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首页> 外文期刊>Journal of Sandwich Structures and Materials >Impact damage testing on composite marine sandwich panels. Part 2: Instrumented drop weight
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Impact damage testing on composite marine sandwich panels. Part 2: Instrumented drop weight

机译：复合船用夹芯板上的冲击损伤测试。第2部分：仪表化的落锤重量

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摘要

Marine grade hybrid sandwich panels are designed in accordance with BS EN ISO 12215-5:2008 using a wet lay-up and cured under vacuum pressure. The high fibre content composite laminate skins use marine grade orthophthalic polyester, POLYLITE? 440-M850, resin and chopped strand mat (CSM)/woven E-glass; the core is DiVINYCELL? H100 closed cell linear polyvinyl chloride (PVC) foam. Impact damage testing followed American Society for Testing and Materials (ASTM) D7766-11 procedure C and ASTM D7I36/D7I36M-05. Impact damage was sustained by the default hemispherical indentor and further 'standard' geometrical indentor rocks - conical, pyramid and cylindrical. The investigation reviews the current state of affairs in impact sandwich testing procedures. A 50-80% through thickness penetration criteria is proposed following noted shortcomings in the standard originally intended for laminates. It is shown that the panel overall flexural rigidity to thickness ratio better describes the transition between 'thin' to 'thick' impact response; force measurements indicate that strain rate effects need to be considered; dent indentation can only be assessed through data acquistion; destructive damage observation sectioned specimen observations describe the impact damage sustained under the various indentor conditions, as well as the roles played by both the face composite skins and the core material.
机译：船用级混合夹心板是根据BS EN ISO 12215-5：2008设计的，采用湿铺层并在真空压力下固化。高纤维含量的复合层压板蒙皮使用船用级邻苯二甲酸聚酯POLYLITE？ 440-M850，树脂和短切毡（CSM）/编织电子玻璃;核心是DiVINYCELL？ H100闭孔线性聚氯乙烯（PVC）泡沫。冲击损伤测试遵循美国材料试验学会（ASTM）D7766-11程序C和ASTM D7I36 / D7I36M-05。默认的半球形压头和进一步的“标准”几何压头岩石（圆锥形，金字塔形和圆柱形）承受了冲击破坏。该调查回顾了冲击三明治测试程序的当前状况。根据最初用于层压板的标准中指出的缺点，提出了50-80％的厚度穿透标准。结果表明，面板的整体抗弯刚度与厚度之比更好地描述了“薄”到“厚”冲击响应之间的过渡。测力表明需要考虑应变率的影响。凹痕压痕只能通过数据获取来评估;破坏性破坏观察分段的样本观察描述了在各种压头条件下承受的冲击破坏，以及面部复合蒙皮和核心材料所起的作用。

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