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首页> 外文期刊>Composite Structures >Experimental and finite element analysis of the impact response of agglomerated cork and its intraply hybrid flax/basalt sandwich structures
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Experimental and finite element analysis of the impact response of agglomerated cork and its intraply hybrid flax/basalt sandwich structures

机译：凝聚软木凝聚响应的实验和有限元分析及其专内杂交亚麻/玄武岩夹层结构

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摘要

Sandwich structures are widespread in all the industrial applications where a high stiffness-to-weight ratio is required. Despite the unique bending performance, they feature two major drawbacks: the massive exploitation of synthetic materials and a strong susceptibility to impact damage. This work addresses both problems, investigating the puncture impact response of bio-based sandwich structures with an agglomerated cork core and intraply flax/basalt hybrid skins. A preliminary campaign of impacts was performed on three agglomerated corks with different densities and on three traditional polyvinyl(chloride) foams with comparable densities. Based upon the results obtained, one agglomerated cork (NL25) and one PVC foam (HP130) were selected to realize a finite element analysis (FEA) on the sole core and to produce the whole sandwich composites. FEA results show a good agreement with experimental ones ensuring a reliable prediction of cores dynamic response. The tests performed on sandwich structures proved the feasibility of agglomerated cork as an effective core, able to provide an improved damage tolerance to the structure. NL25 sandwiches impacted at 20-30 J showed a permanent indentation 60-67% lower than HP130 ones. The coupling agent in skins has a detrimental effect reducing composites perforation threshold from 80 to 60 J.
机译：夹层结构在需要高刚度至重量比的所有工业应用中都是广泛的。尽管有独特的弯曲性能，但它们具有两个主要缺点：宽大的合成材料开采和强烈易感损坏。这项工作解决了两种问题，研究了生物基夹心结构的穿刺冲击响应与凝聚的软木塞核心和口亚麻/玄武岩杂种皮肤。在三个具有不同密度和三种传统聚乙烯（氯化物）泡沫的三个凝聚的软木塞上进行了初步的影响运动，具有可比密度。基于所得结果，选择一种凝聚的软木（NL25）和一个PVC泡沫（HP130）来实现鞋底核心的有限元分析（FEA）并产生整个夹心复合材料。 FEA结果与实验结果表明，确保可靠地预测核心动态响应。在夹层结构上进行的测试证明了凝聚的软木塞作为有效核心的可行性，能够为结构提供改善的损害耐受性。在20-30次受到影响的NL25三明治显示了永久性压痕，低于HP130的永久性缩进。皮肤中的偶联剂具有减少从80至60 J的复合材料穿孔阈值的有害效果。

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  • 来源
    《Composite Structures》 |2021年第9期|114210.1-114210.15|共15页
  • 作者

    Sergi Claudia; Boria Simonetta; Sarasini Fabrizio; Russo Pietro; Vitiello Libera; Barbero Enrique; Sanchez-Saez Sonia; Tirillo Jacopo;

  • 作者单位

    Sapienza Univ Roma Dept Chem Engn Mat Environm Via Eudossiana 18 I-00184 Rome Italy|UdR INSTM Via Eudossiana 18 I-00184 Rome Italy|Univ Carlos III Madrid Dept Continuum Mech & Struct Anal Madrid Spain;

    Univ Camerino Sch Sci & Technol Camerino Italy;

    Sapienza Univ Roma Dept Chem Engn Mat Environm Via Eudossiana 18 I-00184 Rome Italy|UdR INSTM Via Eudossiana 18 I-00184 Rome Italy;

    CNR Inst Polymers Composites & Biomat Pozzuoli NA Italy;

    Univ Naples Federico II Dept Chem Mat & Prod Engn Naples Italy;

    Univ Carlos III Madrid Dept Continuum Mech & Struct Anal Madrid Spain;

    Univ Carlos III Madrid Dept Continuum Mech & Struct Anal Madrid Spain;

    Sapienza Univ Roma Dept Chem Engn Mat Environm Via Eudossiana 18 I-00184 Rome Italy|UdR INSTM Via Eudossiana 18 I-00184 Rome Italy;

  • 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

    Agglomerated cork; PVC foam; Hybrid composite; Impact Test; Finite element analysis;

    机译：凝聚的软木塞;PVC泡沫;杂交复合材料;冲击试验;有限元分析;

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