• There are no items in your cart

EN 14186:2007

Withdrawn

Withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.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

Withdrawn date

31-05-2008

Published date

28-11-2007

Sorry this product is not available in your region.

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

Access your standards online with a subscription

Features

  • Simple online access to standards, technical information and regulations.

  • Critical updates of standards and customisable alerts and notifications.

  • Multi-user online standards collection: secure, flexible and cost effective.