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Concept

Préimprégné

Publications associées (26)

Non-autoclave processing of honeycomb sandwich structures: Skin through thickness air permeability during cure

Jan-Anders Edvin Maansson, Véronique Michaud

In non-autoclave processing of sandwich structures, the pressure level inside the honeycomb becomes a critical process parameter, which depends on the permeability to air of the upper skin. In this work, prepreg and adhesive permeabilities were determined ...

Elsevier2010

Hybrid Glass Mat-reinforced Polypropylene-Montmorillonite Nanocomposites

Jan-Anders Edvin Maansson, Véronique Michaud, John Christopher Plummer, Martyn Douglas Wakeman, Sara Dalle Vacche, Chrystèle Houphouet-Boigny Favre

Polypropylene/montmorillonite (iPP/MMT) has been investigated as an alternative to isotactic polypropylene (iPP) as a matrix for glass mat thermoplastic (GMT) composites. The melt viscosity increased significantly on MMT addition, but iPP/5.9wt% MMT-based ...

2010

Assessment of semi-impregnated fabrics in honeycomb sandwich structures

Jan-Anders Edvin Maansson, Véronique Michaud

Semi-impregnated fabrics, or semipregs, are fabrics alternating dry and resin impregnated areas along the fibre bed surface. Due to their increased initial through thickness permeability to gas flow, these could constitute an alternative to prepreg in the ...

2010

The Effect Of Processing Conditions On The Morphology, Mechanical And Electrical Properties Of Batio3-Polymer Composites

Jan-Anders Edvin Maansson, Véronique Michaud, Yves Leterrier, Sara Dalle Vacche

Ferroelectric ceramic – polymer composites have a unique mix of electrical and mechanical properties. Piezoelectric and pyroelectric activity, a wide range of dielectric constants and high breakdown strength are combined with mechanical flexibility, formab ...

2010

Through thickness air permeability of prepregs during cure

Jan-Anders Edvin Maansson, Véronique Michaud

An experimental method based on a falling pressure measurement is proposed to evaluate the through thickness air permeability of prepregs during cure, with two set-up variants. One concerns the measurement of the inherent air permeability and the other app ...

2009

Optimisation of low pressure processing for honeycomb sandwich structures

Vacuum-bag processing of honeycomb sandwich structures faces particular challenges compared to autoclave sandwich fabrication for aeronautics, a consequence of using, at the most, atmospheric pressure for their manufacturing. In particular, the adhesion of ...

EPFL2009