ASTM C1323-10
(Test Method)Standard Test Method for Ultimate Strength of Advanced Ceramics with Diametrally Compressed C-Ring Specimens at Ambient Temperature
Standard Test Method for Ultimate Strength of Advanced Ceramics with Diametrally Compressed C-Ring Specimens at Ambient Temperature
SIGNIFICANCE AND USE
This test method may be used for material development, material comparison, quality assurance, and characterization. Extreme care should be exercised when generating design data.
For a C-ring under diametral compression, the maximum tensile stress occurs at the outer surface. Hence, the C-ring specimen loaded in compression will predominately evaluate the strength distribution and flaw population(s) on the external surface of a tubular component. Accordingly, the condition of the inner surface may be of lesser consequence in specimen preparation and testing.
Note 1—A C-ring in tension or an O-ring in compression may be used to evaluate the internal surface.
The flexure stress is computed based on simple curved-beam theory (1, 2, 3, 4, 5). It is assumed that the material is isotropic and homogeneous, the moduli of elasticity are identical in compression or tension, and the material is linearly elastic. These homogeneity and isotropy assumptions preclude the use of this standard for continuous fiber reinforced composites. Average grain size(s) should be no greater than one fiftieth (1/50) of the C-ring thickness. The simple curved-beam theory stress solution is in good agreement (typically better than 1%) with a theory of elasticity solution as discussed in (3) for the geometries chosen for this standard. The simple beam theory stress equations are relatively simple. They are relatively easy to integrate for Weibull effective volume or effective area computations as shown in Appendix X1.
The simple curved beam and theory of elasticity stress solutions both are two-dimensional plane stress solutions. They do not account for stresses in the axial (parallel to b) direction, or variations in the circumferential (hoop, σθ) stresses through the width (b) of the test piece. The variations in the circumferential stresses increase with increases in width (b) and ring thickness (t). The variations can be substantial (> 10 %) for test specimens with large b. The circ...
SCOPE
1.1 This test method covers the determination of ultimate strength under monotonic loading of advanced ceramics in tubular form at ambient temperatures. The ultimate strength as used in this test method refers to the strength obtained under monotonic compressive loading of C-ring specimens such as shown in Fig. 1 where monotonic refers to a continuous nonstop test rate with no reversals from test initiation to final fracture. This method permits a range of sizes and shapes since test specimens may be prepared from a variety of tubular structures. The method may be used with microminiature test specimens.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.2.1 Values expressed in this test method are in accordance with the International System of Units (SI) and .
1.3 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.
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Designation:C1323 −10
StandardTest Method for
Ultimate Strength of Advanced Ceramics with Diametrally
1
Compressed C-Ring Specimens at Ambient Temperature
This standard is issued under the fixed designation C1323; 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* C1322Practice for Fractography and Characterization of
Fracture Origins in Advanced Ceramics
1.1 This test method covers the determination of ultimate
C1368 Test Method for Determination of Slow Crack
strength under monotonic loading of advanced ceramics in
Growth Parameters of Advanced Ceramics by Constant
tubular form at ambient temperatures.The ultimate strength as
Stress-Rate Strength Testing at Ambient Temperature
used in this test method refers to the strength obtained under
C1683Practice for Size Scaling of Tensile Strengths Using
monotonic compressive loading of C-ring specimens such as
Weibull Statistics for Advanced Ceramics
shown in Fig. 1 where monotonic refers to a continuous
E4Practices for Force Verification of Testing Machines
nonstop test rate with no reversals from test initiation to final
E6Terminology Relating to Methods of MechanicalTesting
fracture.Thismethodpermitsarangeofsizesandshapessince
E337Test Method for Measuring Humidity with a Psy-
test specimens may be prepared from a variety of tubular
chrometer (the Measurement of Wet- and Dry-Bulb Tem-
structures. The method may be used with microminiature test
peratures)
specimens.
IEEE/ASTM SI 10American National Standard for Use of
1.2 The values stated in SI units are to be regarded as
theInternationalSystemofUnits(SI):TheModernMetric
standard. No other units of measurement are included in this
System
standard.
1.2.1 Valuesexpressedinthistestmethodareinaccordance
3. Terminology
withtheInternationalSystemofUnits(SI)andIEEE/ASTMSI
3.1 Definitions:
10.
3.1.1 advanced ceramic—an engineered, high-performance,
1.3 This standard does not purport to address all of the
predominatelynonmetallic,inorganic,ceramicmaterialhaving
safety concerns, if any, associated with its use. It is the
specific functional qualities. (C1145)
responsibility of the user of this standard to establish appro-
3.1.2 breakingload—theloadatwhichfractureoccurs. (E6)
priate safety and health practices and determine the applica-
3.1.3 C-ring—circular test specimen geometry with the
bility of regulatory limitations prior to use.
mid-section (slot) removed to allow bending displacement
(compression or tension). (E6)
2. Referenced Documents
2
3.1.4 flexural strength—a measure of the ultimate strength
2.1 ASTM Standards:
of a specified beam in bending.
C1145Terminology of Advanced Ceramics
C1161Test Method for Flexural Strength of Advanced 3.1.5 modulus of elasticity—the ratio of stress to corre-
Ceramics at Ambient Temperature
sponding strain below the proportional limit. (E6)
C1239Practice for Reporting Uniaxial Strength Data and
3.1.6 slow crack growth—subcritical crack growth (exten-
Estimating Weibull Distribution Parameters forAdvanced
sion) which may result from, but is not restricted to, such
Ceramics
mechanisms as environmentally assisted stress corrosion or
diffusive crack growth.
1
This test method is under the jurisdiction of ASTM Committee C28 on
4. Significance and Use
Advanced Ceramics and is the direct responsibility of Subcommittee C28.04 on
Applications.
4.1 Thistestmethodmaybeusedformaterialdevelopment,
Current edition approved Jan. 1, 2010. Published March 2010. Originally
material comparison, quality assurance, and characterization.
ε1
approved in 1996. Last previous edition approved in 2001 as C1323–96 (2001) .
Extremecareshouldbeexercisedwhengeneratingdesigndata.
DOI: 10.1520/C1323-10.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.2 For a C-ring under diametral compression, the maxi-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
mum tensile stress occurs at the outer surface. Hence, the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. C-ring specimen loaded in compression will predominately
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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C1323−10
FIG. 1 C-Ring Test Geometry with Defining Geometry and Reference Angle (θ) for the Point of Fracture Initiation on the Circumference
evaluate the strength distribution and flaw population(s) on the ferential stresses increase with increases in width (b)
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation:C1323–96 (Reapproved 2001) Designation: C1323 – 10
Standard Test Method for
Ultimate Strength of Advanced Ceramics with Diametrally
1
Compressed C-Ring Specimens at Ambient Temperature
This standard is issued under the fixed designation C1323; 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
´ NOTE—Equation X1.2 was editorially corrected in April 2007.
1. Scope
1.1Thistestmethodcoversthedeterminationofultimatestrengthundermonotonicloadingofadvancedceramicsintubularform
at ambient temperatures. Note that ultimate strength as used in this test method refers to the strength obtained under monotonic
compressive loading of C-ring specimens where monotonic refers to a continuous nonstop test rate with no reversals from test
initiation to final fracture.
1.2Values expressed in this test method are in accordance with the International System of Units (SI) and Practice E380*
1.1 This test method covers the determination of ultimate strength under monotonic loading of advanced ceramics in tubular
form at ambient temperatures. The ultimate strength as used in this test method refers to the strength obtained under monotonic
compressive loading of C-ring specimens such as shown in Fig. 1 where monotonic refers to a continuous nonstop test rate with
no reversals from test initiation to final fracture. This method permits a range of sizes and shapes since test specimens may be
prepared from a variety of tubular structures. The method may be used with microminiature test specimens.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.2.1 Values expressed in this test method are in accordance with the International System of Units (SI) and IEEE/ASTM SI
10.
1.3 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.
2. Referenced Documents
2
2.1 ASTM Standards:
C1145 Terminology of Advanced Ceramics
C1161 Test Method for Flexural Strength of Advanced Ceramics at Ambient Temperature
C1239 Practice for Reporting Uniaxial Strength Data and Estimating Weibull Distribution Parameters forAdvanced Ceramics
C1322 Practice for Fractography and Characterization of Fracture Origins in Advanced Ceramics
C1368 Test Method for Determination of Slow Crack Growth Parameters of Advanced Ceramics by Constant Stress-Rate
Flexural Testing at Ambient Temperature
C1683 Practice for Size Scaling of Tensile Strengths Using Weibull Statistics for Advanced Ceramics
E4 Practices for Force Verification of Testing Machines
E6 Terminology Relating to Methods of Mechanical Testing
E337 Test Method for Measuring Humidity with a Psychrometer (the Measurement of Wet- and Dry-Bulb Temperatures)
E380Practice for Use of International System of Units (SI) (the Modernized Metric System)
2.2 Military Standards:
MIL-HDBK-790Fractography and Characterization of Fracture Origins in Advanced Structural Ceramics
MIL-STD-1942(A)Flexural Strength of High Performance Ceramics at Ambient Temperature IEEE/ASTM SI 10 American
National Standard for Use of
the International System of
1
This test method is under the jurisdiction of ASTM Committee C28 on Advanced Ceramics and is the direct responsibility of Subcommittee C28.04 on Applications.
Current edition approved April 10, 2001. Published April 2001. Originally approved in 1996. Last previous edition approved in 2001 as C1323–96(2001). DOI:
10.1520/C1323-96R01E01.
e1
Current edition approved Jan. 1, 2010. Published March 2010. Originally approved in 1996. Last previous edition approved in 2007 as C1323–96(2001) . DOI:
10.1520/C1323-10.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book ofASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
C1323 – 10
FIG. 1 C-Ring Test Geometry
...
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