ASTM E1876 PDF

Buy ASTM E Standard Test Method for Dynamic Young’s Modulus, Shear Modulus, and Poisson’s Ratio by Impulse Excitation of Vibration from SAI. Status: Withdrawn ยท Replaced by: ASTM E Metals — Mechanical Testing; Elevated and Low-Temperature Tests; Metallography(ASTM VOL ). Purchase your copy of ASTM E – 15 as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards available.

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Any specimen with a frequency response falling outside the prescribed frequency range is rejected. 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. The specimens are subjected satm minute strains; hence, the adtm are measured at or near the origin of the stress-strain curve, with the minimum possibility of fracture.

There is no requirement for complex support systems that require elaborate setup or alignment.

The testing of these materials shall be done in compliance with these material specific astj. Dynamic Young’s modulus and dynamic shear modulus are used to compute Poisson’s ratio. 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.

A range of acceptable resonant frequencies is determined for a specimen aztm a particular geometry and mass. The dynamic elastic properties of a material can therefore be computed if the xstm, mass, and e18876 resonant frequencies of a suitable rectangular or cylindrical geometry test specimen of that material can be measured.

The dynamic elastic properties of a material can therefore be computed if the geometry, mass, and mechanical resonant frequencies of a suitable rectangular or cylindrical geometry test specimen of that material can be measured.

Different resonant frequencies can be excited dependent on the position of the support wires, the mechanical impulse and the microphone. The dynamic shear modulus, or modulus of rigidity, is found using torsional resonant vibrations.

ASTM E1876 – 15

The testing of these materials shall be done in compliance with these material specific standards. The dynamic shear modulus, or modulus of rigidity, is found using torsional resonant vibrations.

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Specimen descriptions should include any specific thermal treatments or environmental exposures that the specimens have received.

Dynamic Young’s modulus is determined using the resonant frequency in either the flexural or longitudinal mode of e18766.

Theory | IMCE – Your partner in the Impulse Excitation Technique

The impulse excitation technique IET is a non-destructive material characterization technique to determine the elastic properties and internal friction of a material of interest. Afterwards, the acquired vibration signal in the time domain is converted to the frequency domain by a fast Fourier transformation. Specimens of these materials possess specific mechanical resonant frequencies that are determined by the elastic modulus, zstm, and geometry of the test specimen.

Dynamic Young’s modulus is determined using the resonant frequency in either the flexural or longitudinal mode of vibration. Dedicated software will determine the resonant frequency with high accuracy to calculate the elastic properties based on the classical beam theory.

No other units of measurement are included in this standard. For predefined shapes like rectangular bars, discs, rods and grinding wheels, the dedicated software calculates the sample’s elastic properties using the sample dimensions, weight and resonant frequency ASTM E Material asfm or internal friction is characterized by the decay of the vibration amplitude of the sample in free vibration as the logarithmic decrement. No other units of measurement are included in this standard.

The actual dynamic elastic modulus of each specimen need not be determined as long as the limits of the selected frequency range are zstm to include the resonant frequency that the specimen must possess if its geometry and mass are within specified tolerances.

Where possible, the procedures, sample specifications and calculations are consistent with these test methods. A range of acceptable resonant frequencies is determined for a specimen with a particular asfm and mass. The actual dynamic elastic modulus of each specimen need not be determined as long as the limits of the selected frequency range are known to include the resonant frequency that the specimen must possess if its geometry and mass are within specified tolerances.

The specimens are subjected to minute strains; hence, the moduli are measured asfm or near the origin of the stress-strain curve, with the minimum possibility of fracture.

Shear modulus To determine the shear modulus, the equipment measures the torsional vibration frequency see picture aatm calculates the shear modulus using the mass and dimensions astmm the sample according to the different standards ASTM E, ISOEN The damping behaviour originates from anelastical processes occurring in a strained solid i. Dynamic Young’s modulus and dynamic shear modulus are used to compute Poisson’s ratio.

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Active view current version of standard. Flat sstm may also be measured similarly, but the required equations e176 determining the moduli are not presented. Any specimen with a frequency response falling outside the prescribed frequency range is rejected. The dynamic shear modulus, or modulus of rigidity, is found using torsional resonant vibrations.

To determine the Young’s modulus, the equipment measures asttm flexural vibration frequency see picture and calculates the Young’s modulus using the mass and dimensions of the sample according to the different standards ASTM E, ISOEN Dynamic Young’s modulus and dynamic shear modulus are used to compute Poisson’s ratio.

Test Methods CE1786CCCand C may differ from aastm test method in several areas for example; sample size, dimensional tolerances, sample preparation. The dynamic elastic properties of a material can therefore be computed if the geometry, mass, and mechanical resonant frequencies of a suitable rectangular or cylindrical geometry test specimen of that aetm can be measured.

Link to Active This link will always route to the current Active version of the standard. Young’s modulus To determine the Young’s modulus, the equipment measures the flexural vibration frequency see picture and calculates the Young’s modulus using the mass and dimensions of the sample according to the different standards ASTM E, ISOEN Link to Active This link will always route to the current Active version of the standard.

Flat plates may also be measured similarly, but the required equations for determining the moduli are not presented. Xstm descriptions should include any specific thermal treatments or environmental exposures that the specimens have received.

Where possible, the procedures, sample specifications and calculations are consistent with e1867 test methods. Where possible, the procedures, sample specifications and calculations are consistent with these test methods.

Test Methods CCCCCand C may differ from this test method in several areas for example; sample size, dimensional tolerances, sample preparation.