DD ENV 14186:2002
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.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. Ceramic composites. Mechanical properties at room temperature, determination of elastic properties by an ultrasonic technique
Hardcopy , PDF
01-31-2008
English
11-18-2002
Foreword
1 Scope
2 Normative references
3 Principle
4 Significance and use
5 Terms and definitions and symbol
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
9.4.1 Measurement of the bulk density and of the
thickness
9.4.2 Mounting of the specimen
9.4.3 Acquisition of different angles of incidence
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]
10.4.1 Basic considerations
10.4.2 Calculation of C[33]
10.4.3 Calculation of C[22], C[23] and C[44]
10.4.5 Calculation of C[12] and C[66]
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
Bibliography
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