4.7 Article

Temperature, strain rate and anisotropy effects on compressive response of natural and synthetic cellular core materials

期刊

COMPOSITE STRUCTURES
卷 260, 期 -, 页码 -

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2020.113268

关键词

Agglomerated cork; PVC foam; Split Hopkinson pressure bar; Dynamic compression; Strain rate; Temperature

向作者/读者索取更多资源

The study compared the compressive behavior of synthetic foam and environmentally friendly agglomerated cork under different conditions, revealing the remarkable strain rate sensitivity and increased compressive properties with higher strain rate for both materials. Additionally, a decrease in absorbed energy percentage due to embrittlement effect at lower temperatures was observed. Despite noticeable anisotropy, agglomerated cork is confirmed as a sustainable alternative to petroleum-based core materials with higher dimensional stability for sandwich structures.
The remarkable flexural properties of sandwich structures hinge on the selection of performing core materials with suitable out of plane mechanical properties, i.e. compressive ones. For this reason, this work compares the compressive behaviour of a synthetic foam (polyvinyl chloride) and an environmentally friendly agglomerated cork as a function of density, strain rate, temperature and anisotropy. The strain rate sensitivity of these cellular materials was investigated in a wide range of velocity conditions by using drop weight tower and Split Hopkinson Pressure Bar dynamic compression tests. The results highlighted a remarkable strain rate sensitivity of both materials because of their viscoelastic nature and, in particular, an increase in compressive properties with increasing strain rate. This increment was more pronounced in the medium-high strain rate range than in the low-medium one. An embrittlement effect with decreasing temperature was detected, which compromises core materials crashworthiness determining a reduction of the percentage absorbed energy. Despite a remarkable anisotropy induced by the production processes, this work confirms the feasibility of agglomerated cork as a sustainable alternative to petroleum-based cellular core materials especially in consideration of the significant recovery capabilities that ensure a higher dimensional stability of the sandwich structure.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据