Mechanical Properties and Failure Investigation of Metallic Open Lattice Cellular Structures
A generic open lattice cellular structure under compressive loading is investigated by means of numerical analysis. The cellular structure is produced of stainless steel sheets using the punching and folding technique. The Finite Element method is used to derive the most important structural core properties, i.e. elasticity modulus, plateau stress and compaction strain, as well as to study the non-linear response and complex failure processes that occur as the core collapses in compression. Two concurrent Finite Element models are developed, a simple beam element model and a more complicated shell element model. The results obtained from simulations of the structure under compressive loading using the two versions of the FE modeling are compared to results of quasi — static compression experimental tests. The influence of geometrical parameters and strut cross section parameters on the core structure mechanical properties is parametrically studied.
KeywordsCellular structures Mechanical properties FE modelling Non-linear response Static compression
Unable to display preview. Download preview PDF.
- 1.McKown S, Mines RAW (2006) Impact behavior of metal foam cored sandwich beams, European Conference on Fracture 16, Alexandroupolis, Greece, Paper No. 254.Google Scholar
- 5.Cellular Structures for Impact Performance — CELPACT Project, CELPACT 18M Interim Activity Report, 2008.Google Scholar
- 6.Gibson LJ, Ashby MF (1999) Cellular Solids, Cambridge Solid State Science Series, Cambridge University Press, Cambridge, United Kingdom.Google Scholar
- 7.Cellular Structures for Impact Performance — CELPACT Project, Experimental Results of Open Lattice Core, Internal Communication Report, 2008.Google Scholar
- 8.Curtis HD (1997) Fundamentals of Aircraft Structural Analysis, WCB/McGraw-Hill, Boston, MA, USA.Google Scholar