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 Status: Withdrawn ยท Replaced by: ASTM E Metals — Mechanical Testing; Elevated and Low-Temperature Tests; Metallography(ASTM VOL ).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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Different resonant frequencies can be ee1876 dependent on the position of the support wires, the mechanical impulse and the microphone. Any specimen with a frequency response falling outside the prescribed frequency range is rejected.

Theory | IMCE – Your partner in the Impulse Excitation Technique

There is no requirement for complex support systems that require elaborate setup or alignment. The dynamic shear modulus, or modulus of rigidity, is found using torsional resonant vibrations. Test Methods CCC sstm, CCand C may differ from this test method in several areas for example; sample size, dimensional tolerances, sample preparation. Where adtm, the procedures, sample specifications and calculations are consistent with these test methods.

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

Flat plates may also axtm measured similarly, but the required equations for determining the moduli are not presented.

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. Link to Active This link will always route to the current Active version of the standard.

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Dynamic Young’s modulus and dynamic shear modulus are used to compute Poisson’s ratio. 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 Specimens of these materials possess specific mechanical resonant frequencies that are determined by the elastic modulus, mass, and geometry of the test specimen.

There e186 no requirement for complex support systems that require elaborate setup or alignment. 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. Dynamic Young’s modulus is determined using the adtm frequency in either the flexural or longitudinal mode of vibration.

Referenced Documents purchase separately The documents listed below are referenced within the subject aetm but are not provided as part of the standard. Dynamic Young’s modulus and dynamic shear modulus are used to compute Poisson’s ratio. Historical Version s – view previous versions of standard.

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

ASTM E1876 – 15

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.

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. Afterwards, the acquired vibration signal in the time domain is converted to the frequency domain by a fast Fourier transformation.

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Specimen descriptions should include any specific thermal treatments or environmental exposures that the specimens have received. No other units of measurement are included in this standard. 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.

A range of acceptable resonant frequencies is determined for a specimen with a particular geometry and mass. Link to Active This link will always route to the current Active version of the standard. 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. 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 The testing of these materials shall be done in compliance with these material specific standards.

Dynamic Young’s modulus and dynamic shear modulus are used to compute Poisson’s ratio. Where possible, the procedures, sample specifications and calculations are consistent with these test methods. Active view current version of asstm.

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

Specimens of these astk possess specific mechanical resonant frequencies that are determined by the elastic modulus, mass, and geometry of the test specimen.

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