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damping structure sandwich

Damping of multi-layer composites

Submitted by ErwanVerron on
research
damping structure sandwich

We recently published two papers that present an optimization method to design multi-layer composites with damping properties. The method consists in adding elastomeric layers in the composite. In this way, a multi-criteria optimization tool has been developed to determine the best geometrical and material properties of the composite: position of the elastomeric layers, layers thickness, ...

Problem of extracting structural damping

Submitted by chlif_med on
research
thin core
damping structure sandwich

Hello;

I have a problem of extracting structural damping coefficient of a sandwich plate type steel / polymer / steel. I have already entered the shear modulus of the polymer in ABAQUS G = G0 (iw) / (1 + iw) With the: *viscoelastic, frequency=TABULAR

I do not know if my approach is right?

My inp file has this form:

 

*NODE, NSET=ALLNODES, SYSTEM=R

..

*ELEMENT, TYPE=S4      , ELSET=THIN-SHELL1

..

*SHELL GENERAL SECTION,

 ELSET=THIN-SHELL1 ,

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