Persona: Claver Gil, Juan
Cargando...
Dirección de correo electrónico
jclaver@ind.uned.es
ORCID
0000-0002-1840-2505
Fecha de nacimiento
Proyectos de investigación
Unidades organizativas
Puesto de trabajo
Apellidos
Claver Gil
Nombre de pila
Juan
Nombre
16 resultados
Resultados de la búsqueda
Mostrando 1 - 10 de 16
Publicación Computational design methodology for additive manufacturing to enhance customised products and process management efficiency(Elsevier, 2025-05-24) García Domínguez, Amabel; Claver Gil, Juan; Camacho López, Ana María; Sebastián Pérez, Miguel ÁngelThe emergence of Additive Manufacturing (AM) provides new horizons for innovation and optimization of designs. However, the limited knowledge of Design for Additive Manufacturing (DfAM) and the constraints imposed by conventional DfAM frameworks are hindering the potential of AM. The scope of recent studies, focused on algorithmic approaches, is limited to certain aspects of the problem and does not offer a comprehensive solution to generate efficient custom designs. To overcome these limitations, the role of interdisciplinary and transversal DfAM methodologies is essential. This work presents a DfAM methodology based on computational design with a continuous dataflow for the integration of all the design phases of a knowledge-based DfAM framework in a single algorithm, from initial design stages to machine code generation, what fully exploits the potential of additive technologies in customized products. This facilitates the integration of key data relationships and connections, promoting the development of intelligent and efficient open systems. Firstly, a bibliographic review on actual knowledge-based DfAM framework is exposed. Then, the proposed methodology is detailed and discussed. Furthermore, its potential applied to customized parts with specific mechanical requirements is validated through a splint design case study. Finally, the proposed methodology advantages and limitations are discussed.Publicación Optimization methodology for additive manufacturing of customized parts by fused deposition modeling (FDM). Application to a shoe heel(MDPI, 2020-09-17) García Domínguez, Amabel; Claver Gil, Juan; Sebastián Pérez, Miguel ÁngelAdditive manufacturing technologies offer important new manufacturing possibilities, but its potential is so big that only with the support of other technologies can it really be exploited. In that sense, parametric design and design optimization tools appear as two appropriate complements for additive manufacturing. Synergies existing between these three technologies allow for integrated approaches to the design of customized and optimized products. While additive manufacturing makes it possible to materialize overly complex geometries, parametric design allows designs to be adapted to custom characteristics and optimization helps to choose the best solution according to the objectives. This work represents an application development of a previous work published in Polymers which exposed the general structure, operation and opportunities of a methodology that integrates these three technologies by using visual programming with Grasshopper. In this work, the different stages of the methodology and the way in which each one modifies the final design are exposed in detail, applying it to a case study: the design of a shoe heel for FDM—an interesting example both from the perspectives of ergonomic and mass customization. Programming, operation and results are exposed in detail showing the complexity, usefulness and potential of the methodology, with the aim of helping other researchers to develop proposals in this line.Publicación Metodología para el análisis e interpretación de bienes patrimoniales españoles de tipo industrial. Aplicación al estudio de los bienes de la Comunidad Autónoma de Madrid(Universidad Nacional de Educación a Distancia (España). Escuela Técnica Superior de Ingenieros Industriales. Departamento de Ingeniería de Construcción y Fabricación, 2016-04-27) Claver Gil, Juan; Sebastián Pérez, Miguel ÁngelEn la presente tesis se define una metodología global compuesta de tres desarrollos parciales con entidad propia e independencia, pero complementarios y que se integran dentro de un enfoque integral para el estudio de los bienes inmuebles patrimoniales de tipo industrial, que abarca desde la identificación de elementos hasta la actuación sobre ellos de cara a su adecuada reutilización. De este modo, en un primer lugar se aborda la identificación, selección y clasificación de bienes inmuebles industriales y, posteriormente, a través de Ja adaptación de la técnica multicriterio de ayuda a la decisión conocida como Proceso Analítico Jerárquico (AHP), se diseñan herramientas para la valoración patrimonial de bienes y la valoración y selección de posibles nuevos usos. Fruto de la primera parte del trabajo se elabora un Catálogo Propio con una muestra de 1354 bienes y una completa estructura de criterios de aplicación común a todos ellos, permitiendo una gran variedad de análisis que hacen posible caracterizar bienes concretos, conjuntos de bienes o territorios. Las herramientas de valoración multicriterio propuestas permiten, en última instancia, identificar los usos menos agresivos para la conservación de las características contenedoras de valor patrimonial desde el punto de vista industrial. Para ello, se vinculan la valoración patrimonial y la valoración de la compatibilidad con los nuevos usos, de cara a incorporar en la selección de la nueva actividad la influencia del valor patrimonial identificado.Publicación Injection Mold for Plastics Manufactured by Metal-FFF with Conformal Cooling Channels: A Proof-of-Concept Case(MDPI, 2025-09-01) Solis, José Enrique; Claver Gil, Juan; Marín Martín, Marta María; Rubio Alvir, Eva María; García Domínguez, AmabelInjection molding is widely used for mass-producing plastic components, demanding precise thermal control to optimize cycle times and part quality. Traditional CNC-machined molds limit design flexibility and restrict advanced cooling features like conformal cooling channels (CCCs). Integrating CCCs improves cooling performance, reduces cycle times, and offers more efficient, cost-effective designs. Additive manufacturing (AM), especially Metal-Fused Filament Fabrication (Metal-FFF), offers geometries unattainable by machining. While most mold research focuses on Laser Powder Bed Fusion (LPBF), the feasibility of Metal-FFF molds remains underexplored. This study presents the design, fabrication, and experimental evaluation of an injection mold produced via Metal-FFF with integrated CCCs. The process included computational design, resistance simulations, fabrication, debinding, sintering, and post-processing, followed by testing under injection molding conditions. Results show that Metal-FFF molds with CCCs boost cooling efficiency, cutting cycle times by about 30% compared to conventional molds, while offering greater design freedom and economic benefits. Nonetheless, issues such as porosity and shrinkage need further refinement to fully leverage this technology for industrial use.Publicación Considerations on the Applicability of Test Methods for Mechanical Characterization of Materials Manufactured by FDM(MDPI, 2019-12-19) García Domínguez, Amabel; Claver Gil, Juan; Camacho López, Ana María; Sebastián Pérez, Miguel ÁngelThe lack of specific standards for characterization of materials manufactured by Fused Deposition Modelling (FDM) makes the assessment of the applicability of the test methods available and the analysis of their limitations necessary; depending on the definition of the most appropriate specimens on the kind of part we want to produce or the purpose of the data we want to obtain from the tests. In this work, the Spanish standard UNE 116005:2012 and international standard ASTM D638–14:2014 have been used to characterize mechanically FDM samples with solid infill considering two build orientations. Tests performed according to the specific standard for additive manufacturing UNE 116005:2012 present a much better repeatability than the ones according to the general test standard ASTM D638–14, which makes the standard UNE more appropriate for comparison of different materials. Orientation on-edge provides higher strength to the parts obtained by FDM, which is coherent with the arrangement of the filaments in each layer for each orientation. Comparison with non-solid specimens shows that the increase of strength due to the infill is not in the same proportion to the percentage of infill. The values of strain to break for the samples with solid infill presents a much higher deformation before fracturePublicación Application of AHP in the selection of additive manufacturing equipment based on the use of artifacts(Emerald, 2025-11-11) García Domínguez, Amabel; Sánchez-Pérez, David; León-Calero, Marina; Rodriguez-Hernandez, Juan; Claver Gil, JuanPurpose Additive manufacturing (AM) has already become a real manufacturing trend and the presence of these technologies in technological companies, research centers, universities or schools is actually normal together with a significant increase of the number and variety of equipment available in each one of these contexts. Thus, choosing the most suitable process, equipment or material arise as a new goal to face because the complexity and impact of these decisions is much higher now than when the implementation of AM was at initial stages. This paper aims to explore the adaptive capacity of multi-criteria decision making (MCDM) techniques, specifically the Analytic Hierarchy Process (AHP), to help channel these complex decisions. Design/methodology/approach In this study, an initial methodological approach is carried out based on the combination of AHP with the manufacturing and metrological inspection of artifacts obtained from the set of printers available as alternatives. Findings Through a study case, the strengths and weaknesses of the proposed methodological approach are assessed and scenarios in which this kind of approaches can be useful are identified, drawing conclusions to guide the following steps in this line of research. Originality/value The application of MCDM techniques to guide decisions similar to those raised in this study, as well as the use of artifacts to assess the performance of available alternatives in response to certain needs of the design to be manufactured, has been addressed in the scientific literature. However, the combined use of both strategies proposed in this work is novel.Publicación Proposals for the optimization of parts for additive manufacturing(Publicaciones DYNA, 2018-05-01) García Domínguez, Amabel; Claver Gil, Juan; Sebastián Pérez, Miguel ÁngelAdditive manufacturing allows greater freedom and new possibilities for designers. Thus, at the manufacturing stage, additive manufacturing has very few geometrical limitations in comparision with traditional manufacturing process. In that context, the optimization of the designs grows in importance. Both topology and multiobjective optimization are fields of great interest as links between the Computer-Aided Design of pieces and the new additive manutacturing techonologies. But these kind of approaches have problems related to the non continuous work flow during the optimization process. This work exposes an initial aproximation to topology and multi-objective optimization of pieces obtained by 3D printing by using the solvers included on the software Grasshopper, which work through structures designed by graphic computer programming. Then, 3D models of the pieces are analyzed in order to determinate the resistance and service behaviour of the optimized designs, and the pieces are obtained by 3D printing in order to check their printability.Publicación Analysis of Restrictions on Public Funding and Management of R&D Projects Arising from Legislation: The Case of the Spanish Context(MDPI, 2024-11-07) Coca Valdés, Pablo Luis; García Domínguez, Amabel; Claver Gil, JuanThis article examines the challenges posed by national legislative frameworks in the European Union Member States regarding the management of publicly funded research and development (R&D) projects. Taking the case of Spain and its General Subsidies Act as an example, this study analyzes 55 R&D funding calls published by the Spanish Central Administration in 2021 and 2022. This research identifies key challenges associated with change management in these projects. This research performed a detailed review of relevant legislation and its application to R&D projects, alongside an analysis of regulatory bases making use of a flexibility index (FI) to assess the adaptability of grant conditions. Also, quantitative methodologies like Pearson’s correlation coefficient and principal component analysis were employed. The findings reveal that flexibility in project management, particularly concerning changes in scope, budget, and timeframes, is limited due to the rigidity of the legal framework. This lack of flexibility means a significant challenge for effective project execution, which inherently requires adaptability to manage uncertainty. This research suggests that future reforms should prioritize greater legal flexibility to improve the efficiency and success of publicly funded R&D initiatives. These findings contribute to the broader understanding of how regulatory constraints impact innovation management.Publicación Lattice Structures in Additive Manufacturing for Biomedical Applications: A Systematic Review(MDPI, 2025-08-23) Polo, Samuel; García Domínguez, Amabel; Rubio Alvir, Eva María; Claver Gil, JuanThe present study offers a systematic review of the current state of research on lattice structures manufactured by additive technologies for biomedical applications, with the aim of identifying common patterns, such as the use of triply periodic minimal surfaces (TPMS) for bone scaffolds, as well as technological gaps and future research opportunities. Employing the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) methodology, the review process ensures methodological rigor and replicability across the identification, screening, eligibility, and inclusion phases. Additionally, PRISMA was tailored by prioritizing technical databases and engineering-specific inclusion criteria, thereby aligning the methodology with the scope of this field. In recent years, a substantial surge in interdisciplinary research has underscored the promise of architected porous structures in enhancing mechanical compatibility, fostering osseointegration, and facilitating personalized medicine. A growing body of literature has emerged that explores the optimization of geometric features to replicate the behavior of biological tissues, particularly bone. Additive manufacturing (AM) has played a pivotal role in enabling the fabrication of complex geometries that are otherwise unachievable by conventional methods. The applications of lattice structures range from permanent load-bearing implants, commonly manufactured through selective laser melting (SLM), to temporary scaffolds for tissue regeneration, often produced with extrusion-based processes such as fused filament fabrication (FFF) or direct ink writing (DIW). Notwithstanding these advances, challenges persist in areas such as long-term in vivo validation, standardization of mechanical and biological testing, such as ISO standards for fatigue testing, and integration into clinical workflows.Publicación Multicriteria Decision Tool for Sustainable Reuse of Industrial Heritage into Its Urban and Social Environment. Case Studies(MDPI, 2020-09-10) Claver Gil, Juan; García Domínguez, Amabel; Sebastián Pérez, Miguel ÁngelMost of industrial heritage assets need new activities to ensure their survival. In addition, the collection of assets is very broad, many of their locations have now become central and are targets for speculation, and the nature of these sites displays great specialization. Consequently, processes for reusing these assets are necessary to conserve them, but they risk destroying features whose value has been inadequately identified. This work faces this multicriteria problem by adapting the Analytic Hierarchy Process (AHP) to create two independent criteria structures, one for heritage valuation and another for analyzing the spatial compatibility with new uses, and then connecting them considering the relations between criteria of both structures and the relevance of the heritage aspects involved. All this to select those activities that cause minimal harm to the heritage value to be conserved. This work analyses three case studies to evaluate the performance of a tool based on an adaptation of AHP. The results are exposed and some application guidelines are provided, since doubts in the way to applying and interpreting the criteria are in practice a common problem of this type of approaches and that is rarely addressed. Thus, this work shows the potential of the proposed tool as a resource for sustainable urban development strategies.