محاكاة لوصلة ربط البراغي تحت تأثير قوة شد أحادية و عوامل متغيرة

Abstract EN

This research aims to simulate preloaded bolted joint made of steel by finite element method (FEM) by studying the structural response of bolted joint.

The bolted joint is made up of two pieces shaped L , each piece is made up of vertical section fixed with horizontal section by Edge Weld method ,weld size is (5mm) and they link by bolt (M30*3.5) ,it has been confirmed from weld size by using features (Weld Check Plot) and ( Pin/bolt Check) in Solid work Simulation to find out the accuracy of design result.Designed a widget on the maximum tensile strength unilateral exposed it the link to ward the top on the first piece of (20 KN) has been installed the second piece from the bottom.

In this research were studied torque pre-pregnancy bolt or (pre tensions torque) with different values (588,882,1225) N.m on the structural response of the connection link, the study showed that the increase in pre-pregnancy bolt lead to a decrease in displacement between the end edges of the link-prone external download and installation and this confirms the increase in pre-pregnancy bolt increases the pressure on the two pieces and thus an increase in power to install and link connectivity and prevent its separation from each other.

As it has been the study of stress and strain on the surface of the link connectivity and showed that the increase of pre-pregnancy screw increases stress especially in the vicinity of slot screw areas and emotions, either friction forces (Contact / Friction) between the bolt and the surface of the interface in contact with him becoming more and increase the pre-load of the bolt, as well as broad this research impact of increased pre-pregnancy to bolt the welding area, which accounted for as (Beam) where increasing stress the welding area, but not for large have been clarified all the forces acting on the welding area mentioned in the tables.Finally, research the reliability of simulation program , the analytical Solidwork Simulation, which contains many features recommended the designer can simulate complex models with high speed and accuracy.