Development and Characterization of 3D Nonwoven Composites

2012 ◽  
Vol 714 ◽  
pp. 131-137 ◽  
Author(s):  
Maryline Lewandowski ◽  
Marion Amiot ◽  
Anne Perwuelz
Keyword(s):  
Composite Materials ◽  
Pore Size ◽  
Theoretical Models ◽  
Contact Length ◽  
Porous Composite ◽  
Static Compression ◽  
Average Fibre ◽  
Potential Use ◽  
Quasi Static Compression

The aim of this paper is to present the results of a study showing the potential use of nonwoven textile structures as reinforcement in composite applications. Lightweight 3D porous composite materials have been developed from sandwich nonwovens obtained by combining several nonwoven monolayers manufactured with needlepunching and/or hydroentanglement consolidation treatments. The different structures - nonwovens and composites have been characterized, essentially with a quasi-static compression. Theoretical models have been applied to evaluate the fibre arrangement through the average fibre contact length or equivalent pore size inside the material. A difference in behaviour in compression has been observed for the different structures, and has been explained in terms of the different fibre arrangement inside the nonwoven structure which is related to the process.

scholarly journals Prediction of Crushing Response for Metal Hexagonal Honeycomb under Quasi-Static Loading

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Xinyu Geng ◽  
Yufei Liu ◽  
Wei Zheng ◽  
Yongbin Wang ◽  
Meng Li
Keyword(s):  
Mathematical Models ◽  
Static Loading ◽  
Theoretical Basis ◽  
Theoretical Models ◽  
Excellent Correlation ◽  
Static Compression ◽  
Out Of Plane ◽  
Plane Direction ◽  
Element Theory ◽  
Quasi Static Compression

To provide a theoretical basis for metal honeycombs used for buffering and crashworthy structures, this study investigated the out-of-plane crushing of metal hexagonal honeycombs with various cell specifications. The mathematical models of mean crushing stress and peak crushing stress for metal hexagonal honeycombs were predicted on the basis of simplified super element theory. The experimental study was carried out to check the accuracy of mathematical models and verify the effectiveness of the proposed approach. The presented theoretical models were compared with the results obtained from experiments on nine types of honeycombs under quasi-static compression loading in the out-of-plane direction. Excellent correlation has been observed between the theoretical and experimental results.

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