ASTM C623 Elastic Properties Testing for Glass & Glass-Ceramic by Resonance
ASTM C623 is used to determine elastic properties (Young's Modulus, Shear Modulus, and Poisson's Ratio) for Glass and Glass-Ceramics by Resonance. The resonance frequencies of test bars of suitable geometry is measured by exciting them at continuously variable frequencies.
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
Overview
ASTM C623 determines the elastic properties of glass and glass-ceramic materials using the resonance method. The test measures natural vibration frequencies to calculate elastic modulus, shear modulus, and Poisson’s ratio.
This method is widely used in glass, optics, and advanced materials industries. It provides non-destructive evaluation of mechanical stiffness and helps ensure material performance in structural and functional applications.
Scope, Applications, and Benefits
Scope
ASTM C623 evaluates the elastic behavior of glass materials by exciting specimens into vibration and measuring resonance frequencies. The test provides accurate mechanical property data without damaging the sample.
The test evaluates:
- Elastic modulus (Young’s modulus)
- Shear modulus of materials
- Poisson’s ratio
- Material stiffness and rigidity
- Dynamic mechanical behavior
Applications
- Glass and glass-ceramic products
- Optical and precision components
- Electronic and display glass
- Structural glass applications
- Research and material development
- Quality control in glass manufacturing
Benefits
- Non-destructive testing method
- Provides accurate elastic property data
- Supports material design and engineering
- Helps predict mechanical performance
- Enables comparison of material stiffness
Test Process
Sample Preparation
Specimens are prepared with precise geometry and smooth surfaces.
1Excitation Setup
Samples are excited mechanically or acoustically to induce vibration.
2Resonance Measurement
Natural frequencies are measured using sensors and detection systems.
3Data Recording & Evaluation
Elastic properties are calculated based on resonance frequency data.
4Technical Specifications
| Parameter | Details |
|---|---|
| Applicable Materials | Glass and glass-ceramic materials |
| Frequency Range | ~1 kHz to 100 kHz |
| Specimen Shape | Rectangular or cylindrical bars |
| Measurement Accuracy | ±1% to ±3% |
| Temperature Range | ~20°C to 300°C |
| Measured Outputs | Elastic modulus, shear modulus, Poisson’s ratio |
Instrumentation Used for Testing
- Resonance testing system
- Vibration excitation device
- Frequency analyzer
- Sensors (accelerometers or microphones)
- Sample support fixtures
- Data acquisition system
Results and Deliverables
- Elastic modulus (Young’s modulus) values
- Shear modulus and Poisson’s ratio
- Resonance frequency data
- Material stiffness evaluation
- Test condition summary
- ASTM compliance report
Frequently Asked Questions
ASTM C623 determines elastic properties of glass and glass-ceramics using resonance techniques. It measures natural vibration frequencies of specimens. This helps evaluate stiffness and mechanical behavior of materials.
Key parameters include specimen dimensions, resonance frequency, vibration mode, and material density. Proper support and excitation conditions are required. These factors influence accuracy of elastic property measurements.
The test calculates elastic modulus, shear modulus, and Poisson’s ratio. These values are derived from resonance frequencies. They indicate stiffness and structural performance of the material.
ASTM C623 is used for glass and glass-ceramic materials. This includes optical glass, structural glass, and advanced ceramic-glass composites. These materials require precise elastic characterization.
ASTM C623 requires precise specimen preparation and controlled conditions. Results may be affected by geometry, defects, or damping effects. It may not fully represent behavior under complex loading conditions.
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