Publications de Simon Jespersen

Consolidation of net-shape random fiber thermoplastic composite preforms

Véronique Michaud, Patrick Blanchard, Simon Jespersen, Martyn Douglas Wakeman

A novel thermoplastic composite preforming process has been developed. This thermoplastic programmable powdered preforming process (TP-P4) uses commingled glass and polypropylene yarns, which are chopped to a desired length and deposited onto a vacuum scre ...

2010

Flow Properties of Tailored Net-Shape Thermoplastic Composite Preforms

Véronique Michaud, Patrick Blanchard, Simon Jespersen, Martyn Douglas Wakeman

A novel thermoplastic programmable preforming process, TP-P4, has been used to manufacture preforms for non-isothermal compression molding. Commingled glass and polypropylene yarns are deposited by robot onto a vacuum screen, followed by a heat-setting ope ...

Springer Netherlands2009

Rapid processing of net-shape thermoplastic planar random composite preforms

Véronique Michaud, Patrick Blanchard, Simon Jespersen, Daniel Schmäh

A novel thermoplastic composite preforming and moulding process is investigated to target cost issues in textile composite processing associated with trim waste, and the limited mechanical properties of current bulk flow- moulding composites. The thermopla ...

Springer Netherlands2009

Methodology for evaluating new high volume composite manufacturing technologies

Simon Jespersen

Composite materials are increasingly used in high volume automotive applications, usually as a replacement for assemblies of multiple metallic parts such as stamped and spot-welded steel sheets. One of the motivations is to reduce tooling and assembly cost ...

EPFL2008

Film stacking impregnation model for a novel net-shape thermoplastic composite preforming process

Véronique Michaud, Martyn Douglas Wakeman, Simon Jespersen

An impregnation model has been developed to evaluate the infiltration phenomena that occur during a novel near net shape preforming method. This process comprises automated deposition of thermoplastic resin and unidirectional (UD) carbon fibres to a pre-pr ...

2008

Netshape preforming technologies for thermoplastic composites: a study of the interaction of investment, material cost, trim fractions, and part cost

Martyn Douglas Wakeman, Simon Jespersen

2006

Film stacking impregnation model for thermoplastic composites applied to a novel netshape preforming process

Véronique Michaud, Martyn Douglas Wakeman, Simon Jespersen

2006