Ciencias Exactas y Ciencias de la Salud
Permanent URI for this collectionhttps://hdl.handle.net/11285/551039
Pertenecen a esta colección Tesis y Trabajos de grado de las Maestrías correspondientes a las Escuelas de Ingeniería y Ciencias así como a Medicina y Ciencias de la Salud.
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- Design and evaluation of heat exchangers for cooling thermoelectricdevices using additive manufacturing(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2024-12-11) Gonzáles Garibay, Ángel Bernardo; Rodríguez González, Ciro Ángel; emipsanchez; Cedeño Viveros, Luis Daniel; School of Engineering and Sciences; Campus Monterrey; Martínez López José IsraelThermoelectric modules is a relatively new technology for air conditioning systems en abled by solid state semiconductor base, with major challenges in implementation such as efficiency and high implementation costs. This thesis focuses on the design and manufactureof heat exchangers (HXs)generated using additive manufacturing (AM) that take advantage of the use of free form geometries impossible to manufacture using conventional technologies. Specifically, tryply periodic minimal surface (TPMS) based structures, were tested. For the assessment, diverse gyroid designs with stretched axes were compared against a standard (not stretched) design and a traditional extruded flat fins heat exchanger. Computational fluid dy namics (CFD) simulations and experimental testing were conducted using a custom designed wind tunnel to characterize the temperature drop for these designs. Experimental data suggest that the charactersic high surface area-to-volume ratio of standard gyroids provides a limited performance compared to the stretched configuration. A stretched 4-row gyroid demonstrated the best temperature gradient of 9.21◦C, while the regular gyroid and the stretched 1-row gyroid performed the worst, with gradients of 6.44◦C and 6.05◦C, respectively. However, the convective heat transfer coefficient for the stretched 4-row gyroid was 188.41 W/m2 · K, lower than that of the extruded flat fins design, which was 197.18 W/m2 · K. This indicates that, although the stretched 4-row gyroid design exhibited the most efficient heat absorption, resulting in a significant improvement in the thermoelectric assembly’s efficiency, it still has room for optimization to enhance its convective efficiency. Such improvements could fur ther boost the overall performance of thermoelectric modules. This underscores the potential of optimized complex geometries to significantly enhance both the thermal and overall effi ciency of thermoelectric systems and opens the possibilities to see additive manufactured heat exchangers as feasible for enhancing thermoelectric modules for air conditioning systems.
- 4d printing research trends and applications in the medical field: a scientometric analysis(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2022-07-28) Padilla Aguirre, Karen Marcela; RODRIGUEZ SALVADOR, MARISELA; 20562; Rodríguez Salvador, Marisela; emijzarate, emipsanchez; Urbina Coronado, Pedro Daniel; Elizondo Noriega, Armando; Escuela de Ingeniería y Ciencias; Campus MonterreyInnovation plays a key role on a company’s either success or failure. But innovation is not just the creating or adopting new technologies; it is also directly connected with a solid strategic planning. Competitive technology intelligence is based on the systematic and ethical process of gathering, analyzing and transforming information into actionable knowledge. It aims to support decision making and strategic planning, because the knowledge produced by this methodology constitutes an early warning for research, development and innovation [19]. Three-dimensional (3D) printing is a technique of additive manufacturing that has revolutionized engineering, product design and manufacturing, as it allows the rapid conversion of digital 3D model information into physical static objects [45]. However, in the last few years a new possibility has been introduced to add ’time’ as a new dimension to create 4D printing. The medical field keeps changing and progressing at a high speed with new technologies emerging every day. 4D printing on the medical field is an area where it is necessary to provide decision makers with an overview of technological knowledge that helps them generate innovation opportunities. On this thesis, a Competitive technology intelligence approach was executed to identify trends in 4D printing technologies applied to the medical field, in order to provide relevant information through a technological landscape to support decision makers to uncover innovation opportunities. The results of the analysis revealed that most of the research developed is on the materials category, which relates completely to the fact that smart materials are the key difference between 3D and 4D printing. Most of the researches focus on shape memory polymers, hydrogels and liquid crystal elastomers. On the processes category researched is focused on the physical configuration of the printing model, printing parameters and adapting machines to modify the printing configurations. As for the applications, three main subcategories were identified, hollow tubes/stents, tissue engineering and drug delivery. According to the growth kinetics it is a field that although is fairly new, keeps growing and will keep gaining attention.
- Parametric modelling of a biomimetic propulsion system using additive manufacturing for autonomous underwater vehicles(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2021-12-01) Lima Rodríguez, Biali Fernando; Martínez López, José Israel; puemcuervo; Vázquez Lepe, Elisa Virginia; Chuck Hernandez, Cristina Elizabeth; School of Engineering and Sciences; Campus MonterreyThis work presents a novel pseudorandom algorithm for generating in-silico biomimetic models of caudal fins for additive manufacturing for flexible materials. The methodology provides a tool to develop caudal fin models for different morphologies (within rounded, truncated, forked, and lunate), geometrical features and, considering randomness to improve the lifelikeness of the model. The capability of the algorithm to generate designs with customized hydrodynamic features was evaluated in-silico using computational fluid dynamics comparing the maximum velocity and the angle of attack. Numerical data shows that customization of key dimensional can be integrated into a flexible and dynamic design process. This work is a step towards reproducing more robust and lifelike engineering systems.
- Optimization of Dimensional Variation for Additive Manufacturing Using Response Surface Methodology Technique for Lattices Structure(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2020-12-02) Betancourt Chacón, Diego Antonio; Sandoval Robles, Jesús Alejandro; puelquio/tolmquevedo; Hernández Luna, Alberto Abelardo; Rodríguez González, Ciro Angel; School of Engineering and Sciences; Campus Monterrey; Vázquez Lepe, Elisa VirginiaIn this work, metal powder bed fusion selective laser fusion (SLM) process was used for the fabrication of 3 different lattices structures because of its high resolution for complex geometries, there are plenty of research works in the parameter optimization for solid pieces, however, there is a lack of research for pieces with porosity and a micrometric scale where most of the measurements are not reported. To achieve this, different lattice geometries such as cubic, diamond and fluorite were manufactured, these were produced with different parameters, mainly varying the laser power, the scanning speed or exposure time, and scanning strategy using Surface Response Methodology to optimize the results. The struts from each lattice were measured in the Z and X axis, as well as the porosity of each piece. Additionally, compression test was performed to obtain the stress from the diamond a flourite lattice structure. The results are the parameters to manufacture pieces in micrometric scale for Renishaw AM400 with Stainless Steel 316L with a reduced dimensional difference from the CAD.
- A proof of concept system for the implementation of path planning strategies in the context of additive manufacturing of composites(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2020-06-05) Salinas Sáenz, Sergio Alejandro; Ahuett Garza, Horacio; ilquio/tolmquevedo; Orta Castañón, Pedro; Urbina, Pedro; School of Engineering and Sciences; Campus MonterreyIn recent years, the use of additive manufacturing (AM) technologies has increased significantly in industrial applications. In AM processes, which can produce complex shapes layer by layer, the end-product presents anisotropic properties that depend mostly on the deposition trajectory. The problem is that there is a bottleneck in research and improvement of these properties, due to limitations on the deposition trajectory control. In the case of commercial systems, the end-product mechanical properties are not taken into consideration, and the limited selectable options impedes the designer’s tool-path strategies to be implemented. This thesis presents a proof of concept system integrated by an adapted machine system and a software framework that allows the designer to implement and test the path planning strategies for the deposition trajectory control. An overview of the hardware conditioning is explained, and a proof of concept strategy is proposed for increasing the deposition trajectory continuity, as a proof of use of the system in the context of additive manufacturing of composites.
- Volumetric bioprinting for medical applications(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2020-06-05) López Franco, Arturo; VARGAS ROSALES, CESAR; 33901; Vargas Rosales, César; RR; Zhang, Yu Shrike; School of Engineering and Sciences; Campus Monterrey; Galaviz Aguilar, José AlejandroAdditive manufacturing (3D printing) has been a widely used tool in a lot of different industries. Among these industries can be found tissue engineering and regenerative medicine, since bioprinting is one of the main techniques applied. The implementations of new technologies for additive manufacturing, have been adapted into the bioprinting area for medical purposes. Additive manufacturing technologies have been evolving from printing point-to-point, layer-by-layer, and more recently volumetric printing, which represents printing a whole volume simultaneously. In this thesis is presented a new technique for bioprinting, the Computed Axial Lithography (CAL) printing, which is a recently additive manufacturing technology based on reconstruct- ing a volume simultaneously, has demonstrated to have advantages against other additive manufacturing techniques, improving the printing speed, the resolution, minimum material waste, and more, and its application in the medicine industry has not been explorer looking very promising for this research field with limitless applications. The bioink used in the experiments presented is a GelMA-based hydrogel, and the 3D structures achieved should be capable of present biocompatibility with living organisms. For this thesis, the reproduction of the CAL printing for biomaterials, in this particular case GelMA, is proved, opening the doors for applying the same concept to different biomaterials, which could have limitless applications in many distinct research areas.
- Towards a Selective Laser Melting Process Parameters Optimization Approach using Regression Algorithms for Inconel 718 Manufactured Parts(Instituto Tecnológico y de Estudios Superiores de Monterrey) Arias López, José Alejandro; Romero Díaz, David Carlos; Rodríguez González, Ciro A.; Vázquez Lepe, Elisa V.; Escuela de Ingeniería y Ciencias; Escuela de Ingeniería y Ciencias; Campus Monterrey; Ruiz Huerta, LeopoldoIn recent decades, Additive Manufacturing (AM) technologies have received increasing interest from both academia and industry. Thanks to an unprecedented opportunity to create designs and products difficult to create through conventional manufacturing processes, such as those from subtractive manufacturing, the understanding of these processes have become imperative for the creation of reliable products. Different processes may produce parts from different materials, and from the many processes available, Powder Bed Fusion (PBF) stands out for its capacity to produce high-quality products with metallic alloys. From these metallic alloys, nickel-based superalloys are of particular interest for the aerospace and defence industry, because it possesses excellent mechanical properties during high-performance applications, such as those found in turbines, where high stresses and high temperatures bring design and engineering to its limits. Novel crystallographic structures, process complexity, and mechanical defects are but a few of the challenges AM technologies face to produce consistent and reliable parts. Selective Laser Melting (SLM), a subprocess of PBF, has been found to produce defects such as porosities and rough surfaces on additively manufactured parts, which have been found to hinder the fatigue life of as-built products. This research attempts to understand the relationships between variables involved in the SLM process and the formation of these defects. To achieve this, a literature review is realized to create a causal-loop that helps to understand the impact and correlation between the variables involved in the process, and their effect on the mechanical properties of the part. A compilation of governing equations, boundary conditions, and loads was also reviewed to allow the simulation of the SLM process on a Finite Element (FE) environment. Finally, regression analysis is made to determine the significance of the impact the process parameters and temperature gradients determined through the FE Analysis have over the mechanical defects. Recommendations based on this analysis for optimal process parameters values are given. Further research is required to analyse the impact of process parameters on the formation of residual stresses and crack formation.
- Fatigue properties of metallic additively manufactured samples(Instituto Tecnológico y de Estudios Superiores de Monterrey) Villarreal Arizpe, Gerardo; Ciro Ángel, Rodríguez González; Jiménes Martínez, Moisés; Campus Monterrey; Cuan Urquizo, EnriqueThe present research was focused in the comparison between four designs of metallic additive manufactured samples with different stress concentrator on each design. The approach was to manufacture a batch of samples from each design and compare the fatigue performance (SN Curve). In this work, the batches of samples were manufactured of 316L stainless steel alloy and the four designs of samples were tested, one design consists in a solid bar and the other three designs were developed with a hole as a stress concentrator in the middle of the bar, the diameter of the holes varies through the three different designs. The advantage of using 3D printing is that this process is easier to manufacture and use than the traditional manufacturing, especially for complex structures, that is why it has become in one of the main alternatives to manufacture industrial parts with the use of high performance metals and polymers. To evaluate the aforementioned performance, in terms of manufacturability a geometry validation of each design has been done. The design of experiments was proposed to present the detail of the characterization of the experiments based on an infrared thermography. The temperature patterns of the hot spot zone are tightly linked with the physical evolution of the fatigue damage. To achieve the objective of the research and obtain an accurate Stress vs Number of cycles to failure (SN curve), an statistical analysis of each measurable variable was made, this to observe the performance of the samples from each design. The remarkable results obtained, were used to provide a viable guidelines to select a manufacturing process oriented to present solid recommendations in order to contribute for future works an affordable additive manufacturing process to utilize in industrial parts, this based in the performance of the specimens.
