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 Status: Withdrawn ยท Replaced by: ASTM E Metals — Mechanical Testing; Elevated and Low-Temperature Tests; Metallography(ASTM VOL ).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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The dynamic shear modulus, or modulus of rigidity, is found using torsional resonant vibrations. Specimens of these materials possess specific mechanical resonant frequencies that are determined by the elastic modulus, mass, and geometry of the test specimen.

ASTM E1876 – 15

Any specimen with a frequency response falling outside the prescribed frequency range is rejected. Dynamic Young’s modulus is determined using the resonant frequency in either the flexural or longitudinal mode of vibration. Dynamic Young’s modulus is determined using the resonant frequency in either the flexural or longitudinal mode of vibration.

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 asrm can be measured. The testing of these materials shall be done in compliance with these material specific standards. 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.

Any specimen with a frequency response falling outside the prescribed frequency range is rejected.

Theory | IMCE – Your partner in the Impulse Excitation Technique

Dynamic Young’s modulus and dynamic shear modulus are used to compute Poisson’s ratio. A range of acceptable resonant frequencies is determined for a specimen with a particular geometry and mass.

Dedicated software will axtm the resonant frequency with high accuracy to calculate the elastic properties based on the classical beam theory. The measurement principle is based on tapping the sample with a small projectile and recording the induced vibration signal with a microphone or laser vibrometer.

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Shear modulus To determine the shear modulus, the equipment measures the torsional vibration frequency see picture and calculates the shear modulus using the mass and dimensions of the sample according to the different standards ASTM E, ISOEN 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 Aetm Methods CCCCCand C may differ from this 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 material can be measured.

No other units of measurement are included in this standard.

There is no requirement for complex support systems that require elaborate setup or alignment. Afterwards, the acquired vibration signal in the time domain is converted to the frequency domain by a fast Fourier transformation. No other units of measurement are included in this standard.

Internal friction Material damping or internal friction is characterized by the decay of the vibration amplitude of the sample in free e18766 as the logarithmic decrement. 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.

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

Where possible, the procedures, sample specifications and calculations are consistent with these test methods. Specimens of these materials possess specific mechanical resonant frequencies that are determined by the elastic modulus, mass, and geometry of the test specimen. 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.

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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. Referenced Documents purchase e18766 The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Historical Version s – view previous versions of standard. The specimens are subjected to minute strains; hence, the moduli are measured at or near the origin of the stress-strain curve, with the minimum possibility of fracture.

The testing of these materials shall be done in compliance with these material specific standards. 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.

Dynamic Young’s modulus and dynamic shear modulus are used to compute Poisson’s ratio. The ashm behaviour originates from anelastical processes occurring in a strained solid i. Specimen descriptions should include any specific thermal treatments or environmental exposures that the specimens have received.

Active view current version of standard. The specimens are subjected to minute strains; hence, the moduli are measured at or near the origin of the stress-strain curve, with the minimum possibility of fracture.

No other units of measurement are included 1e876 this standard.

The testing of these materials shall be done in compliance with these material specific standards. 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 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.

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