ASTM C1863-18
(Test Method)Standard Test Method for Hoop Tensile Strength of Continuous Fiber-Reinforced Advanced Ceramic Composite Tubular Test Specimens at Ambient Temperature Using Direct Pressurization
Standard Test Method for Hoop Tensile Strength of Continuous Fiber-Reinforced Advanced Ceramic Composite Tubular Test Specimens at Ambient Temperature Using Direct Pressurization
SIGNIFICANCE AND USE
5.1 This test method (also known as “tube burst test”) may be used for material development, material comparison, material screening, material down selection, and quality assurance. This test method can also be used for material characterization, design data generation, material model verification/validation, or combinations thereof.
5.2 Continuous fiber-reinforced ceramic composites (CFCCs) are composed of continuous ceramic-fiber directional (1D, 2D, and 3D) reinforcements in a fine grain-sized (50 µm) ceramic matrix with controlled porosity. Often these composites have an engineered thin (0.1 to 10 µm) interface coating on the fibers to produce crack deflection and fiber pull-out.
5.3 CFCC components have distinctive and synergistic combinations of material properties, interface coatings, porosity control, composite architecture (1D, 2D, and 3D), and geometric shapes that are generally inseparable. Prediction of the mechanical performance of CFCC tubes (particularly with braid and 3D weave architectures) may not be possible by applying measured properties from flat CFCC plates to the design of tubes. This is because fabrication/processing methods may be unique to tubes and not replicable to flat plates, thereby producing compositionally similar but structurally and morphologically different CFCC materials. In particular, tubular components comprised of CFCC material form a unique synergistic combination of material, geometric shape, and reinforcement architecture that are generally inseparable. In other words, prediction of mechanical performance of CFCC tubes generally cannot be made by using properties measured from flat plates. Strength tests of internally pressurized CFCC tubes provide information on mechanical behavior and strength for a multiaxially stressed material.
5.4 Unlike monolithic advanced ceramics that fracture catastrophically from a single dominant flaw, CMCs generally experience “graceful” fracture from a cumulative damage process. The...
SCOPE
1.1 This test method covers the determination of the hoop tensile strength, including stress-strain response, of continuous fiber-reinforced advanced ceramic tubes subjected to direct internal pressurization that is applied monotonically at ambient temperature. This type of test configuration is sometimes referred to as “tube burst test.” This test method is specific to tube geometries, because flaw populations, fiber architecture, material fabrication, and test specimen geometry factors are often distinctly different in composite tubes, as compared to flat plates.
1.2 In the test method, a composite tube/cylinder with a defined gage section and a known wall thickness is loaded via internal pressurization from a pressurized fluid applied either directly to the material or through a secondary bladder inserted into the tube. The monotonically applied uniform radial pressure on the inside of the tube results in hoop stress-strain response of the composite tube that is recorded until failure of the tube. The hoop tensile strength and the hoop fracture strength are determined from the resulting maximum pressure and the pressure at fracture, respectively. The hoop tensile strains, the hoop proportional limit stress, and the modulus of elasticity in the hoop direction are determined from the stress-strain data. Note that hoop tensile strength as used in this test method refers to the tensile strength in the hoop direction from the introduction of a monotonically applied internal pressure where ‘monotonic’ refers to a continuous nonstop test rate without reversals from test initiation to final fracture.
1.3 This test method applies primarily to advanced ceramic matrix composite tubes with continuous fiber reinforcement: unidirectional (1D, filament wound and tape lay-up), bidirectional (2D, fabric/tape lay-up and weave), and tridirectional (3D, braid and weave). These types of ceramic matrix composites can be composed of a...
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C1863 − 18
Standard Test Method for
Hoop Tensile Strength of Continuous Fiber-Reinforced
Advanced Ceramic Composite Tubular Test Specimens at
1
Ambient Temperature Using Direct Pressurization
This standard is issued under the fixed designation C1863; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope wide range of crystalline and amorphous ceramic matrix
compositions (oxide, carbide, nitride, carbon, graphite, and
1.1 This test method covers the determination of the hoop
other compositions).
tensile strength, including stress-strain response, of continuous
fiber-reinforced advanced ceramic tubes subjected to direct
1.4 Thistestmethoddoesnotdirectlyaddressdiscontinuous
internalpressurizationthatisappliedmonotonicallyatambient
fiber-reinforced, whisker-reinforced, or particulate-reinforced
temperature. This type of test configuration is sometimes
ceramics, although the test methods detailed here may be
referred to as “tube burst test.” This test method is specific to
equally applicable to these composites.
tube geometries, because flaw populations, fiber architecture,
1.5 Thetestmethodisapplicabletoarangeoftestspecimen
material fabrication, and test specimen geometry factors are
tubegeometriesbasedontheintendedapplicationthatincludes
often distinctly different in composite tubes, as compared to
composite material property and tube radius. Lengths of the
flat plates.
compositetube,lengthofthepressurizedsection,andlengthof
1.2 In the test method, a composite tube/cylinder with a
tube overhang are determined so as to provide a gage length
defined gage section and a known wall thickness is loaded via
with uniform internal radial pressure. A wide range of combi-
internal pressurization from a pressurized fluid applied either
nationsofmaterialproperties,tuberadii,wallthicknesses,tube
directlytothematerialorthroughasecondarybladderinserted
lengths, and lengths of pressurized section are possible.
into the tube. The monotonically applied uniform radial pres-
1.5.1 This test method is specific to ambient temperature
sure on the inside of the tube results in hoop stress-strain
testing.Elevatedtemperaturetestingrequireshigh-temperature
response of the composite tube that is recorded until failure of
furnaces and heating devices with temperature control and
the tube. The hoop tensile strength and the hoop fracture
measurement systems and temperature-capable pressurization
strength are determined from the resulting maximum pressure
methods which are not addressed in this test method.
and the pressure at fracture, respectively. The hoop tensile
strains, the hoop proportional limit stress, and the modulus of
1.6 This test method addresses tubular test specimen
elasticity in the hoop direction are determined from the
geometries, test specimen preparation methods, testing rates
stress-straindata.Notethathooptensilestrengthasusedinthis
(that is, induced pressure rate), and data collection and report-
test method refers to the tensile strength in the hoop direction
ing procedures in the following sections:
from the introduction of a monotonically applied internal
Scope Section 1
pressure where ‘monotonic’refers to a continuous nonstop test
Referenced Documents Section 2
Terminology Section 3
rate without reversals from test initiation to final fracture.
Summary of Test Method Section 4
Significance and Use Section 5
1.3 This test method applies primarily to advanced ceramic
Interferences Section 6
matrix composite tubes with continuous fiber reinforcement:
Apparatus Section 7
unidirectional (1D, filament wound and tape lay-up), bidirec-
Hazards Section 8
Test Specimens Section 9
tional (2D, fabric/tape lay-up and weave), and tridirectional
Test Procedure Section 10
(3D, braid and weave). These types of ceramic matrix com-
Calculation of Results Section 11
posites can be composed of a wide range of ceramic fibers
Report Section 12
Precision and Bias Section 13
(oxide, graphite, carbide, nitride, and other compositions) in a
Keywords Section 14
Appendix
References
1
This test method is under the jurisdiction of ASTM Committee C28 on
Advanced Ceramics and is the direct responsibility of Subcommittee C28.07 on
1.7 Values expressed in this test method are in accordance
Ceramic Matrix Composites.
withtheInternationalSystemofUnits(SI)andIEEE/ASTMSI
Current edition approved Jan. 1, 2018. Published January 2018. Originally
approved in 2018. DOI: 10.1520/C1863-18. 10.
Copyr
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.