Módulo en caliente para ensayos no destructivos: análisis DMA hasta altas temperaturas
Para cerámicas, metales, aleaciones, cristales, materiales compuestos y más
Highlights
La gama de DMA GABO Eplexor®® HT es la única línea de equipos en el mercado, capaz de realizar ensayos de DMA con una fuerza dinámica máxima de 500N hasta una temperatura de 1500ºC
Hay disponibles dos hornos de alta temperatura: RT hasta 1000°C y RT hasta 1500°C. Con un horno estándar (-160 hasta 500ºC) montado de manera simultánea, es posible realizar ensayos de manera consecutiva tanto en el rango de baja como de alta temperatura, por tanto los equipos de la serie Eplexor®® HT son capaces de cubrir todo el rango de temperatura comprendido entre -160 y 1500ºC.
La electrónica del sistema identifica de manera automática el horno usado en cada momento.
Están disponibles las siguientes configuraciones de DMA GABO Eplexor®® HT:
| Configuración del equipo | Fuerza estática Max. Static | Fuerza Dinámica Max. *) |
|---|---|---|
| DMA GABO Eplexor®® 25N HT | 1500 N | ± 25 N |
| DMA GABO Eplexor®® 100N HT | 1500 N | ± 100 N |
| DMA GABO Eplexor®® 150N HT | 1500 N | ± 150 N |
| DMA GABO Eplexor®® 500N HT | 1500 N | ± 500 N |
Method
The Dynamic Mechanical Thermal Analyzer applies forced periodic loads to the sample and analyzes the phase shift between this primary excitation and the material’s response. The response of an ideal elastic system (e.g., spring) on a sinusoidal load at a given frequency is of the same frequency and exactly in phase with the excitation. The situation changes in a real system: A phase shift (δ > 0°) between the primary excitation and response of the same frequency occurs in the case of linear visco-elastic materials (e.g., polymers).
Elastic and non-elastic properties inherently describe the dynamic mechanical performance of the material. The storage modulus E’, the real part of the complex modulus E*, represents the elastic component; the Viscous modulusThe complex modulus (viscous component), loss modulus, or G’’, is the “imaginary” part of the samples the overall complex modulus. This viscous component indicates the liquid like, or out of phase, response of the sample being measurement. loss modulus E’’, the dissipated part, is the imaginary part. Depicted in the complex plane, the loss and storage modulus are the projections of the complex modulus onto the real and imaginary axis. The tangent of the angle between the real axis and the complex modulus (E*) represents the phase shift (tanδ) between the two.
Specifications
Technical Data
Temperature Range
the full temperature range can be covered if the instrument is equipped with the low-temperature and one high-temperature furnace
Frequency Range
optional: 0.0001 Hz; 200 Hz
Static Force Range
- Dynamic force range:
from ± 25 N up to ± 500 N (depending on instrument type, see table) - Force sensor:
interchangeable; nominal forces available from 10 N to 500 N (depending on the instrument type and configuration) - Static displacement:
max. 60 mm - Dynamic amplitude:
from ± 1.5 mm up to ± 6 mm (depending on the instrument type and system configuration) - Measurement modes for applications above 500°C:
asymmetric and 3/4-point bending, compression - Work space of the high-temperature furnaces:
cylindrical chamber, diameter: 70 mm, height: 120 mm
Software
The comprehensive DMA GABO Eplexor® HT Series software is based on Windows operating systems. The extensive software package comprises data and curve analyses, hysteresis representation, master curve calculations, etc.
It also includes specific templates for tension, compression or bending tests.
The software features include:
- Frequency sweep of 0.001 Hz to 100 Hz (optional 0.0001 Hz and 200 Hz)
- Temperature sweep (controlled temperature variation at fixed frequency)
- Time sweep from 1 s to 107 s
- Correlated temperature and frequency sweep at isothermal steps
- Correlated dynamic and static StrainStrain describes a deformation of a material, which is loaded mechanically by an external force or stress. Rubber compounds show creep properties, if a static load is applied.strain amplitude sweeps; equidistantly or logarithmically subdivided
- Master curves (TTS, WLF, numeric mastering), segment tests
- Evaluation of complex modulus (E*, G*), storage modulus (E’, G’), Viscous modulusThe complex modulus (viscous component), loss modulus, or G’’, is the “imaginary” part of the samples the overall complex modulus. This viscous component indicates the liquid like, or out of phase, response of the sample being measurement. loss modulus (E’’, G’’) damping factor (t and δ) by temperature sweeps, StrainStrain describes a deformation of a material, which is loaded mechanically by an external force or stress. Rubber compounds show creep properties, if a static load is applied.strain and force sweeps, time sweeps, Temperatura de Transición VítreaThe glass transition is one of the most important properties of amorphous and semi-crystalline materials, e.g., inorganic glasses, amorphous metals, polymers, pharmaceuticals and food ingredients, etc., and describes the temperature region where the mechanical properties of the materials change from hard and brittle to more soft, deformable or rubbery.glass transition temperature, and optional creep, RelaxationWhen a constant strain is applied to a rubber compound, the force necessary to maintain that strain is not constant but decreases with time; this behavior is known as stress relaxation. The process responsible for stress relaxation can be physical or chemical, and under normal conditions, both will occur at the same time. relaxation, fatigue, energy loss, hysteresis, Payne/Mullins effect analysis and crack growth testing
- Determination of the thermal expansion in tension mode (optional)
- Prediction of the Rolling ResistanceThe rolling resistance is a force resisting the motion when a body is rolling across a surface. This determines the slip resistance of, e.g., car or truck tires.rolling resistance of tires (optional)
Consultancy & Sales
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Service & Support
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Downloads & Media
Literatura
Literatura de aplicación
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