In this study, flexural characteristics of low-density polyvinylchloride foam core sandwich structures consist of carbon fibre/epoxy facings hybridised with very thin stainless-steel wire mesh sheets were investigated. A comprehensive work was conducted considering the following design parameters: core thicknesses, wire mesh sizes, stacking sequences of wire mesh sheets and support span lengths for flexural tests. During the evaluation of flexural characteristics, experimental ASTM standards (C393, D3039, D7249 and D7250) were utilised. In addition, experimental flexural stiffness values were compared to analytically obtained results. By hybridisation of carbon fibre/epoxy facings with wire mesh sheets, significant improvements in flexural characteristics of sandwich structures were obtained. Besides improving bending behaviour and the larger amount of load-carrying capacity even at the same deflection values, the sandwiches with wire mesh sheets also prevented catastrophic sudden failure, which is the common case for carbon/epoxy/polymer foam core sandwiches. Response surface methodology was applied to evaluate the effects of the design variables on the load capacity of the sandwiches, and optimal solutions were revealed. The developed sandwiches can be good candidates in applications where both high stiffness-to-weight ratio and resistance to sudden failure are desired.

中文翻译：

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不锈钢丝网嵌入纤维增强聚合物饰面对夹层结构弯曲特性的影响

在这项研究中，研究了由碳纤维/环氧树脂饰面与非常薄的不锈钢丝网片混合而成的低密度聚氯乙烯泡沫芯夹层结构的弯曲特性。考虑以下设计参数进行了全面的工作：芯材厚度、丝网尺寸、丝网片的堆叠顺序和用于弯曲测试的支撑跨度长度。在弯曲特性的评估过程中，使用了实验性 ASTM 标准（C393、D3039、D7249 和 D7250）。此外，实验弯曲刚度值与分析获得的结果进行了比较。通过将碳纤维/环氧树脂饰面与金属丝网片混合，夹层结构的弯曲特性得到显着改善。除了即使在相同的挠度值下也能改善弯曲行为和更大的承载能力，带有金属丝网片的夹层还可以防止灾难性的突然失效，这是碳/环氧树脂/聚合物泡沫芯夹层的常见情况。应用响应面方法来评估设计变量对三明治承载能力的影响，并揭示了最佳解决方案。在需要高刚度重量比和抗突然破坏性的应用中，开发的三明治是很好的候选者。应用响应面方法来评估设计变量对三明治承载能力的影响，并揭示了最佳解决方案。在需要高刚度重量比和抗突然破坏性的应用中，开发的三明治是很好的选择。应用响应面方法来评估设计变量对三明治承载能力的影响，并揭示了最佳解决方案。在需要高刚度重量比和抗突然破坏性的应用中，开发的三明治是很好的候选者。