Collapse Mechanism Analysis of Foam-Filled Corrugated Sandwich Beams under In-Plane Compression

doi:10.7652/xjtuxb201411007

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Collapse Mechanism Analysis of Foam-Filled Corrugated Sandwich Beams under In-Plane Compression

更新时间：2025-07-09

- Collapse Mechanism Analysis of Foam-Filled Corrugated Sandwich Beams under In-Plane Compression
- Vol. 48, Issue 11, Pages: 37-43(2014)
- 作者机构：
  
  1. 西安交通大学轻质结构和材料多学科研究中心,西安,710049
  2. 西安交通大学机械结构强度与振动国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201411007
  CLC： TH117.5
- Online First：10 November 2014，
  
  Published：2014
- 稿件说明：
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Collapse Mechanism Analysis of Foam-Filled Corrugated Sandwich Beams under In-Plane Compression[J]. 2014, 48(11): 37-43.
DOI：

Collapse Mechanism Analysis of Foam-Filled Corrugated Sandwich Beams under In-Plane Compression[J]. 2014, 48(11): 37-43. DOI： 10.7652/xjtuxb201411007.

摘要

为了提高波纹夹芯结构作为高铁车厢或油罐车罐体容器外壳在面内压缩载荷下的结构稳定性

提出了在波纹芯体空隙中填充聚酯泡沫的设想

理论研究了泡沫填充波纹夹芯梁的面内压缩破坏行为

同时对面内压缩破坏进行了数值有限元验证。泡沫填充波纹夹芯梁面内压缩下的主要破坏模式为宏观弹塑性屈曲、面板弹塑性起皱2种模式。结合宏观尺度上芯体的均匀化等效弹性常数

建立宏观屈曲破坏的理论模型; 将泡沫等效为Winkler弹性基

建立面板起皱破坏的理论模型。对304不锈钢波纹夹芯板和Rohacell 51泡沫填充材料

构建结构的破坏模式图

有限元计算结果从破坏模式和临界载荷2个方面验证了理论预测的可靠性。在此基础上

对泡沫填充波纹夹芯结构进行质量最小优化设计

获得结构的最优化几何尺寸。综合考虑承载、能量吸收、减振、隔热等多功能特性

相较于空心波纹夹芯结构和金字塔点阵夹芯结构

泡沫填充波纹复合结构具有潜在的重要工程应用价值。

Abstract

It is proposed to insert polymer foams into the interstices of the corrugated core and the collapse of foam-filled corrugated sandwich beams subject to in-plane compression is investigated analytically and numerically to enhance the in-plane compression structural stability of the corrugated sandwich constructions that will be used as a kind of novel lightweight hulls for high speed strains and oil tanks. Failure mechanisms such as global elastic/plastic buckling and elastic/plastic face wrinkling are taken into account. The equivalent elastic constants of the foam-filled corrugations based upon the homogenization approach are employed to calculate the critical failure load of global buckling

and analytical formulae of face wrinkling are given by treating the foam insertion as Winkler-type elastic foundation. A failure mechanism map is constructed by using the material properties of 304 stainless steel and Rohacell 51 foam

and then three different constructions are designed to numerically probe different failure modes. It is shown that the analytical predictions accurately capture both the critical failure load and the failure mechanism. The minimum weight optimization design to foam-filled corrugated sandwich beams subject to in-plane compression is carried out and compared with competitive structures to obtain the optimal geometrical dimension of structure. Comparisons on considering the features such as load bearing

energy absorption

vibration damping

heat insulation and other multi-functional characteristics show that the foam-filled corrugated sandwich has greater potential in engineering application over empty corrugated and pyramidal sandwiches.

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references

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