CAJ | 학술논문

利用大型非线性有限元程序ABAQUS和LS-DYNA,对具有填充材料的金属格栅结构的冲击问题进行数值模拟.研究了不同的填充材料(金属泡沫和陶瓷)分别填充到不同的格栅构型(波纹型、蜂窝型和加强六边形)夹层板后,各类夹层板受到金属泡沫子弹和不锈钢子弹冲击时变形与能量吸收特性,探讨了夹层板上下面层板、支撑格栅及填充材料等各部分的吸能比率.研究结果表明,泡沫填充夹层板在缓冲吸能方面具有优势,陶瓷填充夹层板则在抵抗冲击穿透方面更具有优势,不同构型的夹层板,性能略有不同.
이용대형비선성유한원정서ABAQUS화LS-DYNA,대구유전충재료적금속격책결구적충격문제진행수치모의.연구료불동적전충재료(금속포말화도자)분별전충도불동적격책구형(파문형、봉와형화가강륙변형)협층판후,각류협층판수도금속포말자탄화불수강자탄충격시변형여능량흡수특성,탐토료협층판상하면층판、지탱격책급전충재료등각부분적흡능비솔.연구결과표명,포말전충협층판재완충흡능방면구유우세,도자전충협층판칙재저항충격천투방면경구유우세,불동구형적협층판,성능략유불동.
The finite element codes ABAQUS and LSDYNA are employed to analyze the clamped sandwich plates with lattice and filling subjected to impact loading. Three styles of sandwich plates are investigated, ie., corrugated plate, honeycomb plate and kagome plate, each of which is filled with metal foam or ceramic. The numerical simulations involving these sandwich plates subjected to shock of metal foam or rigid projectile, are carried out, and some dynamic mechanical properties, such as deflection and energy absorption, are discussed, and the energy absorption capabilities of different sandwich plates are focused. The results indicate that sandwich plate filled with metal foam is an excellent sandwich structure with strongest energy absorption capability undergoing metal foam projectiles; the sandwich plates filled with ceramic have a higher shock resistance than sandwich plates filled with metal foam under penetration impact of rigid bullet.