what BC's should I apply?
what BC's should I apply?
(OP)
I have a spherical thin film supported by a ring at film's
circumference. When I cool the system to an uniform temperature, intuitively it seems to me that both the ring & film should shrink together if CTE of film is same as that of the ring. In other words, it would be a sphere of smaller radius after cooling. My question is how do I model the boundary conditions for this problem without any rigid body motion?
I would really appreciate your thoughts on this.
Thank you.
circumference. When I cool the system to an uniform temperature, intuitively it seems to me that both the ring & film should shrink together if CTE of film is same as that of the ring. In other words, it would be a sphere of smaller radius after cooling. My question is how do I model the boundary conditions for this problem without any rigid body motion?
I would really appreciate your thoughts on this.
Thank you.





RE: what BC's should I apply?
RE: what BC's should I apply?
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RE: what BC's should I apply?
It is only if your restaints are not statically determinate that you NEED to use weak springs. (There are circumstances under which it is not possible to use a statically determinate set of restraints.)
Either way, at the end of the analysis the very first thing you should check is that you have zero forces in all components of your restraining system.
RE: what BC's should I apply?
Although any restraint with give you a reaction force, however small. The trick however is to reduce this reaction to as small a value as possible, and obviously one in which the response of the system becomes unaffected.
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RE: what BC's should I apply?
RE: what BC's should I apply?
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