How to bond two surfaces of two solids together?
How to bond two surfaces of two solids together?
(OP)
Does PATRAN/NASTRAN have the capability to bond two surfaces of two solids together?
I tried to model an assembly consisting of two parts. The two parts share one surface. How can I glue these two together in order to obtain same nodes and mesh at the bonded surface?
I tried to model an assembly consisting of two parts. The two parts share one surface. How can I glue these two together in order to obtain same nodes and mesh at the bonded surface?





RE: How to bond two surfaces of two solids together?
Cheers
Greg Locock
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RE: How to bond two surfaces of two solids together?
Using cweld you don't need to have coincident grid points
RE: How to bond two surfaces of two solids together?
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: How to bond two surfaces of two solids together?
In case you can use the Cfast, that allow for a defined stiffness in the connection.
In any case. I've never run a comparison between different method:
coincident grid point
cweld
cfast
will be nice if somebody have data on this.
RE: How to bond two surfaces of two solids together?
It sounds that the following methods can be used to bond two surfaces:
1.merge coincident nodes
2. CWELD connection
3. CFAST connection
4. RBE3 (someone suggest me this method)
All these ways need manual creation of grid points at the surfaces. I was wondering if I can "glue" two surfaces of two solids to one surface. When I mesh two solids, they have the same mesh at the bonded surface.
RE: How to bond two surfaces of two solids together?
You can glue two solid if you use MD nastran, not 'normal' nastran.
With MD nastran you can define two surface to be glued.
I can't say much more because I didn't use it.
RE: How to bond two surfaces of two solids together?
Thank you, Onda.
I don't have MD Nastran. I'll check about that.
RE: How to bond two surfaces of two solids together?
The clasical method I prefer is simply merging coincident nodes: if coincident solid faces has different area, then simply imprint one face in another and make sure you have exactly the same mesh in both faces, mesh your assembly with 3D solid elements and merge coincident nodes, simply!.
Best regards,
Blas.
RE: How to bond two surfaces of two solids together?
Thanks for the reply.
It is not easy to create many RBE3 manually. To make same mesh at both surface of solids might not be applicable to two solids.
I just found out that there is a contact option in PATRAN Load/BC. But the input file can only be solved by MD NASTRAN, not regular NASTRAN.