ASTM C1425-2005 Standard Test Method for Interlaminar Shear Strength of 1-D and 2-D Continuous Fiber-Reinforced Advanced Ceramics at Elevated Temperatures《高温下1-D和2-D连续纤维增强高级陶瓷层间剪切强.pdf
《ASTM C1425-2005 Standard Test Method for Interlaminar Shear Strength of 1-D and 2-D Continuous Fiber-Reinforced Advanced Ceramics at Elevated Temperatures《高温下1-D和2-D连续纤维增强高级陶瓷层间剪切强.pdf》由会员分享,可在线阅读,更多相关《ASTM C1425-2005 Standard Test Method for Interlaminar Shear Strength of 1-D and 2-D Continuous Fiber-Reinforced Advanced Ceramics at Elevated Temperatures《高温下1-D和2-D连续纤维增强高级陶瓷层间剪切强.pdf(8页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C 1425 05Standard Test Method forInterlaminar Shear Strength of 1D and 2D ContinuousFiber-Reinforced Advanced Ceramics at ElevatedTemperatures1This standard is issued under the fixed designation C 1425; the number immediately following the designation indicates the year oforiginal adopt
2、ion or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method addresses the compression of a double-notched specimen
3、to determine interlaminar shear strength ofcontinuous fiber-reinforced ceramic composites (CFCCs) atelevated temperatures. Specimen preparation methods andrequirements, testing modes (load or displacement control),testing rates (load rate or displacement rate), data collection,and reporting procedur
4、es are addressed.1.2 This test method is used for testing advanced ceramic orglass matrix composites with continuous fiber reinforcementhaving a laminated structure such as in unidirectional (1-D) orbidirectional (2-D) fiber architecture (lay-ups of unidirectionalplies or stacked fabric). This test
5、method does not addresscomposites with nonlaminated structures, such as (3-D) fiberarchitecture or discontinuous fiber-reinforced, whisker-reinforced, or particulate-reinforced ceramics.1.3 Values expressed in this test method are in accordancewith the International System of Units (SI) and IEEE/AST
6、MSI 10.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. Specifi
7、c precau-tionary statements are noted in 8.1 and 8.2.2. Referenced Documents2.1 ASTM Standards:2C 1145 Terminology on Advanced CeramicsC 1292 Test Method for Shear Strength of ContinuousFiber-Reinforced Ceramics at Ambient TemperaturesD 695 Test Method for Compressive Properties of RigidPlasticsD 38
8、46 Test Method for In-Plane Shear Strength of Rein-forced PlasticsD 3878 Terminology for Composite MaterialsE4 Practices for Force Verification of Testing MachinesE6 Terminology Relating to Methods of Mechanical Test-ingE 122 Practice for Calculating Sample Size to Estimate,With a Specified Tolerabl
9、e Error, the Average for Charac-teristic of a Lot or ProcessE 220 Test Method for Calibration of Thermocouples byComparison TechniquesE 230 Specification and Temperature-Electromotive Force(EMF) Tables for Standardized ThermocouplesE 337 Test Method for Measuring Humidity with a Psy-chrometer (the M
10、easurement of Wet-Bulb and Dry-BulbTemperatures)IEEE/ASTM SI 10 American National Standard for Use ofthe International System of Units (SI): The Modern MetricSystem3. Terminology3.1 DefinitionsThe definitions of terms relating to shearstrength testing appearing in Terminology E6 apply to theterms us
11、ed in this test method. The definitions of terms relatingto advanced ceramics appearing in Terminology C 1145 applyto the terms used in this test method. The definitions of termsrelating to fiber-reinforced composites appearing in Terminol-ogy D 3878 apply to the terms used in this test method.4. Su
12、mmary of Test Method4.1 This test method addresses the determination of theinterlaminar shear strength of CFCCs at elevated temperatures.The interlaminar shear strength of CFCCs, as determined bythis test method, is measured by loading in compression adouble-notched specimen of uniform width. Failur
13、e of thespecimen occurs by interlaminar shear between two centrallylocated notches machined halfway through the thickness of thespecimen and spaced a fixed distance apart on opposing faces.Schematics of the loading mode and the specimen are shown in1This test method is under the jurisdiction of ASTM
14、 Committee C28 onAdvanced Ceramics and is the direct responsibility of Subcommittee C28.07 onCeramic Matrix Composites.Current edition approved Feb. 1, 2005. Published April 2005. Originallyapproved in 1999. Last previous edition approved in 1999 as C 1425 99.2For referenced ASTM standards, visit th
15、e ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,
16、United States.Fig. 1. The procedures in this test method are similar to thosein Test Method C 1292 for the determination of the interlami-nar shear strength of CFCCs at ambient temperature, exceptthat the considerations for conducting the test at elevatedtemperatures are addressed in this test metho
17、d.5. Significance and Use5.1 Continuous fiber-reinforced ceramic composites arecandidate materials for structural applications requiring highdegrees of wear and corrosion resistance, and damage toler-ance at high temperatures.5.2 The 1-D and 2-D CFCCs are highly anisotropic andtheir transthickness t
18、ensile and interlaminar shear strength arelower than their in-plane tensile and in-plane shear strength,respectively.5.3 Shear tests provide information on the strength anddeformation of materials under shear stresses.5.4 This test method may be used for material development,material comparison, qua
19、lity assurance, characterization, anddesign data generation.5.5 For quality control purposes, results derived from stan-dardized shear test specimens may be considered indicative ofthe response of the material from which they were taken forgiven primary processing conditions and post-processing heat
20、treatments.6. Interferences6.1 Test environment (vacuum, inert gas, ambient air, and soforth) including moisture content (for example, relative humid-ity) may have an influence on the measured interlaminar shearstrength. In particular, the behavior of materials susceptible toslow crack growth will b
21、e strongly influenced by test environ-ment and testing rate. Testing to evaluate the maximumstrength potential of a material shall be conducted in inertenvironments or at sufficiently rapid testing rates, or both, so asto minimize slow crack growth effects. Conversely, testing canbe conducted in env
22、ironments and testing modes and ratesrepresentative of service conditions to evaluate material per-formance under those conditions. When testing is conducted inuncontrolled ambient air with the objective of evaluatingmaximum strength potential, relative humidity and temperaturemust be monitored and
23、reported. Testing at humidity levels65 % RH is not recommended and any deviations from thisrecommendation must be reported.6.2 Preparation of test specimens, although normally notconsidered a major concern with CFCCs, can introduce fabri-cation flaws which may have pronounced effects on themechanica
24、l properties and behavior (for example, shape andlevel of the resulting load-displacement curve and shearstrength). Machining damage introduced during specimenpreparation can be either a random interfering factor in thedetermination of shear strength of pristine material, or aninherent part of the s
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