JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 85

USERS’ PLATFORM

Focus
Windform® FX is a new generation of polyamide-based material with mechanical and repeatable characteristics that are particularly suited to rapid manufacturing applications. White in colour, Windform® FX is characterized by exceptional resistance and resilience to repeated bending and torsion stresses; excellent crash resistance; and consistence and behaviour similar to polypropylene and ABS stamped parts. made it a valid alternative to the XT insert, capable of better withstanding the required dynamic and static loads. A further step forward in the project consisted in updating and implementing the mathematics of the clip to be developed. Prince Sports elongated and extended the insert along the entire racquet perimeter. The design was upgraded and, structure-wise, the experience of the first prototypes was exploited to increase the part’s durability. After studying the updated file and duly verifying feasibility, including from a dimensional viewpoint, the RP department went ahead with the production of the FX clips. This second solution for the production of the surround inserts

achieved the success that had been hoped for. In the customer’s opinion too, the samples appeared surprisingly flexible and strong.

presented in America.

To the final product
Once the model was completed and its three main parts assembled, the racquet underwent CRP’s usual smoothing process and was then sent to the customer for final varnishing. The entire frame underwent a postmachining surface treatment to polish up the racquet surface and prepare it for varnishing, so that no imperfections would show.

Design application
Fitting the tested Windform FX inserts inside the complete racquet model (an end result of Prince R&D activities for the new season) was the next step. Here, rather than functional testing, the aim was of a substantially aesthetic and design nature, to which Windform materials adapt well. The parts making up the scale 1:1 model, which were produced by CRP Technology, are the frame structure, the relevant inserts or clips surrounding the perimeter of the racquet (the only ones to be also functionally tested), and a bumper positioned on the racquet head and designed to receive impacts. The choice of material for the frame took into account two main parameters: 1) the Clip and final racket dimensions of the structure in relation to the sintering volume of the RP machine (max. 330 x 380 x 420 mm) – due to the size of the frame, it was necessary to glue several parts together using a special structural epoxy resin; and 2) the ultimate purpose of the prototype and the ultimate loads it had to withstand. For these two reasons, the choice fell on Windform® GF material, a composite material with added aluminium and glass. The decision to use different materials for the racquet structure and for the bumper and inserts proved to be a winning one. The bumper was made from Windform® FX, just like the previously created and tested inserts that were fitted to the final model

From a technical viewpoint, the tension of the strings forces the inserts to withstand a considerable concentrated static load. The grommets, on which the strings are wound, were subjected to a uniformly distributed load of around 30 kg, while in the case of the production samples, the static tension on the support bridges reaches 70 kg and further increases in dynamic regime (during impact with the ball). However, the prototype was not dynamically tested. For this reason, the final racquets are made in laminated carbon. This racquet will be entirely made of carbon fibre and will weigh 240 g (finished with varnishing, plastic parts, strings, etc.). The weight of the raw frame is expected to be around 180 g, even though the accessory parts make it heavier. More information: www.crptechnology.com

Frame and details

No56 April 2010 / jec composites magazine

85


http://www.crptechnology.com

JEC COMPOSITES MAGAZINE - Issue #56 - April 2010

Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #56 - April 2010

Cover
Editorial
Market Place
Advertisers
Index
Contents
NEWS WORLDWIDE
Companies
- A pole of reference for the development of technical flax
- Inauguration of the Duqueine Site - Airbus A350 XWB
- ABMACO and IPT start a composite recycling programme
- Bayer MaterialScience opens world's largest carbon nanotube pilot facility
- Premium Aerotec in Augsburg receives autoclave for fuselage structure of A350 XWB
Agenda of events
BUSINESS
Market survey
- Carbon fibre worldwide market
- Carbon fibres at JEC Show Paris 2010
Human capital
- EHS manager : a professional’s point of view
FEATURE SPECIAL JEC SHOW 2010
Guest of Honor
- JEC Composites Show Paris 2010 : Richard Morrison Guest of Honor
End-users conferences & forums
JEC Innovation Awards Programme 2010
Country Guest of Honor : Italy
- The composite material industry in Italy : achievements and perspectives
- Innovative bio-based composites for automotive applications
- On board with CMS Industries : BMW Oracle Racing wins the 33rd America’s Cup
- Lamellar filament winding
Pavilion USA
- Overview of the US pavilion
- Applying automation to the fabrication of composite-based aerospace parts
Feature Automation
- Main trends at JEC Composites Show Paris 2010
- Glass-filament twisting
- Laser-assisted thermoplastic tape lying
- Continuous impregnation of carbon-fibre rovings
USERS’ PLATFORM
Composites in the world
- French pavilion at the Shanghai World Expo 2010
- Chariot skates
- The Peugeot SR1 concept
Successful partners
- Intelligent composite “seismic wallpaper”
Application
- A balsa-cored bridge deck installed in Louisiana
- A scale 1 : 1 tennis racquet model
KNOW-HOW
Simulation
- Mastering simulation methods and tools for composite design
CNT
- Practical use of Graphistrenght® CNT concentrates in composites
- Moving towards industrial-scale high-tech applications
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - Cover
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 2
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - Editorial
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - Market Place
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - Index
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - Contents
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 7
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - NEWS WORLDWIDE
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - A pole of reference for the development of technical flax
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - Premium Aerotec in Augsburg receives autoclave for fuselage structure of A350 XWB
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 11
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - Agenda of events
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 13
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 14
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - BUSINESS
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - Carbon fibre worldwide market
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 17
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - Carbon fibres at JEC Show Paris 2010
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 19
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 20
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 21
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - EHS manager : a professional’s point of view
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - FEATURE SPECIAL JEC SHOW 2010
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - JEC Composites Show Paris 2010 : Richard Morrison Guest of Honor
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 25
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - End-users conferences & forums
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 27
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 28
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 29
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 30
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - JEC Innovation Awards Programme 2010
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 32
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 33
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 34
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 35
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 36
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 37
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 38
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 39
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 40
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 41
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 42
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 43
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - The composite material industry in Italy : achievements and perspectives
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 45
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 46
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 47
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 48
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - Innovative bio-based composites for automotive applications
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 50
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - On board with CMS Industries : BMW Oracle Racing wins the 33rd America’s Cup
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 52
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - Lamellar filament winding
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - Overview of the US pavilion
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 55
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 56
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 57
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - Applying automation to the fabrication of composite-based aerospace parts
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 59
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 60
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 61
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 62
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - Main trends at JEC Composites Show Paris 2010
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 64
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 65
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 66
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 67
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - Glass-filament twisting
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 69
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 70
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - Laser-assisted thermoplastic tape lying
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 72
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 73
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 74
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - Continuous impregnation of carbon-fibre rovings
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 76
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - USERS’ PLATFORM
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - The Peugeot SR1 concept
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - Intelligent composite “seismic wallpaper”
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 80
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 81
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - A balsa-cored bridge deck installed in Louisiana
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 83
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - A scale 1 : 1 tennis racquet model
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 85
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 86
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - KNOW-HOW
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 88
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - Mastering simulation methods and tools for composite design
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 90
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 91
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 92
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - Practical use of Graphistrenght® CNT concentrates in composites
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 94
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 95
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - - Moving towards industrial-scale high-tech applications
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 97
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 98
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 99
JEC COMPOSITES MAGAZINE - Issue #56 - April 2010 - 100
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