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OFF-LINE QUALITY CONTROL IN FILAMENT WENDING DESIGN AND PRODUCTION ENGINEERING

Obiettivo


Two main results are available from the project:

FWORM (Software code)

FWORM was developed to be the media to use and represent the empirical model relationships in a very easy and direct way, specially for those familiarised with FW process. The user will be able to evaluate approximately the value of several QCs just using the mouse to vary the values of parameters or to obtain those parameter values that optimises several QCs simultaneously. Moreover, FWORM Edition module lets the user to implement his own models.

The software predicts fibre volume fraction, composite void content, apparent interlaminar shear strength (ILSS), Glass transition temperature, Compression shear strength, Acoustic emission in compression, and circunferential residual strain. Models to define predicted tow width and tow resin load in the impregnation drum are also available. Predictions are based on process parameters levels and considers different raw material characteristics. Models are based on most common types of glass and carbon fibres and epoxi resin systems. The resulting code can operate on a PC and has been implemented in 16 bits and 32 bits versions.

The software code will serve as a basis for improvement quality and reliability of the product, enabling to find new high quality applications in critical components.

Test methods for evaluating equipment quality and final product characteristics have also been developed during the project. Main deliverables are the following:

- Impregnated tow quality characteristics in situ monitoring: Method for measuring resin take up in the impregnation drum, tow width obtained, aspect ratio and fuzz (broken filaments) created in the delivery system has been developed. The procedures will help filament winding equipment manufacturers and processors to define equipment quality and reception checks for both raw materials and equipments.
- Compression shear test: A new test method and corresponding equipment has been developed in the project to define accurately the interlaminar shear strength by a compression test. The method is more sensitive to product quality than standard ILSS method and is less sensitive to the sample basic geometry.
- Acoustic emission analysis for composite rings in compression has been developed, with a novel analysis method.
The aim of this project is to establish the basis for the off-line quality control in the design and production engineering of filament wounds parts.

Recently, some attempts have taken place for the integration of this process in a CIM environment and developing tools for an on-line quality control. However, small and medium size companies (SMSCs) which are using this technology have enormous risk and cost problems for developing new products due to the large number of parameters involved in filament winding process. From their point of view, as well as the above, a high effort is required to establish an optimum functional and process design (off-line QC). This project has been considered as an inter-disciplinal attempt to avoid trial and error during the development and setting up of a new filament wound part.

The Project will be developed in five pahses :

1. Filament Winding Parameters Influence Classification.
2. Statistical Analysis "Taguchi Methods" of Parameters Influence.
3. Statistical Analysis of Experimental Results.
4. Parameter Design Model Development.
5. Prototypes Model Validation.

Once these influences have been studied the basic inputs for a CAE philosophy will be achieved, and the overall advanced design technique will contribute both to reduce costs and to improve quality of filament wound parts.

Invito a presentare proposte

Data not available

Meccanismo di finanziamento

CSC - Cost-sharing contracts

Coordinatore

EN SANTA BARBARA I+D
Contributo UE
Nessun dato
Indirizzo
C/JULIAN CAMARILLO 32
28037 MADRID
Spagna

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Costo totale
Nessun dato

Partecipanti (7)