ASTM C1468-00
(Test Method)Standard Test Method for Transthickness Tensile Strength of Continuous Fiber-Reinforced Advanced Ceramics at Ambient Temperature
Standard Test Method for Transthickness Tensile Strength of Continuous Fiber-Reinforced Advanced Ceramics at Ambient Temperature
SCOPE
1.1 This test method covers the determination of transthickness tensile strength (SUT) under monotonic uniaxial loading of continuous fiber-reinforced ceramics (CFCC) at ambient temperature. This test method addresses, but is not restricted to, various suggested test specimen geometries, test fixtures, data collection and reporting procedure. In general, round or square test specimens are tensile tested in the direction normal to the thickness by bonding appropriate hardware to the samples and performing the test. For a Cartesian coordinate system, the x-axis and the y-axis are in the plane of the test specimen. The transthickness direction is normal to the plane and is labeled the z-axis for this test method. For CFCCs, the plane of the test specimen normally contains the larger of the three dimensions and is parallel to the fiber layers for uni-directional, bi-directional, and woven composites. Note that transthickness tensile strength as used in this test method refers to the tensile strength obtained under monotonic uniaxial loading where monotonic refers to a continuous nonstop test rate with no reversals from test initiation to final fracture.
1.2 This test method is intended primarily for use with all advanced ceramic matrix composites with continuous fiber reinforcement: unidirectional (1-D), bidirectional (2-D), woven, and tridirectional (3-D). In addition, this test method also may be used with glass (amorphous) matrix composites with 1-D, 2-D, and 3-D continuous fiber reinforcement. This test method does not address directly discontinuous fiber-reinforced, whisker-reinforced or particulate-reinforced ceramics, although the test methods detailed here may be equally applicable to these composites. It should be noted that 3-D architectures with a high volume fraction of fibers in the " z" direction may be difficult to test successfully.
1.3 Values are in accordance with the International System of Units (SI) and Practice E380.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Additional recommendations are provided in and Section .
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Designation: C 1468 – 00
Standard Test Method for
Transthickness Tensile Strength of Continuous Fiber-
1
Reinforced Advanced Ceramics at Ambient Temperature
This standard is issued under the fixed designation C 1468; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope bility of regulatory limitations prior to use. Additional recom-
mendations are provided in 6.7 and Section 7.
1.1 This test method covers the determination of transthick-
T
ness tensile strength ~S ! under monotonic uniaxial loading of
U
2. Referenced Documents
continuous fiber-reinforced ceramics (CFCC) at ambient tem-
2.1 ASTM Standards:
perature. This test method addresses, but is not restricted to,
2
C 1145 Terminology on Advanced Ceramics
various suggested test specimen geometries, test fixtures, data
C 1239 Practice for Reporting Uniaxial Strength Data and
collection and reporting procedure. In general, round or square
Estimating Weibull Distribution Parameters for Advanced
test specimens are tensile tested in the direction normal to the
2
Ceramics
thickness by bonding appropriate hardware to the samples and
C 1275 Test Method for Monotonic Tensile Strength Test-
performing the test. For a Cartesian coordinate system, the
ing of Continuous Fiber-Reinforced Advanced Ceramics
x-axis and the y-axis are in the plane of the test specimen. The
With Solid Rectangular Cross-Section Specimens at Am-
transthickness direction is normal to the plane and is labeled
2
bient Temperatures
the z-axis for this test method. For CFCCs, the plane of the test
D 3878 Terminology of High-Modulus Reinforcing Fibers
specimen normally contains the larger of the three dimensions
3
and Their Composites
and is parallel to the fiber layers for uni-directional, bi-
4
E 4 Practices for Force Verification of Testing Machines
directional, and woven composites. Note that transthickness
E 6 Terminology Relating to Methods of Mechanical Test-
tensile strength as used in this test method refers to the tensile
4
ing
strength obtained under monotonic uniaxial loading where
E 337 Test Method for Measuring Humidity With a Psy-
monotonic refers to a continuous nonstop test rate with no
chrometer (the Measurement of Wet-and Dry-Bulb Tem-
reversals from test initiation to final fracture.
5
peratures)
1.2 This test method is intended primarily for use with all
E 380 Practice for Use of International System of Units (SI)
advanced ceramic matrix composites with continuous fiber
6
(the Modernized Metric System)
reinforcement: unidirectional (1-D), bidirectional (2-D), wo-
E 1012 Practice for Verification of Specimen Alignment
ven, and tridirectional (3-D). In addition, this test method also
4
Under Tensile Loading
may be used with glass (amorphous) matrix composites with
1-D, 2-D, and 3-D continuous fiber reinforcement. This test
3. Terminology
method does not address directly discontinuous fiber-
3.1 Definitions—The definitions of terms relating to tensile
reinforced, whisker-reinforced or particulate-reinforced ceram-
testingappearinginTerminologyE 6applytothetermsusedin
ics, although the test methods detailed here may be equally
this test method. The definitions of terms relating to advanced
applicable to these composites. It should be noted that 3-D
ceramics appearing in Terminology C 1145 apply to the terms
architectures with a high volume fraction of fibers in the “z”
used in this test method. The definitions of terms relating to
direction may be difficult to test successfully.
fiber-reinforced composites appearing in Terminology D 3878
1.3 Values are in accordance with the International System
applytothetermsusedinthistestmethod.Pertinentdefinitions
of Units (SI) and Practice E 380.
as listed in Practice E 1012,Terminology C 1145,Terminology
1.4 This standard does not purport to address all of the
D 3878, and Terminology E 6 are shown in the following with
safety concerns, if any, associated with its use. It is the
the appropriate source given in brackets. Terms used in
responsibility of the user of this standard to establish appro-
conjunction with this test method are defined as follows:
priate safety and health practices and determine the applica-
2
Annual Book of ASTM Standards, Vol 15.01.
1 3
This test method is under the jurisdiction of ASTM Committee C28 on Annual Book of ASTM Standards, Vol 15.03.
4
Advanced Ceramics and is the direct responsibility of Subcommittee C28.07 on Annual Book of ASTM Standards, Vol 03.01.
5
Ceramic Matrix Composites. Annual Book of ASTM Standards, Vol 11.03.
6
Current edition approved June 10, 2000. Published October 2000. Discontinued 1997—Repla
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