EN 14186:2007
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Advanced technical ceramics - Mechanical properties of ceramic composites at room temperature - Determination of elastic properties by an ultrasonic technique
31-05-2008
28-11-2007
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Significance and use
6 Apparatus
6.1 Ultrasonic tank with thermostatic control
6.2 Temperature measurement device
6.3 Test specimen holder
6.4 Transducers
6.5 Transducer holders
6.6 Pulse generator
6.7 Signal recording system
7 Test specimens
8 Test specimen preparation
9 Test procedure
9.1 Choice of frequency
9.2 Establishment of the test temperature
9.3 Reference test without test specimen
9.4 Measurement with the specimen
10 Calculation
10.1 Delay
10.2 Calculation of the propagation velocities
10.3 Calculation of the refracted angle [theta][r]
10.4 Identification of the elastic constants, C[ij]
10.5 Back calculation of the phase velocities
10.6 Polar plots of the velocity curves
10.7 Calculation of the quadratic deviation
10.8 Calculation of the engineering constants
11 Test validity
11.1 Measurements
11.2 Criterion of validity for the reliability of
the C[ij] components
12 Test report
Annex A (informative) - Example of a presentation of the
results for a material with
orthothropic symmetry
A.1 Velocity curves
A.2 Stiffness matrix with stiffness components
A.3 Engineering constants
Bibliography
This European Standard specifies an ultrasonic method to determine the components of the elasticity tensor of ceramic matrix composite materials at room temperature. Young's moduli, shear moduli and Poisson coefficients, can be determined from the components of the elasticity tensor.
This European Standard applies to ceramic matrix composites with a continuous fibre reinforcement: unidirectional (1D), bidirectional (2D), and tridirectional (D, with 2 < 3) which have at least orthotropic symmetry, and whose material symmetry axes are known.
This method is applicable only when the ultrasonic wave length used is larger than the thickness of the representative elementary volume, thus imposing an upper limit to the frequency range of the transducers used.
NOTEProperties obtained by this method may not be comparable with moduli obtained by EN 658-1, EN 658-2 and EN 12289.
Committee |
CEN/TC 184
|
DevelopmentNote |
Supersedes ENV 14186. (02/2008)
|
DocumentType |
Standard
|
PublisherName |
Comite Europeen de Normalisation
|
Status |
Withdrawn
|
Standards | Relationship |
DIN EN 14186:2008-02 | Identical |
BS EN 14186:2007 | Identical |
PN EN 14186 : 2008 | Identical |
UNE-EN 14186:2007 | Identical |
UNI EN 14186 : 2008 | Identical |
NF EN 14186 : 2008 | Identical |
SN EN 14186 : 2008 | Identical |
I.S. EN 14186:2007 | Identical |
NS EN 14186 : 1ED 2007 | Identical |
NBN EN 14186 : 2008 | Identical |
NEN EN 14186 : 2007 | Identical |
UNI EN 14232 : 2009 | ADVANCED TECHNICAL CERAMICS - TERMS, DEFINITIONS AND ABBREVIATIONS |
09/30185903 DC : 0 | BS EN 14232 - ADVANCED TECHNICAL CERAMICS - TERMS, DEFINITIONS AND ABBREVIATIONS |
PREN 14232 : DRAFT 2009 | ADVANCED TECHNICAL CERAMICS - TERMS, DEFINITIONS AND ABBREVIATIONS |
EN 14232:2009 | Advanced technical ceramics - Terms, definitions and abbreviations |
BS EN 14232:2009 | Advanced technical ceramics. Terms, definitions and abbreviations |
I.S. EN 14232:2009 | ADVANCED TECHNICAL CERAMICS - TERMS, DEFINITIONS AND ABBREVIATIONS |
EN 1389:2003 | Advanced technical ceramics - Ceramic composites - Physical properties - Determination of density and apparent porosity |
ISO/IEC 17025:2005 | General requirements for the competence of testing and calibration laboratories |
ISO 653:1980 | Long solid-stem thermometers for precision use |
EN 658-1:1998 | Advanced technical ceramics - Mechanical properties of ceramic composites at room temperature - Part 1: Determination of tensile properties |
EN 12289:2005 | Advanced technical ceramics - Mechanical properties of ceramic composites at ambient temperature - Determination of in-plane shear properties |
EN 658-2:2002 | Advanced technical ceramics - Mechanical properties of ceramic composites at room temperature - Part 2: Determination of compression properties |
ISO 3611:2010 | Geometrical product specifications (GPS) — Dimensional measuring equipment: Micrometers for external measurements — Design and metrological characteristics |
CEN/TR 13233 : 2007 COR 2007 | ADVANCED TECHNICAL CERAMICS - NOTATIONS AND SYMBOLS |
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