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Rheological and electrical analysis in carbon nanofibre reinforced polypropylen...
Lanceros-Méndez, S.; Paleo, A. J.; Silva, J.; Hattum, F. W. J. van; Ares, A. I.Two different types of carbon nanofibers (CNF) were incorporated in the same polypropylene (PP) matrix by twin-screw extrusion. The electrical characterization of both CNFs / PP composites as a function of volume fraction show different electrical performance: conducting and non-conducting. The objective of this work is to study the rheological behaviour of both composites with the aim of relating it to the ele...
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...
GPGPU-assisted polymer nanocomposite modelling and characterisation
Pyrlin, Sergey V.; Ramos, Marta M. D.; Matveeva, Anna; Hattum, F. W. J. vanPoster "Advanced Hybrid Materials I I: design and applications" (Simposio P) ; Development of the hybrid materials with predefined properties by addition of inorganic nanoinclusions to a polymer material constitutes a hard challenge due to significant properties’ variations depending on inclusion’s distribution and interaction. To understand structure-property relations in such materials optical image analys...
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, ...
Aesthetic design using multi-objective evolutionary algorithms
Gaspar-Cunha, A.; Loyens, Dirk; Hattum, F. W. J. vanThe use of computational methodologies for the optimization of aesthetic parameters is not frequent mainly due to the fact that these parameters are not quantifiable and are subjective. In this work an interactive methodology based on the use of multi-objective optimization algorithms is proposed. This strategy associates the results of different optimization runs considering the existent quantifiable objective...
Development of reinforced composite sandwich panels based on 3D fabrics
Fangueiro, Raúl; Velosa, J. C.; Hattum, F. W. J. van; Soutinho, F.relative new type of sandwich material was investigated, based on 3D knitted sandwich fabric preforms. Due to the integrally interlacement of both sandwich-fabric the skins by the connection yarns – core debonding resistance of panels and structures based on the perform is very high. [1]. In this work the mechanical performance of sandwich composite panels based on sandwich knitted fabrics is presented and disc...
A study of the mechanical properties of vapour grown carbon fibres and carbon f...
Hattum, F. W. J. vanAs fibras de carbono produzidas na fase de vapor (VGCFs) combinam custos de produção potencialmente baixos com propriedades mecânicas, térmicas e eléctricas favoráveis. Isto torna-as de especial interesse para as aplicações onde as fibras de carbono, baseadas no pitch ou no poliacrilonitrilo (PAN) (designadas por fibras 'convencionais') são demasiado caras e as fibras de vidro não apresentam as propriedades nec...
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