ASTM E1876 PDF

ICS: Total price excl. View cart. Sprog en. Add to basket. Antal Enheder 1 device.

Author:Zulujar Kazrajinn
Country:Liberia
Language:English (Spanish)
Genre:Medical
Published (Last):13 June 2005
Pages:141
PDF File Size:13.61 Mb
ePub File Size:18.83 Mb
ISBN:907-7-71985-898-2
Downloads:36837
Price:Free* [*Free Regsitration Required]
Uploader:Dilabar



Impulse excitation technique. 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. 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.

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

Dedicated software will determine the resonant frequency with high accuracy to calculate the elastic properties based on the classical beam theory. Different resonant frequencies can be excited dependent on the position of the support wires, the mechanical impulse and the microphone.

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 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, ISO , EN 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, ISO , EN 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.

The damping behaviour originates from anelastical processes occurring in a strained solid i. Home Theory. 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, ISO , EN 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, ISO , EN Material damping or internal friction is characterized by the decay of the vibration amplitude of the sample in free vibration as the logarithmic decrement.

DOORKING 2351 PDF

ASTM E1876 - 15

Skip to search form Skip to main content You are currently offline. Some features of the site may not work correctly. This standard is issued under the fixed designation E ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. Scope 1. Save to Library.

INTRODUCTION TO ALGORITHMS SMA 5503 PDF

ASTM E1876 - 15

Impulse excitation technique. 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. 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. Afterwards, the acquired vibration signal in the time domain is converted to the frequency domain by a fast Fourier transformation. Dedicated software will determine the resonant frequency with high accuracy to calculate the elastic properties based on the classical beam theory. Different resonant frequencies can be excited dependent on the position of the support wires, the mechanical impulse and the microphone. 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

JAY RUBIN HARUKI MURAKAMI AND THE MUSIC OF WORDS PDF

Active view current version of standard. Other Historical Standards. More E Specimens of these materials possess specific mechanical resonant frequencies that are determined by the elastic modulus, mass, and geometry of the test specimen. 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. 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.

BARRO R.J.AND X.SALA-I-MARTIN 1995 ECONOMIC GROWTH PDF

.

Related Articles