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Product enhancement and the focused extension of the product portfolio is a major issue for software development company. Participation in international and national research projects helps to stay on the leading edge in the fields of interest. Exploratory developments carried out in the framework of international research projects are taken up by SMR, the goal being their commercialization.

Recent projects at SMR include coupled aero-thermal simulations of the reentry phase of a space test vehicle (ESA project), as well as developments with SMR's products, such as the common mesh refinement method and mesh deformation techniques for coupled simulations.

Submodelling Framework

The submodelling framework tool allows for generating FE meshes and boundary conditions of thin-walled structures, such as airplane components. Starting from a surface description, the tools can generate shell, solid, or mixed shell and solid FE models, with special emphasis on composites. Figure shows a FE mesh of an aluminum fuselage barrel section with stringers and frames.

Mesh Based Coupling

The L2 minimization coupling method allows for fluid/structure coupling and is more accurate than other methods. It also works with other coupling procedures, such as non-matching interfaces (global-local coupling of FE computations, non-matching component mode synthesis, stringer-to-shell coupling, tying).

ALaSCA FP7 Research Project

FE mesh of aluminum-composite
fuselage (click to enlarge).
Study of Aluminum-Composite interfaces for lattice-based novel aircraft structures. Picture to the right: 3m aluminum monococque (blue) and 3m composite (red) fuselage barrel. The skew hat stringers are placed both on inner and on outer side of the shell. Frames and hat stiffeners are modeled with beam elements. The skin consists of triangular shell elements. Shell and beam elements are compatible.

COCOMAT FP7 Research Project

Study of buckling and post-buckling behaviour of composite laminated shell structures. Within COCOMAT, SMR performed static and implicit transient post-buckling calculations with B2000++. A damage and degradation model for in-plane failure was added to B2000++. See presentation at the Fifth Community Aeronautics Days, Vienna, 2006. The video shows a panel deformation under very slow dynamic edge shortening (3 mm in 30 sec). Graph plots edge reaction force as function of time.

International Projects

SMR has participated and currently participates in several research projects. EC-funded research projects allow small companies like SMR to improve software using the latest technologies, to get access to leading edge know-how, to stay in contact with colleagues throughout Europe, to get our products known in a wider scientific context, and to collaborate with partners using our products.

Production and analysis of lattice and geodesic aircraft fuselage barrels, an FP7 project (ongoing).
ALaSCA Advanced Lattice Structures for Composite Airframes, a 7th Framework Programme project.
DAEDALOS Dynamics in aircraft engineering design and analysis, a 7th Framework Programme project.
glFEM Generic linking of finite element based models, a 7th Framework Programme project.
sade Smart high lift devices for next generation wings, a 7th Framework Programme project. See also Aeroelastic Analysis Tool.
COCOMAT  Improved Material Exploitation at Safe Design of Composite Airframe Structures by Accurate Simulation of Collapse, a 6th Framework Programme project.
TAURUS Technology Development for Aero-elastic Simulations on Unstructured Grids, a 5th Framework Programme project. Website withdrawn.
BOJCAS Bolted Joints in Composite Aircraft Structures, a 5th Framework Programme project.
HICAS High Velocity Impact of Composite Aircraft Structures, a BRITE-EURAM III Programme project
JULIUS Joint Industrial Interface for End-user Simulations ESPRIT Research Programme. Website withdrawn.