ASTM C1863 Hoop Tensile Strength Testing of Advanced Ceramic Tubes
ASTM C1863 is used to determine the hoop tensile strength, including stress-strain response, of continuous fiber-reinforced advanced ceramic (CFCC) tubes subjected to direct internal pressurization applied monotonically at ambient temperature. Hoop tensile strength tests provide information on the strength and deformation of materials under stresses induced from the internal pressurization of tubes.
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
Overview
ASTM C1863 is a standardised test method for evaluating the behaviour of continuous fibre-reinforced advanced ceramic composite (CFCC) tubes under internal pressure.
In essence, it is the tube burst test, where the tube is subjected to internal pressure until it ruptures. The test provides critical information on the mechanical properties of the material, namely the hoop tensile strength and the stress-strain curve.
Scope, Applications, and Benefits
Scope
This standard, ASTM C1863, applies to continuous fibre-reinforced ceramic composite (CFCC) tubes and ceramic matrix composites reinforced with continuous fibres. The matrices can be composed of oxides, carbides, nitrides, graphite, or other ceramic materials. The continuous fibre reinforcements can be made of oxide, carbide, nitride, or graphite fibres. Though it is primarily intended for continuous fibre-reinforced composites, the procedure may also apply to other ceramic reinforcement shapes.
It may also apply to:
– Discontinuous fibre-reinforced ceramics
– Whisker-reinforced ceramics
– Particulate-reinforced ceramics
Applications
- Material development and screening
- Material comparison and down selection
- Mechanical characterisation
- Design data generation
- Material model validation
- Structural performance evaluation
- Research and development of ceramic composites
Benefits
- Determines hoop tensile strength
- Measures hoop fracture strength
- Provides complete hoop stress-strain response
- Determines modulus of elasticity in hoop direction
- Determines proportional limit stress
- Evaluates Poisson’s ratio
- Supports structural reliability assessment
Test Process
Specimen Preparation & Setup
Measure tube dimensions and seal the specimen to the pressurization system.
1Internal Pressurization
Apply monotonic internal fluid pressure to the tube.
2Monitoring & Failure
Record radial expansion and strain as pressure increases until burst/fracture.
3Data Analysis
Calculate hoop tensile strength, fracture strength, modulus, and strain from the recorded data.
4Technical Specifications
| Parameter | Details |
|---|---|
| Loading Type | Radial internal pressure |
| Specimen Type | Tubular ceramic composite (CFCC) |
| Number of Specimens | Minimum 5 for mean estimation |
| Test Temperature | Ambient (standard condition unless specified otherwise) |
| Output Units | MPa (stress), strain (% or mm/mm), modulus (GPa) |
Instrumentation Used for Testing
- Internal hydraulic or pneumatic pressurization system
- Pressure controller and gauge
- Bladder system (optional)
- Strain measurement devices (strain gauges or extensometers)
- Data acquisition system
- Sealing fixtures and end caps
- Dimensional measurement tools
Results and Deliverables
- Hoop tensile strength (ultimate)
- Hoop fracture strength
- Hoop stress-strain curve
- Proportional limit stress
- Modulus of elasticity (hoop direction)
- Poisson’s ratio
- Failure mode analysis
- Statistical strength evaluation
- Design and validation data reports
Infinita Lab: Your Material Testing Partner
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- End-to-end testing management, faster turnaround, reduced administrative burden.
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- Engineers and R&D managers focus on core work rather than testing logistics.
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Frequently Asked Questions
ASTM C1863 is a standard test method used to determine the hoop tensile strength of advanced ceramic tubes by applying direct internal fluid or gas pressurization until failure occurs.
The method applies to monolithic advanced ceramic tubes such as silicon carbide, alumina, silicon nitride, and other structural ceramics used in high-temperature or corrosive environments.
Direct pressurization closely simulates real service conditions for tubes used in heat exchangers, combustors, and piping systems exposed to internal pressure.
The test measures hoop tensile strength, indicating the tube’s resistance to circumferential tensile stresses generated by internal pressurization.
Results depend on tube dimensions, wall thickness, surface finish, internal defects, temperature, pressurization rate, and sealing integrity during testing.
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