LOW VELOCITY IMPACT ANALYSIS ON COMPOSITE MATERIAL
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Abstract
This project aims at experimentally studying low velocity impact on fiber reinforced glass sheets.
An experimental setupis fabricated, wherein a dart of known mass with accelerometer inbuilt in it made to
fall on specimens of fiber reinforced glasssheets.The damageof thesheets of various thicknesses for various
kinetic energies ofdart is studied.The kinetic energy isvaried by altering the height of the dart above the
specimen sheet. The amount of energy transferred from the dart to the sheet ismeasured by the
accelerometer output. The kinetic energy of the dart just before the moment it strikes the sheet is calculated
bysimple formula. The energyabsorbed by thesheetis proportional to the thickness,material characteristics
and the kineticenergy of the dart during collision. The dart is made fall free on the sheet; therefore, the
acceleration is constant and is equal tothe acceleration due to gravity constant (9.8 m sec-2). Since the
height of the dart above the sheet does not exceed three meters,the velocity during collision is
comparatively low. A tabulation of velocities of dart, thickness of sheets and obtained. Theaccelerometer’s
electrical output is signal conditioned and is displayed in a computed using appropriate software. The goal
ofthis project is to get a complete knowledge of the low velocity impact on the glass reinforced fiber sheets
and to conclude howfeasibleitcanbeforvariousapplications.
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