Interface technology for geometrically nonlinear analysis of multiple connected subdomains

Application of interface technology in nonlinear analysis of a stitched/RFI composite wing stub box

“…The transition mesh is eliminated in the interface technology model shown in Figure 8. The refined region is directly connected to the coarse region using interface elements 4,5 as discussed in the Appendix.…”

“…An arclength control strategy 17,18,19 is used for automatic load incremental control to obtain the load-deflection response and to handle limit points. This nonlinear solution strategy has been adapted to incorporate the interface element 5 and was implemented within a general-purpose, finite element code COMET/AR.…”

“…The objective of this paper is to apply the interface technology in a geometrically nonlinear analysis of the McDonnell Douglas wing-stub-box test article using a procedure recently developed by Ransom. 5 Finite element analysis results from the interface technology model are compared herein with NASTRAN results 2 and with experimental data. 8…”

A penalty-based interface technology for coupling independently modeled 3D finite element meshes

“…The finite element interface technology developed at NASA LaRC [14][15][16][17][18] and elsewhere [19][20][21] has matured to a point that it is now very effective. However, because the interface technology utilizes Lagrange multipliers to enforce the interface constraint conditions, the resulting system of equations is not positive-definite.…”

A mesh-independent interface technology for simulation of mixed-mode delamination growth

“…In another work (Maday et al, 1988) non-conforming ''mortar'' elements are employed to connect incompatible subdomains. The finite element interface technology developed at NASA LaRC (Ransom et al, 1993;Ransom, 1997;Housner et al, 1995;Aminpour et al, 1995;Aminpour and Krishnamurthy, 1997) and elsewhere (Aminpour et al, 1998) allows the connection of independently modeled substructures with incompatible discretization along the common boundary. This approach has matured to a point that it is now very effective.…”