Santiago Ferrándiz Bou

Effects of fibre orientation and content on the mechanical, dynamic mechanical and thermal expansion properties of multi-layered glass/carbon fibre-reinforced polymer composites

Multi-layered glass and carbon-reinforced polymer composites may exhibit unique properties comparatively with the benchmark, proven they are being tailored bounded by several requirements. The paper herein approaches issues on the influence of the various contents and orientation of UD carbon fibre constitutive on the mechanical, dynamical and thermal expansion if embedded along with glass fibres in different stacking sequencing within an unsaturated polymer resin. The results show that the architectures with the highest content of carbon fibres (e.g. GF:CF(60:40) – 0° and 90°) provide the best tensile and flexural properties, and behave better under dynamical loading conditions and temperature variations, no matter the orientation directions. In addition, it was shown that a thorough understanding can be attained, with respect to the UD carbon fibre content, and different orientations influence on the overall composite material properties, taking into account the data retrieved from dynamical and thermal expansion runs.Multi-layered glass and carbon-reinforced polymer composites may exhibit unique properties comparatively with the benchmark, proven they are being tailored bounded by several requirements. The pape...

Reconstrucción tridimensional de superficies en el cuerpo humano

A study on the alignment process of data of human morphology obtained by laser acquisition devices is presented in this paper. A three-dimensional latest generation digitizer is used and a methodology of alignment for the human morphology data is established. Also, guides on how to solve problems of this alignment are discussed and a comparative study of point clouds processing programs is carried out. RapidFormTM, the standard software used for editing data acquired by the scanner 3D is compared with PolyworksTM, the alternative to RapidFormTM software used due to its good characteristics for the alignment mechanical parts. Results of the comparison of some software applications are showed.Resumen Se presenta un estudio del proceso de alineacion de datos obtenidos de morfologias humanas mediante un dispositivo de adquisicion por laser. Se utiliza un dispositivo digitalizador tridimensional de ultima generacion y se establece una metodologia de trabajo para el proceso de alineacion de los datos obtenidos de morfologias humanas. Ademas, se indican las directrices para resolver los problemas derivados de esta alineacion y se realiza el estudio comparativo de programas de tratamiento de nubes de puntos. RapidForm™, el software estandar utilizado para la edicion de los datos adquiridos por el escaner 3D es comparado con Polyworks™, el software alternativo a RapidForm™, debido a su calidad de alineamiento de piezas mecanicas. Resultados de la comparacion de algunas aplicaciones de los programas son presentados y discutidos. Palabras clave: reconstruccion 3D, morfologias humanas, alineacion de datos, RapidForm, Polyworks Three-dimensional reconstruction of surfaces in human body

Las tecnologías de la información y la comunicación aplicadas a la programación de sistemas de fabricación flexible

Desde hace aproximadamente 5 anos la proliferacion de redes sociales ha sido una constante dentro de la red. Este hecho ha hecho que se cambien las formas de entender la comunicacion y que el paradigma de Laswell [1] haya necesitado de nuevos elementos a anadir a la comunicacion como son la inmediatez y el controlar o seguir una estrategia a traves de las redes para que las criticas vertidas en nuestros perfiles o en los de nuestras empresas no se conviertan en algo que no podamos controlar y que repercuta negativamente en el ambito de la imagen y de la opinion publica bien de nuestra persona, de nuestra organizacion o de nuestra marca.

Tailoring Thermal Properties of Hybrid Glass Fibers/Carbon Fibers Reinforced Polymeric Composites

The herein paper tackles the issue of dimensional stability of composite materials from the perspective of characterization the overall linear coefficient of thermal expansion (CTE) for different hybrid polymeric composite architectures tailored with the aim of lowering the manufacturing costs and fulfilling few design requirements in several engineering applications. The hybrid configurations are made of unidirectional carbon fibers (max. 1 or 2) embedded along with different combinations of E-glass woven roving or chopped E-glass strand mat as wear/chemical resistant, outside reinforcement layers. A polyester resin type was used as binder. The thermal properties were measured using a differential dilatometer DIL 402 PC/1 from NETZSCH GmbH (Germany) imposing a linear, monotonic temperature rise with 1 K/min from 20°C up to 250°C. Thermal cycling behavior was underlined by imposing two successive heating cycles upon each hybrid composite samples. Thermal strains temperature/time evolution and peak values are further analyzed to size the thermal aging effects. The experimental retrieved data will be further compared with the values obtained by running a micromechanical based approach simulation on the DIGIMAT software (from X-stream Engineering Inc., Luxembourg).Copyright