Can someone give me an example or and idea of where to find this information? Values for Ar and Ats can be found in appendix H. This will be used on a through bolted flange.
Bolt Stress (Sb): This would typically be based on the preload applied to the bolt. If you are aiming for a certain clamping force, this can be determined by dividing the preload force by the tensile stress area of the bolt.
Effective Length (L eff): This is the length of the bolt that will experience the stretching force, typically the grip length in a through-bolted connection (distance from the head to the nut or flange interface).
Young's Modulus (E): This is a material property, which can be found in tables or materials handbooks for common bolt materials (e.g., 210 GPa for steel).
Reduced Area (A r) and Tensile Stress Area (A ts): These values can be found in Appendix H of the relevant standards (like ASME or other bolt design standards), which often include tables of these areas based on bolt diameter and thread specifications. The tensile stress area A ts is often given for standard thread sizes and is used to calculate the force that can be applied based on bolt strength.
Finding Values for A r and Ats:
1. Appendix H of ASME BPVC (or similar standards): For standard flanges and bolt calculations, Appendix H of the ASME Boiler and Pressure Vessel Code provides values for Ar and Ats
These areas are often tabulated based on bolt sizes and thread characteristics, which can vary depending on the bolt class and standard (e.g., ASME B16.5 for flanges or ASTM standards for bolt material).
2. ASME B18.2.1 and B18.2.2: These standards provide specifications for bolt and nut dimensions, which you can use to identify tensile stress areas.
3. Handbooks: Engineering handbooks like the Machinery's Handbook often provide detailed tables for bolt areas based on standard sizes and thread pitches.
