Jeannin Thomas

Jeannin Thomas
Institut FEMTO-ST | FEMTO ST · Department of Applied Mechanics

About

13
Publications
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116
Citations

Publications

Publications (13)
Article
Full-text available
The stinging nettle Urtica dioica L. is a perennial crop with low fertilizer and pesticide requirements, well adapted to a wide range of environmental conditions. It has been successfully grown in most European climatic zones while also promoting local flora and fauna diversity. The cultivation of nettle could help meet the strong increase in deman...
Article
The development of sustainable sandwich materials is needed in the transportation sector to address environmental concerns related to the production and operation of vehicles. In addition to biobased composite skins, alternatives to classic synthetic core materials must be found to reduce the ecological footprint of whole sandwich-structured compos...
Article
Vibro-impact (VI) based control strategies exploit non-linear phenomena occurring during impacts between oscillating masses and vibrating structures to mitigate vibrations. They are known to be effective on a wide frequency range, in harsh environnement, and they are eco-friendly in comparison to some visco-elastic polymers used for the same applic...
Article
This work describes the physical and mechanical characterisation of unidirectional [0]12 and crossply [(0/90)3/0 " ]S flax fibre reinforced composites fabricated in autoclave using a prepreg flax tape impregnated with fire retardant epoxy polymer. Tensile, bending and impact properties are evaluated along the longitudinal and transverse fibre direc...
Article
Acoustic emission (AE) is a passive monitoring technique used for learning about the behaviour of an engineered system. The streaming obtained by continuously recording AE transient signals is treated by a four steps procedure: 1) The detection of salient AE signals by distinguishing noise against non-noise signals using wavelet denoising, 2) the s...
Article
This work assesses the potential of nettle (Urtica dioica L.) fibers produced on contaminated lands for composite applications. The nettles studied in this work grew spontaneously and in a prevalent manner in poplar short rotation coppice planted for the phytomanagement of a land contaminated by traces of metals. Results show that the contaminant c...
Article
This work assesses the potential of stinging nettle (Urtica dioica L.) growing on trace element contaminated soils to produce fibres for material applications. The nettles studied in this work grew spontaneously and dominated the vegetation cover in poplar short rotation coppices planted for the phytomanagement of lands contaminated by trace elemen...
Article
Full-text available
Although the research and development in plant fibre composites is growing rapidly, these materials still require specific considerations before being adopted by industry in structural applications. One of the main issue is related to their durability. The objective of this study is to investigate the influence of hydrothermal ageing on the fatigue...
Article
Full-text available
Even if the knowledge on the fatigue behaviour of plant fibre composites has increased steadily in the last few years, some issues still remain open at the present time. Such is the case, for instance, of the high-cycle fatigue strength. Actually, most of the fatigue studies available in the open literature to date are limited to a maximum of 1–2 m...
Thesis
Ces travaux de thèse proposent une analyse tribologique de l’opération de découpage sur presse. Une meilleure connaissance des mécanismes d’usure présents sur les poinçons de découpage est nécessaire pour permettre leur reproduction en laboratoire et ainsi tester de nouveaux matériaux d’outils, pour allonger leur durée de vie et augmenter la produc...
Conference Paper
Sheet metal blanking process is one of the most employed forming processes in industry. Its reliability and capability of mass production are used to produce a large parts number. As in every forming process, tool wear is of major concern in terms of part quality and economical impact (maintenance costs, tool life time, production down time, …). Co...

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