La vigilancia tecnológica e inteligencia estratégica como herramienta de innovación para sectores productivos

El presente texto caracteriza el sector automotriz y el sector autopartista argentino. Se da cuenta de un breve diagnóstico de situación de la industria automotriz mundial y del sector autopartista en Argentina y de los principales actores que lo representan, como así también, las principales necesidades que presenta en la actualidad en términos de tecnología e innovación. Por otra parte, se realiza una descripción conceptual de todo lo relacionado a las disciplinas de Vigilancia Tecnológica e Inteligencia Estratégica (VTeIE) y la importancia de éstas enfocadas a sectores productivos. Se analizó y planteó una metodología para el desarrollo de productos de VTeIE que contengan información de valor estratégica para responder a las necesidades del sector autopartista y mejorar la toma de decisiones de los distintos actores del sector.The following text deals with the Argentine automotive and auto-part sectors. On one hand, a brief diagnostic of the world automotive industry situation and the Argentinian auto-part sector as well as the main actors who represent it and the principal technological and innovative needs are presented. On the other hand, a conceptual description related to the areas of Technological Security and Intelligence Strategy applied to a productive sector as the autopart one in the country is analysed

L’applicazione della diffrattometria dei raggi X per l’analisi del cedimento dei componenti meccanici

X-ray diffraction is a well-known experimental technique for measuring residual stresses inmetallic materials. If XRD is applied to the fracture surface of a broken part it becomes a fractographicaltechnique, that is to say that it is possible to relate the results of the measures to the loading condition thatlead a component to fail. In this paper, after an introduction about the technique, XRD fractography is appliedto a fatigue failed diesel engine crankshaft. It was possible to determine the load that lead the crankshaftto fail and to evidence some original aspects about the application of this technique to real machineparts

Effetto del pre-stress sul comportamento a fatica di elementi intagliati in acciaio inossidabile

Il trattamento di pretensionamento, o pre-stress, consiste nel sovraccaricare gli elementi di macchina con valori delle forze applicate tali da eccedere localmente, nei punti critici, lo sforzo di snervamento del materiale. In questo modo è possibile generare tensioni residue superficiali di compressione che contribuiscono a migliorare la resistenza a fatica degli elementi trattati. In questo lavoro si analizza il comportamento di provini intagliati di acciaio inox, precedentemente pretensionati e poi sollecitati a fatica assiale. La geometria dei provini è stata disegnata in modo da riprodurre nella maniera più fedele l???andamento degli sforzi nelle zone critiche rispetto all???elemento di macchina considerato. La misura degli sforzi residui e della rugosità, oltre all???analisi delle superfici di frattura hanno permesso di completare la caratterizzazione del comportamento dei provini dopo il trattamento di pre-stress. I risultati sono discussi criticamente e permettono di trarre indicazioni utili in sede di progetto

Coating by the Cold Spray Process: a state of the art

A brief description of cold spray coating process is presented. This paper intends to review some the previous works which are mostly about the influences of the cold spray parameters, mostly the surface ofthe substrate, on the deposition efficiency (DE). Almost all the important parameters, with more focus on the roughness of the substrate, on increasing the DE are briefly studied; this review also includes a description of application of cold spray and of some important effect of this method on substrate properties.On this basis, some possible development in this field of research are drawn and discussed

Photoelastic analysis of surface-cracked elements in presence of Hertzian contact and interposed fluid

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Coating by the Cold Spray Process: a state of the art

A brief description of cold spray coating process is presented. This paper intends to review some the previous works which are mostly about the influences of the cold spray parameters, mostly the surface of the substrate, on the deposition efficiency (DE). Almost all the important parameters, with more focus on the roughness of the substrate, on increasing the DE are briefly studied; this review also includes a description of application of cold spray and of some important effect of this method on substrate properties. On this basis, some possible development in this field of research are drawn and discussed

Failure analysis of a shaft of a car lift system

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Finite Element Simulation of Shot Peening Coverage with the Special Attention on Surface Nanocrystallization

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Effects of surfaces nanocrystallization induced by shot peening on material properties : a Review

A brief description of surface nanosrystallization process via severe plastic deformation is presented. To come to the point different shot peening methods which have proved to be able to create nanocrystalline layers are demonstrated clarifying the actual state of the art. Then the influence of the process is reviewed on material behavior and a wide range of affected properties are investigated. On this basis some possible addresses for future research in this field are drawn and underlined

3D Reality-Based Survey and Retopology for Structural Analysis of Cultural Heritage

Cultural heritage’s structural changes and damages can influence the mechanical behaviour of artefacts and buildings. The use of finite element methods (FEM) for mechanical analysis is largely used in modelling stress behaviour. The workflow involves the use of CAD 3D models and the use of non-uniform rational B-spline (NURBS) surfaces. For cultural heritage objects, altered by the time elapsed since their creation, the representation created with the CAD model may introduce an extreme level of approximation, leading to wrong simulation results. The focus of this work is to present an alternative method intending to generate the most accurate 3D representation of a real artefact from highly accurate 3D reality-based models, simplifying the original models to make them suitable for finite element analysis (FEA) software. The approach proposed, and tested on three different case studies, was based on the intelligent use of retopology procedures to create a simplified model to be converted to a mathematical one made by NURBS surfaces, which is also suitable for being processed by volumetric meshes typically embedded in standard FEM packages. This allowed us to obtain FEA results that were closer to the actual mechanical behaviour of the analysed heritage asset