ASTM C848 Test for Young’s Modulus, Shear Modulus, and Poisson’s Ratio For Ceramic Whitewares by Resonance
ASTM C848 is used to determine elastic properties (Young's Modulus, Shear Modulus, and Poisson's Ratio) for Ceramic Whitewares by Resonance.
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
Overview
ASTM C848 is a standard test method used to determine the elastic properties of ceramic whiteware materials, specifically Young’s Modulus, Shear Modulus, and Poisson’s Ratio, through resonance frequency measurement. The method involves exciting a test specimen into resonant vibration and measuring the frequencies at which flexural and torsional resonance occur, from which elastic constants are calculated.
This test is particularly valuable for quality control and material characterization of ceramic whiteware products such as porcelain, steatite, and alumina-based ceramics. It provides non-destructive, highly repeatable results that reflect the true elastic behavior of the material under ambient conditions, making it suitable for both research and production environments.
Scope, Applications, and Benefits
Scope
ASTM C848 applies to ceramic whiteware specimens prepared in standard bar or disc geometries. The test covers the determination of three interrelated elastic constants from a single specimen using resonance excitation techniques.
- Applies to dense and semi-vitreous ceramic whiteware materials
- Covers bar-shaped and disc-shaped test specimens
- Suitable for fired ceramic bodies including porcelain, steatite, cordierite, and alumina ceramics
- Applicable to both laboratory-prepared specimens and production samples
- Covers room-temperature measurements under ambient conditions
- Applicable to isotropic ceramic materials where uniform elastic behavior is assumed
Applications
- Elastic property characterization of porcelain and technical ceramic components
- Quality control of fired ceramic whiteware during production
- Material development and formulation optimization of ceramic bodies
- Comparative evaluation of different ceramic compositions or firing conditions
- Input data generation for finite element analysis (FEA) and structural simulations
- Research and development of advanced ceramic materials
- Verification of ceramic components used in electrical insulation applications
- Benchmarking ceramic batches for consistency in mechanical properties
Benefits
- Non-destructive method — specimen remains intact after testing
- Highly repeatable and precise measurements with minimal operator variation
- Simultaneously determines three elastic constants from one specimen
- Suitable for brittle materials that are difficult to test by conventional mechanical methods
- Requires minimal specimen preparation compared to mechanical test methods
- Fast test execution with short turnaround
- Applicable across a wide range of ceramic whiteware compositions
- Reliable data for structural design and material modeling
Test Process
Specimen Preparation
Specimen is machined or fired to specified bar or disc geometry with controlled dimensions and surface finish.
1Resonance Excitation
Specimen is mechanically excited using an impulse or vibration driver to induce flexural and torsional resonance modes.
2Frequency Measurement
Resonant frequencies are detected and recorded using a transducer or microphone connected to a frequency analyzer.
3Elastic Constant Calculation
Young's Modulus, Shear Modulus, and Poisson's Ratio are calculated from measured frequencies, mass, and geometry.
4Technical Specifications
| Parameter | Details |
|---|---|
| Specimen Geometry | Rectangular bar or disc form |
| Specimen Dimensions | Typically 120 mm × 25 mm × 6 mm or as specified |
| Properties Measured | Young's Modulus (E), Shear Modulus (G), Poisson's Ratio (ν) |
| Test Temperature | Ambient (room temperature) |
| Excitation Method | Mechanical impulse or electromechanical vibration |
| Detection Method | Contact transducer or non-contact microphone pickup |
| Frequency Range | Typically 1 kHz – 100 kHz depending on specimen |
Instrumentation Used for Testing
- Impulse excitation apparatus or mechanical vibration driver
- Frequency analyzer or FFT spectrum analyzer
- Piezoelectric transducer or condenser microphone
- Precision balance for specimen mass measurement
- Digital calipers or micrometer for dimensional measurement
- Data acquisition system with resonance detection software
Results and Deliverables
- Young’s Modulus (E) value in GPa
- Shear Modulus (G) value in GPa
- Poisson’s Ratio (ν), dimensionless
- Resonant frequency data for flexural and torsional modes
- Specimen dimensional and mass data used in calculations
- Test report compliant with ASTM C848 reporting requirements
- Statistical summary if multiple specimens are tested
Why Choose Infinita Lab for ASTM C848 ?
Infinita Lab is a leading provider of ASTM C848 and streamlined material testing services, addressing the critical challenges faced by emerging businesses and established enterprises. With access to a vast network of over 2,000+ accredited partner labs across the United States, Infinita Lab ensures rapid, accurate, and cost-effective testing solutions. The company’s unique value proposition includes comprehensive project management, confidentiality assurance, and seamless communication through a Single Point of Contact (SPOC) model. By eliminating inefficiencies in traditional material testing workflows, Infinita Lab accelerates research and development (R&D) processes.
Looking for a trusted partner to achieve your research goals? Schedule a meeting with us, send us a request, or call us at (888) 878-3090 to learn more about our services and how we can support you. Request a Quote
Frequently Asked Questions
ASTM C848 determines Young's Modulus, Shear Modulus, and Poisson's Ratio of ceramic whiteware materials using resonance frequency measurement. It provides accurate elastic property data for quality control, material development, and structural design applications.
The correct relationship between Young's modulus (Y), shear modulus (G), and Poisson's ratio (μ) is Y=2G(1+μ) Q. A bar made of material whose Young's modulus is equal to E and Poisson's ratio to μ is subjected to the hydrostatic pressure p
The standard is best suited for dense to semi-vitreous ceramics. High porosity may affect resonance clarity and measurement accuracy, so its applicability to highly porous bodies should be confirmed with the testing laboratory.
Poisson's Ratio describes how a ceramic deforms laterally when loaded axially. It is essential for accurate FEA modeling and helps predict how ceramic components behave under real-world mechanical loading conditions.
Flexural resonance is used to calculate Young's Modulus, while torsional resonance yields Shear Modulus. Both frequencies together allow derivation of Poisson's Ratio through their mathematical relationship.
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