3. Direct tension indicators are sometimes used instead of torque wrenches to ensure that a bolt has a prescribed tension when used for connections. If a nut on the bolt is tightened so that the six 3-mm high heads of the indicator are strained 0.1 mm/mm, and leave a contact area on each head of 1.5 mm², determine the tension in the bolt shank. The stress-strain diagram of the indicator material (and bolt) is shown.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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3. Direct tension indicators are sometimes used instead of torque
wrenches to ensure that a bolt has a prescribed tension when
used for connections. If a nut on the bolt is tightened so that the
six 3-mm high heads of the indicator are strained 0.1 mm/mm,
and leave a contact area on each head of 1.5 mm², determine the
tension in the bolt shank. The stress-strain diagram of the
indicator material (and bolt) is shown.
3 mm
1
σ (MPa)
600
450
0.0015
0.3
€ (mm/mm)
Transcribed Image Text:3. Direct tension indicators are sometimes used instead of torque wrenches to ensure that a bolt has a prescribed tension when used for connections. If a nut on the bolt is tightened so that the six 3-mm high heads of the indicator are strained 0.1 mm/mm, and leave a contact area on each head of 1.5 mm², determine the tension in the bolt shank. The stress-strain diagram of the indicator material (and bolt) is shown. 3 mm 1 σ (MPa) 600 450 0.0015 0.3 € (mm/mm)
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