EN ISO 6721-3 Plastics - Determination of Dynamic Mechanical Properties - Part 3: Bending Vibration - Resonance Curve Method

Material Testing

EN ISO 6721-3 Plastics - Determination of Dynamic Mechanical Properties - Part 3: Bending Vibration - Resonance Curve Method

EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of EN ISO 6721-3 testing. This standard covers a bending-vibration method based on resonance curves to determine the flexural complex modulus of homogeneous plastics and the damping properties of laminated plastics for acoustic insulation.

EN ISO 6721-3 Plastics - Determination of Dynamic Mechanical Properties - Part 3: Bending Vibration - Resonance Curve Method

For example, systems consisting of a metal sheet covered with a damping plastic layer, or sandwich systems consisting of two sheet metal layers with an intermediate plastic layer. For many purposes it is useful to determine these properties as a function of temperature and frequency.

Specimens are rectangular bars or bars thick enough to provide sufficient bending stiffness critical to the resonant frequency.
There will be stripes. On the other hand, the thickness will be small enough compared to the wavelength of the bending vibration.

The thickness of the layers of a multi-layer system will depend on the purpose for which the system is designed. With bending-vibration test
when comparing various systems, the preferred ratio of the mass of the plastic sheet to the mass of the base sheet material is 1:5.

Multilayer samples shall be manufactured with the thickness and production techniques to be used in the envisaged end use. For example, for a plastic material on a steel plate, the plastic can be applied to the metal by spraying, as a sealant or as a glued plate.

EUROLAB assists manufacturers with EN ISO 6721-3 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.

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