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The resonant frequency and internal friction are determined by the material structure of the measured sample and the shape and size of the sample. During a high temperature measurement the resonant frequency and internal friction of the sample is measured every 120 seconds during heating and cooling (standard settings, can be changed by the operator). Our systems can perform measurement from -100°C up to maximum 1700°C and during such a measurement the material structure of materials will undergo all kinds of changes and mapping out the resonant frequency and internal friction vs. temperature gives researchers an insight on what type of changes happened and at what temperature they occurred.
The resonant frequency of a sample is determined by it’s shape, dimensions, weight and elastic properties. So, by measuring the resonant frequency, dimensions and weight of a sample with a specific shape, we can calculate the elastic properties (ASTM E 1876).
In the impulse excitation technique the resonant frequency is determined by tapping the sample with a small hammer, recording the induced vibration signal with a microphone and analysing the vibration signal. This type of measurement is non-destructive, can be carried out in a matter of minutes and achieves overall accuracies of up to 1% if done correctly.
The impulse excitation technique calculates Young’s modulus, Shear modulus, Poisson ratio, internal friction and resonant frequency directly. By doing high temperature measurements, it’s also possible to determine relaxation, creep, brittle to ductile transition temperature, Debye temperature, …
The resonant frequency and internal friction measured using the impulse excitation technique can be seen as the fingerprint of a sample. If some event changes in the material structure of a sample this can be detected by measuring the resonant frequency and internal friction before and after the event.
Resonant frequency and internal friction are like a fingerprint of a specimen’s material structure. Therefore the impulse excitation technique is in some cases perfectly suited to be used as a quality control tool.
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NEWS & ANNOUNCEMENTS
Find us at the International Colloquium on Refractories Sept. 28-29 in Aachen
Wanna talk about refractory? Let’s meet at the International Colloquium on Refractories on Sept. 28 and 29 in Aachen. Our team is happy to discuss your application. Stay tuned for our booth number! Find all information here.
Come meet us at the Ceramics Expo 2022 in Cleveland (August 29-31) – booth 219
The Ceramics Expo 2022 will be held August 29 – 31 2022 at Huntington Convention Center of Cleveland, Ohio, USA. The Expo brings together manufacturers and engineers from across the medical, automotive, electronics, aerospace and defense, and energy sectors to source...
Come meet us at JEC Composites World in Paris (May 3 to 5, 2022)
Come meet us at JEC Composites World in Paris (May 3 to 5, 2022) booth 5N85Do you currently use a tensile test to determine properties of a material? Let us convince you on how to save time and costs by combining our Resonalyser procedure with...
Live online training sessions with IMCE Experts
Live online training sessions with IMCE Experts To get the best possible results with our measurement systems, you can now book live online training sessions with our IMCE experts. This virtual training provides you with an IMCE expert for live,...
REFERENCE CUSTOMERS
ABOUT US
At that time, the impulse excitation technique (IET) existed for more than 3000 years. When the first ceramic pots were produced, the craftsman knocked at their pots to check the ‘quality’. When we started our first developments, the IET was already standardized (ASTM C1259).
Our intension was – and still is – to bring the technique to a next level. Therefore, IMCE focused on the development of a robust signal analysis algorithm on a PC-based system which enables a very good signal analysis even under very rough circumstances with short signal lengths.
RFDA measurement devices
IMCE provides measurement systems and services to characterize elastic material properties such as Young’s modulus, shear modulus, Poisson’s ratio and internal friction. The Resonant Frequency and Damping Analyzer (RFDA) is based on the impulse excitation technique. Worldwide leading innovative software and hardware technology provide state of the art solutions for R&D laboratories and research institutes. IMCE offers elastic properties measurement systems according to ISO, ASTM and ENV standards at room temperature as well as at high temperature.
Benefits of RFDA measurement devices
- Non-destructive measurement of elastic and damping properties
- Large temperature range: -50 °C – 1700 °C
- Applicable to porous and brittle materials due to small strains
- Information about internal structure, damage
- Reliable, fast and easy accessible measurement technique
- Limited restrictions on sample geometry and dimensions