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Perforation resistance of sandwich panels with layered gradient metallic foam cores

机译：具有分层梯度金属泡沫芯的夹芯板的抗穿孔性

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摘要

The perforation resistance capability of clamped square sandwich panels with layered gradient metallic foam cores subjected to the hemispherical-nosed projectile impact was investigated numerically. The previous penetration tests on monolithic foam core sandwich panels were used to validate the present simulation approach, and then the deformation process, critical velocity and energy absorption of monolithic Al plate, ungraded and layered-gradient sandwich targets were studied, respectively. Influences of the strain rate and asymmetric face-sheets on the perforation resistance of the layered-gradient sandwich target were also discussed. The simulation results indicate that layered-gradient sandwich targets have the worst perforation resistance and energy absorption capability, and then the ungraded sandwich panel, and the monolithic plate is the best. For layered-gradient sandwich panels, the perforation resistance is hard to improve obviously by changing the arrangements of core-layers. Besides, the strain rate effect of materials and asymmetric face-sheets contribute to enhance the perforation resistance of layered-gradient sandwich targets only for the low-velocity penetration condition. These findings are beneficial for guiding the design and assessment of layered-gradient sandwich structures in engineering applications. (C) 2017 Elsevier Ltd. All rights reserved.
机译：数值研究了夹层方形泡沫夹层夹心方形夹芯板在半球形鼻弹丸冲击下的抗穿孔能力。利用以前在整体泡沫芯夹心板上进行的渗透试验来验证该模拟方法，然后分别研究了整体Al板的变形过程，临界速度和能量吸收，非梯度和分层梯度夹心靶。还讨论了应变率和不对称面板对分层梯度夹层靶的抗穿孔性的影响。仿真结果表明，分层梯度夹心靶的抗穿孔性能和能量吸收能力最差，其次是不梯度夹心板，整体板最好。对于层状渐变夹心板，通过改变芯层的排列很难明显提高抗穿孔性能。此外，材料和非对称面板的应变率效应仅在低速穿透条件下有助于增强分层梯度夹层靶的抗穿孔性。这些发现对于指导工程应用中分层梯度夹层结构的设计和评估是有益的。 （C）2017 Elsevier Ltd.保留所有权利。

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  • 来源
    《Composite Structures》 |2017年第7期|217-226|共10页
  • 作者

    Jing Lin; Yang Fei; Zhao Longmao;

  • 作者单位

    Southwest Jiaotong Univ, State Key Lab Tract Power, Chengdu 610031, Peoples R China|Xi An Jiao Tong Univ, State Key Lab Strength & Vibrat Mech Struct, Xian 710049, Peoples R China;

    Guangdong Univ Technol, Sch Civil & Transportat Engn, Guangzhou 510006, Guangdong, Peoples R China;

    Taiyuan Univ Technol, Inst Appl Mech & Biomed Engn, Taiyuan 030024, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Gradient foams; Sandwich panel; Perforation resistance; Strain rate; FE simulation;

    机译：梯度泡沫;夹心板;抗穿孔;应变率;有限元模拟;

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