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 Status: Withdrawn ยท Replaced by: ASTM E Metals — Mechanical Testing; Elevated and Low-Temperature Tests; Metallography(ASTM VOL ).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. Specimen descriptions should include any specific thermal treatments or environmental exposures that the specimens have received. Any specimen with a frequency response falling outside the prescribed frequency range is rejected. 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.

Historical Version s – view previous versions of standard.

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 Different resonant frequencies can be excited dependent on the position of the support wires, the mechanical impulse and the microphone. No other units of measurement are included in this standard. 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.

Flat plates may also be measured similarly, but the required equations for determining the moduli are not presented. The testing of these materials shall be done in compliance with these material specific standards. Test Methods CCCCCand C may differ from this test method in several areas for example; sample size, dimensional tolerances, sample preparation.

Theory | IMCE – Your partner in the Impulse Excitation Technique

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 Link to Active This link will always route to the current Active version of the standard. A range of acceptable resonant frequencies is determined for a specimen with a particular geometry and mass. Material damping or internal friction is characterized by the decay of the vibration amplitude of the sample in free vibration as the logarithmic decrement.

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Young’s modulus To determine the Young’s modulus, the equipment measures the flexural vibration frequency see picture and 1e876 the Young’s modulus using the mass and dimensions of the sample according to the different standards ASTM E, ISOEN Where possible, the procedures, sample specifications and calculations are consistent with these test methods. Dedicated software will determine the resonant frequency with high accuracy to calculate the elastic properties based on the classical beam theory.

Specimens of these materials possess specific mechanical resonant frequencies that are determined by the elastic modulus, mass, and geometry of the test specimen. Test Methods CCCCCand C may differ from this test method in several areas for example; sample size, dimensional tolerances, sample preparation. Dynamic Young’s modulus is determined using the resonant frequency in aetm the flexural or longitudinal mode of vibration.

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. Where possible, the procedures, sample specifications and calculations are consistent with e18876 test methods. There is no requirement for complex support asgm that require elaborate setup or alignment.

The dynamic shear modulus, or modulus of rigidity, is found using torsional resonant vibrations. 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 Specimen descriptions should include any specific thermal treatments or environmental exposures that the specimens have received.

The dynamic elastic properties sstm 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. Dynamic Young’s modulus is determined using the e1867 frequency in either the flexural or longitudinal mode of vibration.

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Internal friction Material damping or internal friction is characterized by the decay of the vibration amplitude of the sample in free vibration as the logarithmic decrement. Dynamic Young’s modulus is determined using the resonant frequency in either the flexural or longitudinal mode of vibration.

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. No other units of measurement are included in this standard. Test Methods CCCCCand C may differ from this test method in several areas for example; sample size, dimensional tolerances, sample preparation.

ASTM E1876 – 15

No other units of measurement are included in this standard. A range of acceptable resonant frequencies is determined for a specimen with a particular geometry and mass.

Dynamic Young’s modulus and dynamic shear modulus are used to compute Poisson’s ratio. Afterwards, the acquired vibration signal in the time domain is converted to the frequency domain by a fast Fourier transformation. The testing of these materials shall be done in compliance with these material specific standards. There is no requirement for complex support systems that require elaborate setup or alignment.

Dynamic Young’s modulus and dynamic shear modulus are used to compute Poisson’s ratio. The testing of these materials shall be done in compliance with these material specific standards. 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 separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.