Open AccessA comparative experimental study for dry and wet collisions
Author(s) -
Florina-Carmen Ciornei,
Stelian Alaci,
P. Bulai,
Ionut-Cristian Romanu
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1169/1/012020
Subject(s) - coefficient of restitution , collision , dry friction , materials science , impact energy , ball (mathematics) , composite material , polyurethane , impact , mechanics , structural engineering , engineering , physics , mathematics , mathematical analysis , computer security , computer science
The collision between polyurethane prismatic foam and a dropping steel ball is investigated experimentally. Because the foam presents large deformations, an analytical model is not available. The impact is studied on a test rig from laboratory, for dry foam and for the mineral oil wetted foam. The post impact velocity is found measuring the flight time and the coefficient of restitution and lost energy are estimated. For the dry impact case the damping effect is smaller than for the case of oil-wetted target.