar will carry and knowing that Fmin = 0.25Fmax.
Find;
a) Find the reactions loads at the fixed support
and draw the F.B.D.
b) Identify the critical bolt.
c) Determine the static (ns) and fatigue (ny)
factor of safeties.
Note:
Choose the diameter of the bolts that are required
to handle the bar ABC from class ISO 8.8 to class
ISO 12.9

Added by Theodore M.

Mechanics of Materials

R. C. Hibbeler 9th Edition

Chapter 13

Instant Answer

Solved by Expert Christopher Dzorkpata

Step 1

First, we need to refer to Shigley's book, specifically Chapter 8, Table 8-10, to find the required information for the problem. Show more…

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Text: Use Shigley's book. Chapter 8, Table 8-10. ISO 12.9 Note: Factors of safety. Find and draw the F.B.D. for Problem 1, which involves handling the bar ABC from class ISO 8.8 to class ISO 12.9. Choose the diameter of the bolts that are required. Determine the static factor of safety (ns) and fatigue factor (n). Identify the critical bolt. Find the reaction loads at the fixed support that the bar will carry, knowing that Fmin = 0.25Fmax. If the maximum load Fmax = 4i + 16j kN, and the bar is fixed to the wall by four bolts as shown in the figure, determine the fluctuated loads F acting at the end of the arm BC. A steel bar ABC of diameter D = 40mm is subjected to Fi 0.3m 0.4m.

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