ResumenEn este trabajo se describen las diferentes actividades docentes que pueden realizarse con los sistemas de autoevaluación del aprendizaje están incluidas en muchas actuales entornos virtuales basados el servicio web.Junto a cada una ellas indican algunas experiencias reales llevadas cabo por propios autores y otros profesores

Laser Shock Processing (LSP) is increasingly applied as an effective technology for the improvement mechanical and surface properties of metallic materials different types components, mostly a means enhancement their fatigue life behavior. As reported in previous contributions, main effect resulting from application LSP technique consists generation relatively deep compression residual stresses fields allowing improved In this paper, special case Ti-6Al-4 V alloy considered with specific...

In the present paper, a model is presented aiming to provide physical basis for theoretical estimation of both plasma expansion dynamics following laser irradiation and shock wave propagation into treated material with specific consideration its constitutional properties (i.e. taking account real mechanical E.O.S. parameters). Although initially limited 1D description, proposed aims overcome difficulties existing an accurate process due behavior not directly amenable analytical solutions...

Laser shock processing (LSP) has been presented as an effective technology for improving surface mechanical and corrosion properties of metals, is being developed a practical process amenable to production engineering. The main acknowledged advantages the laser technique consist on its capability inducing relatively deep compression residual stresses field into metallic alloy pieces allowing improved behaviour, explicitly, life improvement treated specimens against wear, crack growth stress...

This work sets out an innovative methodology that aims to facilitate the implementation and continuous improvement of social responsibility. It is a takes account strategic-economic, environmental questions allows measuring impact each these aspects on stakeholders value areas. can be extrapolated all kinds organisations regardless their size sector admits scalable models. A marked feature it aside from other methodologies eliminates subjectivity qualitative introduces algorithm quantify them.

One of the main limiting factors for a widespread industrial use Selective Laser Melting Process it its lack productivity, which restricts this technology just high added-value components. Typically, thickness metallic powder that is used lies on scale micrometers. The layer up to one millimeter would be necessarily associated dramatic increase productivity. Nevertheless, when increases, complexity consolidation phenomena makes process difficult governed. present work proposes 3D finite...

In recent years, an increasing interest in designing magnesium biomedical implants has been presented due to its biocompatibility, and great effort employed characterizing it experimentally. However, complex anisotropic behaviour, which is observed rolled alloys, leads a lack of reliable numerical simulation results concerning residual stress predictions. this paper, new model proposed focus on material hardening behaviour Mg base (in particular AZ31B as representative alloy) materials, the...

Sobre la base de modelos numéricos, desarrollados por los autores para el análisis predictivo procesos tratamiento térmico superficial aceros láser, se analiza, desde un punto vista computacional, influencia del factor solapamiento en superficies extensas dichos materiales mediante ciclos parcialmente superpuestos irradiación láser. En análisis, tienen cuenta, explícitamente, las propiedades termofísicas considerados así como su dependencia térmica, estableciéndose, finalmente, diversos...

This work aims at suitably combining hands-on and remote practices in the teaching of automatic control subjects. Virtual Remote Laboratories Automatic education have increasingly become a method utilized by universities their efforts to offer greater schedule flexibility operation available resources. paper discusses implementation experiments for Control through both Distance Laboratory System (SLD), developed Universidad Central Marta Abreu de Las Villas, AulaWeb, ETSI Industriales...

The effect of process parameters and the orientation cladding layer on mechanical properties 316L stainless steel components manufactured by laser metal deposition (LMD) was investigated. High aspect-ratio walls were with layers a 4.5 mm wide single-cladding track to study microstructure along length height wall. Samples for tensile test (according ASTM E-8M-04) machined from wall both direction perpendicular them. Cross-sections LMD samples analyzed optical scanning electron microscopy...

An inverse approach for the Laser Surface Hardening Process is proposed. It departs from specific austenization requirements in terms of a desired size austenized region at any cross section treated sample, aiming calculating suitable process parameters to obtain it. This contrasts with conventional direct procedures, thermal cycles and austenite distribution, where stochastic design strategies, falling on dynamics successive approximations, are performed. A thermo-metallurgical numerical...

This work studies two simplified models described in the bibliography, developing a practical methodology for estimation of working windows, taking into account wide set characteristics. Firstly, main equations and relationships from are shown, then, particular steel, variety characteristic diagrams has been realized, finally, using some them, windows requirements have calculated.

Profiting by the increasing availability of laser sources delivering intensities above 109 W/cm2 with pulse energies in range several Joules and widths nanoseconds, shock processing (LSP) is being consolidated as an effective technology for improvement surface mechanical corrosion resistance properties metals developed a practical process amenable to production engineering. The main acknowledged advantage LSP technique consists on its capability inducing relatively deep compression residual...