[MBDyn-users] Composite material

mantegazza at aero.polimi.it mantegazza at aero.polimi.it
Mon Aug 24 14:18:06 CEST 2009

> Romuald NORET wrote:
>> I seen some examples with composite materials with MBDyn, but I didn't
>> find a constitutive law to represent a orthotropic material for
>> instance.
>> Can I ask if it is really possible and how can I model those type of
>> materials?
> The linear (visco)elastic generic requires a full matrix.  For example,
> if you model a beam, you need to provide 6x6 coefficients (it'd better
> be symmetric, probably :).  Other constitutive laws, including the nlp
> and nlsf ones, allow to have an orthotropic linear relationship
> superimposed to a nonlinear diagonal relationship.
> As per how to compute the coefficients for a composite beam section,
> that's an entirely separate business.  You're supposed to have the
> coefficients yourself, typically from some experiment or from some
> sophisticated FEM analysis of orthotropic structural components.

If needed look at Pierangelo references, or surf the net for "anba beam
composites", for references comprehensively addressing the above problem
from our point of view, i.e. Dipartimento di Ingegneria Aerospaziale,
Politecnico di Milano.


> Cheers, p.
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