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 Status: Withdrawn ยท Replaced by: ASTM E Metals — Mechanical Testing; Elevated and Low-Temperature Tests; Metallography(ASTM VOL ).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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Test Methods CCCCCand C may differ from this test method in several areas for example; sample size, dimensional tolerances, sample preparation. The damping behaviour originates from anelastical processes occurring in a strained solid i.

Link to Active Asym link will always route to the current Active version of the standard. Dynamic Young’s modulus is determined using the resonant frequency in either the flexural or longitudinal mode of vibration. The dynamic shear modulus, or modulus of rigidity, is found using torsional resonant vibrations. It is the responsibility of ast user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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

Theory | IMCE – Your partner in the Impulse Excitation Technique

Test Methods CCAxtmCCand C may differ from this test method in several areas for example; sample size, dimensional tolerances, sample preparation. A range of acceptable resonant frequencies is determined for a specimen with a particular geometry and mass. Internal friction Material damping or internal friction is characterized by the decay of the vibration amplitude of the sample in free vibration as asfm logarithmic decrement.

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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.

Specimens of these materials possess specific mechanical resonant frequencies that are determined by the elastic modulus, mass, and geometry of the test e186. No other units of measurement are included in this standard.

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.

Different resonant frequencies can be excited dependent on the position of the support wires, the mechanical impulse and the microphone. Test Methods CCCCCand C may differ from this test method in several areas for example; sample size, dimensional tolerances, sample preparation.

There is no requirement for complex support systems that require elaborate setup or alignment. No other units of measurement are included in this standard. Flat plates may also be measured similarly, but the required equations for determining the moduli are not presented.

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

The dynamic shear modulus, or modulus of rigidity, is found using torsional resonant vibrations. Active view current version of standard. A range of acceptable resonant frequencies is determined for a specimen with a particular geometry and mass. Where possible, the procedures, sample specifications and e8176 are consistent with these test methods. There is no requirement for complex support systems that require elaborate setup or alignment.

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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. 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 the resonant frequency in either 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.

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 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.