Posted on March 24, 2019

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 Status: Withdrawn ยท Replaced by: ASTM E Metals — Mechanical Testing; Elevated and Low-Temperature Tests; Metallography(ASTM VOL ).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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No other units of measurement are included in this standard.

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. Active view current version of standard.

ASTM E1876 – 15

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

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

Where possible, the procedures, sample specifications and calculations are consistent with these test methods. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Dynamic Young’s modulus and dynamic shear modulus are used to compute Poisson’s ratio. Dedicated software will determine the resonant frequency with high accuracy to calculate the elastic properties based on the classical beam theory.

Specimens awtm these materials possess specific mechanical resonant frequencies that are determined by the elastic modulus, mass, and geometry of the test specimen. To f1876 the shear modulus, the equipment measures the torsional vibration frequency see picture and calculates the e187 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.

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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. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the 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 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. Internal friction Material damping or internal friction is characterized by the decay of the vibration amplitude of the sample in free vibration atm the logarithmic decrement.

qstm Dynamic Young’s modulus is determined using the resonant frequency in either the flexural or longitudinal mode of vibration. Any specimen with a frequency response falling outside the prescribed frequency range is rejected. 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 damping behaviour originates from anelastical processes occurring in a strained solid i.

No other units of measurement are included in this standard. The actual dynamic elastic modulus of each specimen need not be determined as e18766 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 dynamic shear modulus, or modulus of rigidity, is found using torsional resonant vibrations.

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Where possible, the procedures, sample specifications and calculations are consistent with these test methods. There is no requirement for complex support systems that require elaborate setup or alignment. Different resonant r1876 can be excited dependent on the position of the support wires, the mechanical impulse and the microphone. Where possible, the procedures, sample specifications and calculations are consistent with these test methods.

Theory | IMCE – Your partner in the Impulse Excitation Technique

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

Flat plates may also be measured similarly, but the required equations for determining the moduli are not presented. Specimens of these materials possess specific mechanical resonant frequencies that are determined by the elastic modulus, mass, and geometry of the test specimen.

Historical Version atm – view previous versions of standard. The dynamic shear modulus, or modulus of rigidity, is found using torsional resonant vibrations.

The dynamic shear modulus, or modulus of rigidity, is found using torsional resonant vibrations. 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.

Link to Active This link will always route to the current Active version of the standard. Dynamic Young’s modulus and dynamic shear modulus are used to compute Poisson’s ratio.

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

The testing of these materials shall be done in compliance with these material specific standards. No other units of measurement are included in this standard. Dynamic Young’s modulus is determined using the resonant frequency in either the flexural asfm longitudinal mode of vibration.