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Tensile stress area of a bolt

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Edward Chang

The document discusses how SolidWorks calculates the tensile stress area of a bolt for structural analysis. It defines tensile stress area as the minimum cross-sectional area of the threaded section of a bolt. The formula used to calculate this area takes into account the bolt's nominal diameter and pitch. It provides the specific formulas and nominal values for ISO metric bolt threads and ANSI bolt threads.

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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 About Learning Resources My.SolidWorks Subscription Services  > Simulation > Loads and Restraints > Connectors > Bolt Connectors > Tensile Stress Area of a Bolt Search SOLIDWORKS Help Introduction Administration User Interface SolidWorks Fundamentals Moving from 2D to 3D Assemblies CircuitWorks Configurations SolidWorks Costing Design Checker Design Studies in SolidWorks Detailing and Drawings DFMXpress DriveWorksXpress FloXpress Import and Export Model Display Mold Design Motion Studies Parts and Features Routing Sheet Metal Simulation Welcome to SolidWorks Simulation Help Accessing and Using Help Legal Notices SolidWorks Simulation Reference SolidWorks Simulation Fundamentals Analysis Background Simulation Options Tensile Stress Area of a Bolt When you select Calculated tensile stress area (Connector­Bolt PropertyManager), the program calculates the tensile stress area (At), which is the mimimum area of the threaded section of the bolt, according to the formula: At = [(d3 + d2) / 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 d3 = d ­ 1.2268 * P d2 = d ­ 0.6495 * P The formula for the tensile stress area becomes: At = 0.7854 * [d ­ (0.9382 * P)]2 Substituting P = 1 / n results to At = 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     
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 Submodeling Studies Design Studies 2D Simplification Studies Composite Shells Loads and Restraints Directional Loads and Restraints Split Splitting a Face (Split Tab) Fixtures Structural Loads Connectors Summary of Connectors Pin/Bolt Check box Bolt Connectors Connector ­ Bolt Tensile Stress Area of a Bolt Example of a Tight Fit Bolt Connector Bolt Connectors ­ Formulation Definition of Friction Factor Bolt Connector Pre­Load Thermal Effects for Bolt Connectors Pin Connectors Spring Connectors Bearing Connectors Between Parts Edge Weld Connector Connector ­ Spot Welds Connector ­ Rigid Connector ­ Link Connector ­ Elastic Support Thermal Loads and Restraints Function Curves Background on Meshing Meshing with Contact Simulation Materials Parameters Analysis Library Features Viewing Analysis Results Study Reports Factor of Safety Check Search 'Tensile Stress Area of a Bolt' in the SOLIDWORKS Knowledge Ba 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: At = 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
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 SimulationXpress Sketching Sustainability Products SolidWorks Utilities Tolerancing TolAnalyst Toolbox Weldments Workgroup PDM Troubleshooting Glossary Terms of Use | Cookies of Use  | Get a Product Demo  | Contact Sales  | Get a Quote  © 1995­2017 Dassault Systèmes. All rights reserved.

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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 About Learning Resources My.SolidWorks Subscription Services  > Simulation > Loads and Restraints > Connectors > Bolt Connectors > Tensile Stress Area of a Bolt Search SOLIDWORKS Help Introduction Administration User Interface SolidWorks Fundamentals Moving from 2D to 3D Assemblies CircuitWorks Configurations SolidWorks Costing Design Checker Design Studies in SolidWorks Detailing and Drawings DFMXpress DriveWorksXpress FloXpress Import and Export Model Display Mold Design Motion Studies Parts and Features Routing Sheet Metal Simulation Welcome to SolidWorks Simulation Help Accessing and Using Help Legal Notices SolidWorks Simulation Reference SolidWorks Simulation Fundamentals Analysis Background Simulation Options Tensile Stress Area of a Bolt When you select Calculated tensile stress area (Connector­Bolt PropertyManager), the program calculates the tensile stress area (At), which is the mimimum area of the threaded section of the bolt, according to the formula: At = [(d3 + d2) / 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 d3 = d ­ 1.2268 * P d2 = d ­ 0.6495 * P The formula for the tensile stress area becomes: At = 0.7854 * [d ­ (0.9382 * P)]2 Substituting P = 1 / n results to At = 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 Submodeling Studies Design Studies 2D Simplification Studies Composite Shells Loads and Restraints Directional Loads and Restraints Split Splitting a Face (Split Tab) Fixtures Structural Loads Connectors Summary of Connectors Pin/Bolt Check box Bolt Connectors Connector ­ Bolt Tensile Stress Area of a Bolt Example of a Tight Fit Bolt Connector Bolt Connectors ­ Formulation Definition of Friction Factor Bolt Connector Pre­Load Thermal Effects for Bolt Connectors Pin Connectors Spring Connectors Bearing Connectors Between Parts Edge Weld Connector Connector ­ Spot Welds Connector ­ Rigid Connector ­ Link Connector ­ Elastic Support Thermal Loads and Restraints Function Curves Background on Meshing Meshing with Contact Simulation Materials Parameters Analysis Library Features Viewing Analysis Results Study Reports Factor of Safety Check Search 'Tensile Stress Area of a Bolt' in the SOLIDWORKS Knowledge Ba 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: At = 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 SimulationXpress Sketching Sustainability Products SolidWorks Utilities Tolerancing TolAnalyst Toolbox Weldments Workgroup PDM Troubleshooting Glossary Terms of Use | Cookies of Use  | Get a Product Demo  | Contact Sales  | Get a Quote  © 1995­2017 Dassault Systèmes. All rights reserved.