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Processing conditions and properties of continuous fiber reinforced GF/PP therm...
Nunes, J. P.; Silva, J. F.; Novo, Paulo; Marques, A. T.The aim of the present work was to study and compare the processing conditions and final mechanical properties of continuous glass-fiber reinforced polypropylene composites (GF/PP) manufactured by using available thermoplastic preimpregnated materials produced by different methods.To assess the quality of the three different GF/PP pre-impregnated materials, final manufactured composite parts were submitted to m...
Production of thermoplastic matrix pre-impregnated materials to manufacture com...
Tinoco, V.; Novo, Paulo; Nunes, J. P.; Silva, J. F.; Marques, A. T.The aim of the work was optimizing the continuous production of new continuous carbon fibers reinforced polypropylene matrix pre-impregnated materials (towpregs). This raw-material, produced by dry deposition of polypropylene (PP) powder in an equipment built by the Institute for Polymers and Composites (IPC), was used to manufacture composite pultruded profiles in a recently developed prototype equipment assem...
Comparing the performance of different thermoplastic matrix pre-impregnated mat...
Santos, M. S.; Nunes, J. P.; Silva, J. F.; Novo, Paulo; Marques, A. T.This work studies and compares the processability into final composite parts of three different pre-impregnated materials, produced by different wetting techniques. All studied pre-impregnated materials were based on a continuous glass fibers reinforced polypropylene matrix (GF/PP) system. One is a tape produced in a previous work by using the melting process (cross-head extrusion) and, from the other two produ...
Development of a new pultrusion equipment to manufacture thermoplastic matrix ...
Novo, P. J.; Silva, J. F.; Nunes, J. P.; Hattum, F. W. J. van; Marques, A. T.This paper describes the design and manufacture of a low-cost full scale pultrusion prototype equipment and discusses the production and obtained mechanical properties of polypropylene/glass (GF/PP) reinforced composite ba rs fabricated by using the prototype equipment. Three different GF/PP pre-impregnated ra w-materials, a commercial GF/PP comingled system from Vetrotex, a GF/PP powder coat ed towpreg [1-3] a...
Filament wound products made with thermoplastic matrix towpregs
Silva, J. F.; Nunes, J. P.; Marques, A. T.Cost-effective glass-reinforced thermoplastic matri x towpregs produced by a powder coating line were used to manufacture composite pipes by fi lament winding. A conventional 6 axes filament-winding equipment was adapted for processi ng such structures. The influence of the filament winding speed and mandrel temperature on t he composite final properties was studied in the present work. An optimized processin g...
Processing of continuous fibre reinforced thermoplastics
Nunes, J. P.; Silva, J. F.; Marques, A. T.Towpregs based on different fibres and thermoplastic matrices were processed for highly demanding and more commercial applications by different composite processing technologies. In the technologies used, compression moulding and pultrusion, the final composite pr ocessing parameters were studied in order to obtain composites with adequate properties at industrial compatible production rates. The produced towpr...
Modelação da furação de laminados por elementos finitos
Durão, Luís M.; Gonçalves, Daniel J. S.; Moura, M. F. S. F. de; Marques, A. T.Furação de estruturas em compósitos de matriz polimérica ; O recurso ao Método de Elementos Finitos (MEF) para a simulação e estudo da maquinagem tem vindo a merecer um interesse crescente. Neste trabalho comparam-se os resultados experimentais obtidos usando diferentes brocas helicoidais com uma simulação numérica da furação usando elementos sólidos tridimensionais do software ABAQUS® Explicit. Os resultados ...
Filament wound products made with thermoplastic matrix towpregs
Silva, J. F.; Nunes, J. P.; Marques, A. T.Cost-effective glass-reinforced thermoplastic matrix towpregs produced by a powder coating line that were used to manufacture composite pipes by filament winding. A conventional 6 axes filament-winding equipment was adapted for processing such structures. The influence of the filament winding speed and mandrel temperature on the composite final properties was studied in the present work. An optimized processing...
Processing of continuous fibre reinforced thermoplastics
Nunes, J. P.; Silva, J. F.; Marques, A. T.Towpregs based on different fibres and thermoplastic matrices were processed for highly demanding and more commercial applications by different composite processing technologies. In the technologies used, compression moulding and pultrusion, the final composite processing parameters were studied in order to obtain composites with adequate properties at industrial compatible production rates. The produced towpre...
Development of a new pultrusion equipment to manufacture thermoplastic matrix c...
Novo, Paulo; Silva, J. F.; Nunes, J. P.; Hattum, F. W. J. van; Marques, A. T.This paper describes the design and manufacture of a low-cost full scale pultrusion prototype equipment and discusses the production and obtained mechanical properties of polypropylene/glass (GF/PP)reinforced composite bars fabricated by using the prototype equipment. Three different GF/PP pre-impregnated raw-materials, a commercial GF/PP comingled system from Vetrotex, a GF/PP powder coated towpreg [1-3] and, ...
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