Incompatible mesh

[macroguy]

Dear ABAQUS experts,

i have imported an IGES file of the geometry into ABAQUS. The geometry is that of fibers in a matrix block (think SWISS CHEESE). When i mesh this geom, ABAQUS gives elements with no node connectivity when i use HEX elements and when i tried TETS there is connectivity. However, when i apply an outward Pressure on any face, the fibers seem to peel off from the matrix block. Its clear that Nodes are not being merged at the fiber-matrix interface. I think these duplicate nodes can be merged: so
1) can anybody tell me how?
2) why is mesh not compatible between the matrix and fiber region, how can this be fixed.

 

[corus]

It's better to use one type of meshing, ie either hex or tets. If a combination of meshing types is made then the two surfaces between the partitions will be tied and the results at the interface will appear uneven. When meshing the user will asked if the surfaces should be tied. If they're not tied then the surfaces will obviously separate under load. You can merge nodes but this may give worse results than tieing surfaces together as the distance between nodes may exceed the limits you set, effectively leaving holes in the model. If the mesh isn't compatible and you can't achieve structured or swept regions throughout, then it's better to just use quadrilateral tet elements everywhere.

corus