WORKING PRINCIPLE
The idea
From this simple principle, from the analysis of a small metal rod bouncing on a rubber material.
The basic principle of VESevo.
A high-frequency optical measurement system, embedded in a zero-friction rod launch mechanism guaranteeing lab-quality repeatability, with temperature monitoring, dedicated software and full portability, becomes a groundbreaking innovation in viscoelastic materials assessment and characterization.
The output
VESevo provides the characterization of a viscoelastic material in terms of the widely used indexes E’ (storage modulus, related to the “in-phase” elastic response) and tan(δ) (tangent delta, linked to loss factor and to the dissipative response).
Such variables are deeply linked to the attitude of the material to generate “grip”, respectively as concerns adhesive and hysteretic friction generation mechanisms.
The data provided by VESevo test are highly reliable and are comparable, in terms of quality, to the results usually obtainable by a DMA (Dynamic Mechanical Analysis) test. With the advantage, respect to DMA, that VESevo methodology is faster and cheaper than DMA and completely non-destructive, allowing to monitor the material properties during its whole lifecycle.
Master curves & visco-indexes
VESevo can produce two kind of results, providing both material full thermal characterization and viscoelasticity performance indexes:
MASTER CURVES
The availability of the viscoelastic E’ and tan(δ) master curves allows a deep analysis of the material behavior with reference to temperature and frequency, useful to identify Tg and the response in a wide range of conditions
VISCO-INDEXES
For faster “trackside” needs and for quality control assessment, specific viscoelasticity performance indexes have been developed, representative of the elastic and damping response of the material.