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首页> 外文期刊>Journal of Materials Engineering and Performance >Indentation of Foam-Based Polymer Composite Sandwich Beams and Panels Under Static Loading
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Indentation of Foam-Based Polymer Composite Sandwich Beams and Panels Under Static Loading

机译：泡沫基聚合物复合材料夹芯梁和面板在静载荷下的压痕

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摘要

Foam core composite sandwich structures are highly susceptible to damage when subjected to localized loading. Therefore, thorough study of the role of factors such as face sheet thickness, indentor diameter value, and crosshead displacement rate in indentation events is important. The objective of the present work is to investigate experimentally and numerically the influence of these factors on the nonlinear static indentation behavior of sandwich beams and panels consisting of glass fiber/resin face sheets and PVC (polyvinylchloride) foam core. Static indentation tests are carried out on sandwich composite beam and panel specimens using steel cylindrical and spherical indentors, respectively. Numerical models are developed for simulating the mechanical response of sandwich structures subjected to localized indentation beyond the limit of elastic deformation in the foam core. In this relation, the CRUSHABLE FOAM and the CRUSHABLE FOAM HARDENING options in the ABAQUS finite element program system are used. The numerical analysis results demonstrate good agreement with experimental data. It is found that increasing the face sheet thickness and indentor diameter value leads to increase in the load (for a given displacement). It is shown also that the indentation behavior does not exhibit sensitivity to crosshead displacement rate over the conditions considered in the present work.
机译：泡沫芯复合材料夹层结构在承受局部载荷时极易损坏。因此，深入研究诸如面板厚度，压头直径值和十字头位移率等因素在压痕事件中的作用非常重要。本工作的目的是通过实验和数值研究这些因素对由玻璃纤维/树脂面板和PVC（聚氯乙烯）泡沫芯组成的夹层梁和面板的非线性静态压痕行为的影响。分别使用圆柱形钢和球形压头对夹心复合梁和面板样本进行静态压痕测试。开发了数值模型来模拟夹心结构在局部压痕作用下超出泡沫芯的弹性变形极限的机械响应。在这种关系中，使用了ABAQUS有限元程序系统中的“可破碎泡沫”和“可破碎泡沫硬化”选项。数值分析结果与实验数据吻合良好。发现增加面板厚度和压头直径值会导致载荷增加（对于给定位移）。还表明，在当前工作中考虑的条件下，压痕行为对十字头位移率没有敏感性。

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