flyerfly
Mechanical
- Apr 5, 2006
- 23
I tried doing a verification model (simply supported beam) today with a composite sandwich and got very different results. Any thoughts?
Method 1: All solid elements were used for both the thick core material and the laminate. The material properties for the core is isotropic (foam) and the laminate is orthotropic. The problem with this is that meshing is poor for such a thin laminate compared to the core.
Method 2: Core was made with solid elements and laminate was done with shell elements (mid plane extraction from above model). The results between the two methods are drastically different (about 5.75x different!).
The deflection with the all solid elements was alot less then that of the shell+solid configuration. I am trying to figure out why and can't think of the reason so far. I would very much appreciate any insight into this.
Thanks!
Method 1: All solid elements were used for both the thick core material and the laminate. The material properties for the core is isotropic (foam) and the laminate is orthotropic. The problem with this is that meshing is poor for such a thin laminate compared to the core.
Method 2: Core was made with solid elements and laminate was done with shell elements (mid plane extraction from above model). The results between the two methods are drastically different (about 5.75x different!).
The deflection with the all solid elements was alot less then that of the shell+solid configuration. I am trying to figure out why and can't think of the reason so far. I would very much appreciate any insight into this.
Thanks!