Publications by Martyn Douglas Wakeman

Consolidation of net-shape random fiber thermoplastic composite preforms

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

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

Hybrid Glass Mat-reinforced Polypropylene-Montmorillonite Nanocomposites

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

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

Flow Properties of Tailored Net-Shape Thermoplastic Composite Preforms

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

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

Integrating life cycle costs and environmental impacts of composite rail car-bodies for a Korean train

Daniel Emery, Martyn Douglas Wakeman, Isabelle Blanc

A coupled Life Cycle Costing and life cycle assessment has been performed for car-bodies of the Korean Tilting Train eXpress (TTX) project using European and Korean databases, with the objective of assessing environmental and cost performance to aid materi ...

Springer-Verlag2009

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

Hybrid glass fiber-reinforced thermoplastic nanocomposites

John Christopher Plummer, Chrystèle Houphouet-Boigny Favre, Martyn Douglas Wakeman

The feasibility of integrating thermoplastic isotactic polypropylene/ montmorillonite nanocomposite matrices into conventional fiber-reinforced composites has been investigated. Two basic processing routes were considered: long glass fiber (GF)-reinforced ...

2008

Optimization of hybrid thermoplastic composite structures using surrogate models and genetic algorithms

Martyn Douglas Wakeman

Using an integrated processing methodology, an injection or compression moulded thermoplastic structure can be locally reinforced, for example, with textile structures or uni-directional fibre tows. Netshape components can be produced with cycle times typi ...

2007

Towards Textile-Based Fiber Reinforced Thermoplastic Nanocomposites: Melt Spun Polypropylene-Montmorillonite Nanocomposite Fibers

John Christopher Plummer, Chrystèle Houphouet-Boigny Favre, Martyn Douglas Wakeman

The present work is aimed at assessing the feasibility of integrating thermoplastic polypropylene nanocomposite matrices into conventional fiber-reinforced composites based on hybrid textiles that incorporate both the matrix and glass-fiber yarns, in order ...

2007

Glass Fiber Reinforced Polypropylene Nanocomposites

John Christopher Plummer, Véronique Michaud, Chrystèle Houphouet-Boigny Favre, Martyn Douglas Wakeman

2007

An investigation of stamp-formed polypropylene based textile composites

Patrick Blanchard, Martyn Douglas Wakeman, Fabio Demarco

2007

Stamp forming of carbon fibre/PA12 composites - a comparison of a reactive impregnation process and a commingled yarn system

Pierre-Etienne Bourban, Martyn Douglas Wakeman

Two forms of carbon fibre reinforced polyamide 12 (PA12) were compared during non-isothermal stamp forming. The first was a stretch broken commingled yarn woven into a fabric, studied at three initial preconsolidation levels. The second was produced by in ...

2006

Manufacturing cost comparison of thermoplastic and thermoset RTM for an automotive floor pan

Véronique Michaud, Martyn Douglas Wakeman

Two resin transfer moulding (RTM) processes have been examined for automotive body-in-white (BIW) structures. An epoxy system was compared with a novel reactive polyamide 12 (PA12) system via characterisation of reaction kinetics and the production of carb ...

2006

Void Evolution During the Stamp-Forming of Thermoplastic Composites Sheets

Patrick Blanchard, Martyn Douglas Wakeman

2006

Coupled cost and life cycle modelling of composite car bodies for the Korean Tilting Train Express Project

Martyn Douglas Wakeman, Isabelle Blanc

2006

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

Véronique Michaud, Martyn Douglas Wakeman, Simon Jespersen

2006

Over-moulding of structural composite inserts – a process, property, and cost comparison of PP and PET-based generic beam structures

Martyn Douglas Wakeman

2006

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

Procede non isothermique de fabrication de parties composites creuses

Martyn Douglas Wakeman, Pascal Vuilliomenet

A process for making hollow composite structures or vessels which includes the steps of: A) heating a mixture of thermoplastic matrix and reinforcing fibres wrapped over a rigid or semi-rigid thermoplastic liner or bladder above the melting point of the th ...

2005

Finite element modelling and testing of an injection moulded generic tow reinforced structure

Martyn Douglas Wakeman

The deformation and fracture behaviour of a generic injection moulded structure reinforced by a robotically placed commingled glass fibre/polypropylene UD-tow (uni-directional) was simulated by finite elements. The suitability of modelling hybrid structure ...

2005

Processing of Hybrid Glass-Fibre Reinforced Thermoplastic Nanocomposites

John Christopher Plummer, Chrystèle Houphouet-Boigny Favre, Martyn Douglas Wakeman

The aim of this work is to integrate polypropylene/montmorillonite (MMT) nanocomposite matrices into conventional fibre-reinforced composites. Two types of composite have been considered: long fibre-reinforced composites from co-woven glass fibre and nanoc ...

2005