Tensile stress area of a bolt

Tensile stress area of a bolt

1. 11/26/2017 2013 SOLIDWORKS Help ‐ Tensile Stress Area of a Bolt
http://help.solidworks.com/2013/english/SolidWorks/cworks/r_Tensile_Stress_Area_Bolt.htm 1/3 AboutLearning ResourcesMy.SolidWorksSubscription Services
 > Simulation > Loads and Restraints > Connectors > Bolt Connectors > Tensile Stress Area of a
Bolt
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Tensile Stress Area
of a Bolt
When you select Calculated tensile
stress area (Connector­Bolt
PropertyManager), the program
calculates the tensile stress area
(A
t
), which is the mimimum area of
the threaded section of the bolt,
according to the formula: A
t
 = [(d
3
 +
d
2
) / 2)]
2
 * π /4
P = pitch, axial distance
between two adjacent threads
n = 1 / P, number of bolt threads
per inch (ANSI) or millimeter
(ISO)
d = nominal bolt shank diameter
ISO Bolt threads
d
3
 = d ­ 1.2268 * P
d
2
 = d ­ 0.6495 * P
The formula for the tensile stress
area becomes: A
t
 = 0.7854 * [d ­
(0.9382 * P)]
2
Substituting P = 1 / n results to A
t
 =
0.7854 * [d ­ (0.9382 / n)]
2
, where d
PARENT TOPIC
Bolt Connectors
RELATED CONCEPTS
Example of a Tight Fit Bolt
Connector
Bolt Connectors ­
Formulation
Thermal Effects for Bolt
Connectors
RELATED REFERENCE
Connector ­ Bolt
Definition of Friction Factor
Bolt Connector Pre­Load
Other versions:2013   |  Print |  Feedback on this topic  
 

2. 11/26/2017 2013 SOLIDWORKS Help ‐ Tensile Stress Area of a Bolt
http://help.solidworks.com/2013/english/SolidWorks/cworks/r_Tensile_Stress_Area_Bolt.htm 2/3 Simulation Studies
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Tensile Stress Area of a Bolt
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Search 'Tensile Stress Area of a Bolt' in the SOLIDWORKS Knowledge Base.
is given in mm, and n is given in
threads/mm.
ANSI threads
A similar approach is followed for the
calculation of the tensile stress area:
A
t
 = 0.7854 * [d ­ (0.9743 / n)]
2
,
where d is given in inches, and n is
given in threads/inch.
Reference: Machinery's Handbook
published by Industrial Press.
The table below provides the nominal
bolt diameter and pitch values for the
main ISO M large thread bolts.
Table 1. ISO M Metric Bolt Threads,
ISO 724 (DIN 13 T1)
Nominal Diameter d
(mm)
Pitch P
(mm)
M 1.60 0.35
M 2.00 0.40
M 2.20 0.45
M 3.00 0.50
M 4.00 0.70
M 4.50 0.75
M 5.00 0.80
M 6.00 1.00
M 8.00 1.25
M 10.00 1.50
M 12.00 1.75
M 16.00 2.00
M 20.00 2.50
M 24.00 3.00
M 30.00 3.50
M 36.00 4.00
M 42.00 4.50
M 48.00 5.00
M 56.00 5.50
M 64.00 6.00

3. 11/26/2017 2013 SOLIDWORKS Help ‐ Tensile Stress Area of a Bolt
http://help.solidworks.com/2013/english/SolidWorks/cworks/r_Tensile_Stress_Area_Bolt.htm 3/3 114.108
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