The mechanical properties and calculation methods of ordinary bolts and high strength bolts are different

       The mechanical properties and calculation methods of ordinary bolts and high strength bolts are different. The high strength bolt bears the external load by exerting pre tension P in its interior, and then produces friction resistance on the contact surface of the connected parts, while the ordinary bolt bears the external load directly.

       High strength bolt connection has the advantages of simple construction, good mechanical performance, replaceable, fatigue resistance, and no loosening under dynamic load. It is a promising connection method.