ASTM E1876 PDF

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 Status: Withdrawn ยท Replaced by: ASTM E Metals — Mechanical Testing; Elevated and Low-Temperature Tests; Metallography(ASTM VOL ).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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Theory | IMCE – Your partner in the Impulse Excitation Technique

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

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 Historical Version s – view previous versions of standard.

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 is determined using asmt resonant frequency in either the e11876 or longitudinal mode of vibration. Dynamic Young’s modulus and dynamic shear modulus are used to compute Poisson’s ratio.

The actual dynamic elastic modulus astn 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. There is no requirement for complex support systems that require elaborate setup or alignment. Dedicated software will determine the resonant frequency with high accuracy to calculate the elastic properties based on the classical beam theory.

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Active view current version of standard. The xstm of these materials shall be done in compliance with these material specific standards.

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. Dynamic Young’s modulus is determined using the resonant frequency in either the flexural or longitudinal mode of vibration. Test Methods CCCCCand C may differ from this test method in several areas for example; sample size, dimensional tolerances, sample preparation.

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

No other units of measurement are included in this standard. It is e18776 responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Afterwards, the acquired vibration signal in the time domain is converted to the frequency domain by a fast Fourier transformation.

ASTM E1876 – 15

e18876 Flat plates may also be measured similarly, but the required equations for determining the moduli are not presented. 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. No other units of measurement are included in this standard.

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The dynamic atm modulus, or modulus of rigidity, is found using torsional resonant vibrations. There is no requirement for complex support systems that require elaborate setup or alignment. Any specimen with a frequency response falling outside the prescribed frequency range is rejected. Specimens of these materials possess specific mechanical resonant frequencies that are determined by the elastic modulus, mass, and geometry of the test specimen. The damping behaviour originates from anelastical processes occurring in a strained solid i.

Flat plates may also be measured similarly, but the required equations for determining the moduli are e8176 presented.

The dynamic elastic properties of a material can therefore be astk 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 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 in this standard. Link to Active This link will always route astj the current Active version of the standard. Specimen descriptions should include any specific thermal treatments or environmental exposures that the specimens have received.