Correction Procedure of Wave Signals for a Viscoelastic Split Hopkinson Pressure Bar
Journal Title: Problemy Mechatroniki. Uzbrojenie, lotnictwo, inżynieria bezpieczeństwa - Year 2016, Vol 7, Issue 1
Abstract
A polymeric split Hopkinson pressure bar technique (SHPB) is preferred for testing materials with low mechanical impedance. However, the use of polymeric bars requires additional analysis for data reduction, temperature complications and additional restrictions compared with traditional metallic pressure bars. A viscoelastic material, such as PMMA, exhibits both wave attenuation and wave dispersion. When a wave travels through a polymer bar, the wave amplitude decreases due to attenuation and the wave shape becomes distorted. Therefore, signals measured at given positions on a viscoelastic bar do not represent the pulse at another position along the pressure bar without complex corrections. This paper is concerned with the problem of correction of dispersion and attenuation of waves in the viscoelastic SHPB. It has been demonstrated that the Fast Fourier Transform (FFT) spectral analysis method used to reconstruct wave profiles on the measured signals which are being distorted by wave attenuation and dispersion effects is valid and allows for obtaining satisfactory results for tire rubber.
Authors and Affiliations
Jacek JANISZEWSKI, Witold BUŻANTOWICZ, Paweł BARANOWSKI
Keywords
Related Articles
- EP ID EP77639
- DOI 10.5604/20815891.1195198
- Views 82
- Downloads 0
Determining Gun Position on the Basis of Entities Characterising an Arc of Projectile Trajectory
A method for determining an enemy gun position is presented, based on examination of an arc of trajectory of a projectile being tracked. Appropriate formulae for identification of a projectile by means of its ballistic c...
Zastosowanie aktywnej termografii podczerwonej z wymuszeniem mikrofalowym do wykrywania min lądowych typu PMN, PMN-2 oraz PMF-1
W pracy przedstawiono wyniki zastosowania aktywnej termografii podczerwonej z wymuszeniem mikrofalowym do wykrywania zakopanych w piasku ćwiczebnych min przeciwpiechotnych: PMN, PMN-2 oraz PMF-1. Wspomniane miny mają obu...
Analysis of Dynamics of Remote-Controlled Artillery-Missile System
The paper presents physical and mathematical model of the modified remote-controlled the artillery-missile system (AMS) system of the Wróbel II type that is intended to be located on a warship. The proposed system is use...
Small Arms Ammunition Ricochet Phenomenon Testing Methods
This article describes selected methods of testing and analyzing small arms ammunition ricochet. Described test method has been used to assay anti-ricochet ammunition in 5,56 mm, 7,62 mm and 9 mm caliber. Doppler radar s...
Specific Features of Ignition of the Solid Rocket Fuel in a Gas Generator with the Use of Pyrogenic Tablets
In the paper the results of measurements of ignition of the gunpowder gas generator with the use of pyrogenic tablets of low gas output were presented. The results of ballistic measurements for the mixtures B/KNO3, Zr/KN...