Use and application of MADYMO 5.3 foam material model for expanded polypropylene foam
conference paper
The dynamic material characteristics of expanded polypropylene are discussed. The in-depth studies, carried out by JSP International, in cooperation with TNO, are used to validate the MADYMO foam material model. The dynamic compression of expanded polypropylene follows a highly non-linear stress-strain curve. Attention is focused on the influence of impact velocity, shape, foam density and bottoming-out of the energy absorber. The obtained know-how results in the definition of the foam material model parameters for the strain rate dependent scaling function. Together with the specific foam loading and unloading functions this forms the basis for simulations of energy absorbers in expanded polypropylene. An excellent agreement can be obtained for a wide range of geometries and varying strain rates. This makes the MADYMO foam material model an effective engineering tool allowing development engineers to simulate ARPRO expanded polypropylene foam in occupant safety and dynamic impact applications.
Topics
TNO Identifier
362345
Source title
Proceedings of the 7th International MADYMO user's conference, 5 June 1998, Windsor, ON, Canada
Collation
7 p.
Pages
40-46
Files
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