DAMAGE CHARACTERISTIC OF MEMBRANE UNDER IMPACT LOADING

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Publication year 2001
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Title DAMAGE CHARACTERISTIC OF MEMBRANE UNDER IMPACT LOADING
Author Kinya Ogawa,Fumiko Sugiyama
Summary In this paperĀEĆperforation of polymer membrane under impact load has been focused. Uni-axial tensile tests were carried out to confirm the strain rate effect on the stress-strain relations. It is found that the stress increases with rise of strain rateĀEĆwhile the fracture strain significantly decreases. Two kinds of indenterĀEĆsemi-spherical and circular coneĀEĆwere used for the perforation experimentĀEĆand load-deflection relations were identified in the wide range of loading rate. Perforation under impact load proceeded at much smaller deflection than the case of static loadingĀEĆand large plastic deformation was not associated in the adjacent region of penetration. Dynamic finite element analysis (FEM) was performed to clarify the characteristics of the present experiment as well as to predict the load-deflection relations. It is convinced that dynamic perforation behavior mainly depends on the constitutive equation of membrane material at high strain rateĀEĆwhile the inertia effect does not play a predominant role in the circumstances employed here.