ASTM D 747 Cantilever Beam Test
This ASTM D 747 Standard test method covers the determination of the apparent bending modulus of plastics using a cantilever beam. It is well suited for determining the relative flexibility of materials over a wide range.
TRUSTED BY
Precision-driven testing for dimensional accuracy and compliance
- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
Overview
ASTM D 747 cantilever beam testing is the standard method for measuring the apparent bending modulus of stiffness of plastics using a cantilever beam flexure approach. ASTM D 747 outlines specimen preparation, the required test equipment, and procedures for measuring stiffness. This helps materials engineers, product designers, and manufacturers obtain reliable flexural stiffness data to select materials, validate product designs, and verify suppliers.
Scope, Applications, and Benefits
Scope
ASTM D 747 measures the apparent bending modulus of plastic materials. It does this by fixing a specific specimen as a cantilever beam and applying a set bending moment. The test measures the angle of deflection and calculates the apparent bending modulus of stiffness from the applied moment and the measured deflection response.
ASTM D 747 cantilever beam testing evaluates:
- Apparent bending modulus of stiffness of thermoplastic and thermoset plastic materials
- Flexural stiffness characteristics of plastic sheet, film, and molded material specimens
- Comparative stiffness performance of plastic materials under defined cantilever bending conditions
- Effect of material thickness, filler content, and processing on plastic bending stiffness
- Compliance with defined minimum stiffness requirements for plastic materials
Applications
- Thermoplastic and thermoset sheet and molded materials requiring stiffness characterization
- Flexible plastic films and thin sheet materials require bending modulus determination
- Reinforced and filled plastic compounds for structural and load-bearing design applications
- Plastic packaging, consumer product, and industrial component stiffness evaluation
- Material suppliers and processors requiring ASTM D 747 stiffness test data
Benefits
- Provides reliable cantilever bending stiffness data for plastic material selection and design
- Supports material specification compliance and supplier verification programs
- Identifies stiffness deficiencies in plastic materials before production processing
- Delivers traceable stiffness test records for engineering and research submissions
- Reduces design risk by verifying plastic bending stiffness early in the approval process
Test Process
Sample Preparation
Plastic specimens cut to defined dimensions and conditioned per ASTM D 747 requirements.
1Cantilever Beam Setup
Specimen clamped as cantilever beam and bending moment applied at defined loading point.
2Deflection Measurement
Angular deflection measured under applied bending moment at defined test conditions.
3Data Analysis & Reporting
Apparent bending modulus calculated and assessed against criteria for test compliance result.
4Technical Specifications
| Parameter | Details |
|---|---|
| Applicable Materials | Thermoplastic, thermoset, reinforced, and flexible plastic sheet and molded materials |
| Specimen Geometry | Defined cantilever beam specimen dimensions per ASTM D 747 requirements |
| Loading Conditions | Defined bending moment applied at cantilever specimen loading point |
| Measured Parameters | Angular deflection, applied moment, and apparent bending modulus of stiffness |
| Measured Outputs | Angular deflection, apparent bending modulus values, and test compliance result |
Instrumentation Used for Testing
- ASTM D 747 cantilever beam stiffness test apparatus
- Precision angular deflection measurement system
- Defined bending moment loading and application equipment
- Specimen conditioning chamber with temperature and humidity control
- Precision dimensional measurement tools for specimen geometry verification
- Data acquisition and test reporting system
Results and Deliverables
- Angular deflection and applied bending moment data for all tested specimens
- Apparent bending modulus of stiffness values per ASTM D 747
- Statistical summary of stiffness results across the test specimen set
- Test compliance result assessed against the defined material stiffness requirements
- ASTM D 747 test report for material approval, design verification, and supplier assessment submissions
Why Choose Infinita Lab for ASTM D 747?
At the core of this breadth is our network of 2,000+ accredited labs in the USA, offering access to over 10,000 test types. From advanced metrology (SEM, TEM, RBS, XPS) to mechanical, dielectric, environmental, and standardized ASTM/ISO testing, we give clients unmatched flexibility, specialization, and scale. You’re not limited by geography, facility, or methodology—Infinita connects you to the right testing, every time.
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 D747 measures the bending properties of plastics with a cantilever beam method. It determines stiffness and modulus by applying load to a specimen that is fixed at one end, while the other end bends.
ASTM D747 helps engineers measure the bending stiffness of plastics. This ensures that materials stay stable when they face flexural loads. This is important in applications like electronic housings, automotive parts, and structural plastic components.
ASTM D747 is often used for thermoplastics, thermosets, reinforced plastics, and rigid polymer materials. These materials are found in electrical insulation, automotive parts, appliances, and industrial equipment that need dependable flexural stiffness performance.
ASTM D747 testing holds one end of the specimen in place while applying a load at the free end. It measures deflection to calculate the flexural modulus and stiffness of the plastic material.
ASTM D747 assesses flexural properties under controlled cantilever loading conditions. It may not reflect the complex stresses that materials face in real-life situations where they experience combined loads, environmental factors, or long-term use.
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
