ASTM D6790/D6790M Determining Poisson’s Ratio of Honeycomb Cores
ASTM D6790/D6790M test method determines the properties of honeycomb cores by detecting their Poisson ratio from the anticlastic curvature radii. Factors affecting honeycomb Poisson’s ratio are also stated and dealt with. The final results of this test method are expressed in SI units or inch-pound units.
TRUSTED BY
Precision-driven testing for dimensional accuracy and compliance
- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
Overview
ASTM D6790/D6790M is a specific standard test method for determining the Poisson’s ratio of honeycomb core materials. Conventional test methods cannot effectively measure this parameter.
The results are essential for understanding the material’s behaviour. The results are used to design structures, specify materials, justify research, identify applications, and control quality across various engineering and industrial fields.
Scope, Applications, and Benefits
Scope
ASTM D6790/D6790M evaluates:
- Poisson’s ratio of honeycomb core materials
- Anticlastic curvature behavior under bending
- Mechanical deformation characteristics
- Structural response to applied curvature
The method applies to metallic and non-metallic honeycomb core materials used in sandwich structures.
Applications
- Aerospace sandwich panels
- Automotive lightweight structures
- Marine composite components
- Wind turbine blade cores
- Structural insulation panels
- Research and development
- Quality assurance testing
- Material qualification programs
Benefits
- Enables accurate Poisson’s ratio measurement
- Supports structural design optimization
- Assists in material selection
- Improves performance prediction
- Provides standardized test data
- Enhances quality control
- Facilitates comparison between core materials
Test Process
Specimen Measurement
Specimen thickness is measured, and the average thickness is calculated.
1Bending Setup
The core specimen is bent around a cylinder of known radius.
2Chord & Curvature Measurement
Chord distance and anticlastic curvature at the midpoint are measured.
3Data Recording
Depth and chord measurements are recorded for calculations.
4Technical Specifications
| Parameter | Details |
|---|---|
| Applicable Materials | Honeycomb core materials |
| Specimen Size | 300 × 300 mm |
| Measurement Method | Chord and depth method |
| Output Units | Dimensionless |
| Measured Outputs | Poisson’s ratio, curvature radius |
Instrumentation Used for Testing
- Cylindrical bending mandrel
- Precision straight edge
- Measuring scale
- Vernier calipers
- Depth gauge
- Flat surface support
- Data recording tools
Results and Deliverables
- Poisson’s ratio values
- Anticlastic curvature radius (Ra)
- Test data sheets
- Comparative material performance reports
- Quality compliance documentation
- Research and validation records
Frequently Asked Questions
Case Studies
In-depth examination of genuine material testing solutions
Dopant and Ultra-Low Concentration Elemental Analysis Using STEM…
Dopant and Ultra-Low Concentration Elemental Analysis Using STEM…
Introduction to STEM-EELS for Elemental Analysis Scanning Transmission Electron Microscopy (STEM) combined with Electron Energy Loss...
Read Case StudyAnalysis of PVC Pipe Degradation Using FTIR Spectroscopy
Analysis of PVC Pipe Degradation Using FTIR Spectroscopy
PVC Pipe in Infrastructure — and Why Degradation Matters Polyvinyl chloride (PVC) pressure pipe is one...
Read Case StudyNano-scale roughness measurement of Si-wafers by Atomic Force…
Nano-scale roughness measurement of Si-wafers by Atomic Force…
Nano-scale surface roughness is a critical parameter in fabricated thin-films that are used in optics, solar...
Read Case Study
Request a Quote
Submit your material details and receive testing procedures, pricing, and turnaround time within 24 hours.
Quick Turnaround and Hasslefree process
Confidentiality Guarantee
Free, No-obligation Consultation
100% Customer Satisfaction
