Analysis on Bending Property of Mechanical Composited Tube

In this article,it carried out bending and buckling analysis to Ф219 mm×(14.3+3)mm mechanical composited tube by finite elements software,the result showed that lining wrinkle is the principal failure mode for buckling;through simulating the bonding interface by adding interference within finite elements,it also conducted bending analysis on composited tube with different interference amounts,the result indicated that adopting interference fit can simulate bonding interface well,the interference amount is bigger,and the bond strength and the resistance to bending is higher.In the end,it analyzed the effect of lining tube thickness to the bending resistance of composited tube,the result demonstrated that adding the lining thickness can increase the bending resistance to composited tube obviously;it conducted bending failure analysis by adding welding spot in finite element model,the result indicated that adding welding spot cannot eliminate the phenomenon of lining wrinkles,by contrast,the bending resistance of composited tube will be decreased when the welding interval is in certain extent.