BOLTED CONSTRAINT
BOLTED CONSTRAINT
(OP)
What is the best way to simulate a bolted constraint. Say it is loaded with 3 forces and 3 moments along each axis. The two ways I can think of are
1. If there are 6 bolts on a bolt-circle of dia 6". Then I would constrain a "ring" with outer dia 6.5" and inner dia 5.5" (Depending on the bolt-head dia)
2. Constrain the inner surfaces of the clearance or tapped holes. But this way sometimes I have seen high stresses at the edge of the holes.
Please comment on the above techniques. Thanks
Ahad
1. If there are 6 bolts on a bolt-circle of dia 6". Then I would constrain a "ring" with outer dia 6.5" and inner dia 5.5" (Depending on the bolt-head dia)
2. Constrain the inner surfaces of the clearance or tapped holes. But this way sometimes I have seen high stresses at the edge of the holes.
Please comment on the above techniques. Thanks
Ahad





RE: BOLTED CONSTRAINT
RE: BOLTED CONSTRAINT
1 = over-constraint and unrealistic.
2 = better - and yes you do get high stresses which are not unexpected !
RE: BOLTED CONSTRAINT
johnhors, is case 1 usable if the surface is sandwiched between two plates using bolts. Thanks
Ahad