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Damage mechanics and energy absorption capabilities of natural fiber reinforced elastomeric based bio composite for sacrificial structural applications

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Defence Technology（防务技术） 2021年第1期17卷 161-176页

作者： Vishwas Mahesh Sharnappa Joladarashi Satyabodh M.Kulkarni Department of Mechanical Engineering National Institute of Technology Karnataka SurathkalMangalore575025India

The present study deals with the experimental,finite element(FE)and analytical assessment of low ballistic impact response of proposed flexible‘green’composite make use of naturally available jute and rubber as the constituents of the composite with stacking sequences namely jute/rubber/jute(JRJ),jute/rubber/rubber/jute(JRRJ)and jute/rubber/jute/rubber/jute(JRJRJ).Ballistic impact tests were carried out by firing a conical projectile using a gas gun apparatus at lower range of ballistic impact *** ballistic impact response of the proposed flexible composites are assesses based on energy absorption and damage *** revealed that inclusion of natural rubber aids in better energy absorption and mitigating the failure of the proposed *** the three different stacking sequences of flexible composites considered,JRJRJ provides better ballistic performance compared to its *** damage study reveals that the main mechanism of failure involved in flexible composites is matrix tearing as opposed to matrix cracking in stiff composites indicating that the proposed flexible composites are free from catastrophic *** obtained from experimental,FE and analytical approach pertaining to energy absorption and damage mechanism agree well with each *** proposed flexible composites due to their exhibited energy absorption capabilities and damage mechanism are best suited as claddings for structural application subjected to impact with an aim of protecting the main structural component from being failed catastrophically.

关键词： Flexible composite Ballistic impact energy absorbed Rubber Damage mechanism

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