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Experimental and analytical assessment of the hypervelocity impact damage of GLAss fiber REinforced aluminum

Defence Technology（防务技术） 2022年第7期18卷 1232-1246页

作者： Md.Zahid Hasan Bangladesh Air Force Academy Bangladesh Air Force Base Matiur RahmanBAF Academy Road7404 JessoreKhulnaBangladesh

This article addresses the response of GLAss fiber REinforced aluminum to hypervelocity impacts of micrometeoroid analogs at impact velocities of 7 km/s and *** relation,the damage modes of different GLAss fiber REinforced aluminum configurations have been *** GLAss fiber REinforced aluminum configurations comprised six to twelve variably thick aluminum layers and up to four plies of glass fiber reinforced epoxy per composite *** impact experiments have been conducted with the help of a two-stage light-gas gun,wherein aluminum-and stainless steel projectiles were launched at velocities up to 7.15 km/*** inspection of the damage area suggested the dissipation of impact energy in elastic-plastic deformation,petalling,delamination,debonding,tensile failure of fibers,and pyrolysis of epoxy.A prevailing damage mode was not apparent *** quasi-isotropic ply orientation of S2-glass/FM94-epoxy laminates promoted the interference of shockand rarefaction waves and suppressed the damage area of GLAss fiber REinforced *** discriminate between the impact performance of different GLAss fiber REinforced aluminum configurations,the energy dissipated in different damage modes of GLAss fiber REinforced aluminum has been assessed *** terms of normalized energy,the cross-ply GLAss fiber REinforced aluminum dissipated higher energy in petal formation than in other primary damage *** normalized petalling energy was found to decline with the increase of impact *** outcomes of this study will help to optimize the GLAss fiber REinforced aluminum laminate,which will be employed as a bumper shield to prevent the fatal damage and the unzipping of a spacecraft pressure bulkhead.

关键词： Hypervelocity impact Petalling Fiber failure volumetric compression Sublimation of epoxy

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