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Subject: Re: Intersection of two plates
Author: Christopher Wright
Date: 1970-01-01 00:59:00

>First the general FE question:
>Do I indeed need to model this intersection in this way or should I have
>taken the easy way of generating one line of nodes at the intersection
>lines of the mid-planes of the two plates?
I doubt there will be a significant difference for engineering
purposes--I've done it both ways. Either way you establish the necessary
continuity across the joint, which is only half the plate thickness
anyway; the load distribution another thickness or so away will be the
same in any event (St Venant effect). You'll get good secondary stress
and weld loading provided your mesh is fine enough at the joint.

Nearer than that the actual stress state is three dimensional and
strongly affected by weld contour, residual stress, alignment, lammellar
tearing susceptibility and other real world effects you have no way of
dealing with precisely. If you need peak stress, you can do a 3D model of
the joint and finesse all the real world effects above or you can
estimate the fatigue life of the joint from published work on welds. If
it were me, I'd pick the latter.

>Second the ANSYS related question.
>To generate the CE's for nodes on the two lines I have mede two macro's.
Seems to me like you can make a macro to pick the master nodes one one
side of the joint one by one, then select the nearest node to a given
master on the other side of the joint and slave it using the CERIG
command. I don't think I'd try generating my own CE relationships.

Christopher Wright P.E. |"They couldn't hit an elephant from
chrisw@s... | this distance" (last words of Gen.
___________________________| John Sedgwick, Spotsylvania 1864)
http://www.skypoint.com/~chrisw

Posts possibly associated with message #245AuthorDateScore
235Intersection of two platesGuus Janssen1999/01/15 
236Re: Intersection of two platesPavel Manas1999/01/15 
239Re: Intersection of two platesJan Christian Anker1999/01/15 
240Re: Intersection of two platesGuus Janssen1999/01/15 
245Re: Intersection of two platesChristopher Wright1970/01/01