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.
Browse
Search Results
- 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.
- Mechanical characterization and design of square honeycombs with the aid of additive manufacturing and AI(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2024-05-07) Herrera Ramos, Gustavo; Cuan Urquizo, Enrique; emimmayorquin; Román Flores, Armando; Mora Córdova, Ángel; Escuela de Ingeniería y Ciencias; Campus Monterrey; Batres Prieto, RafaelMetamaterials offer a viable mean to attain targeted mechanical characteristics tailored to particular loading conditions. Aperiodic metamaterials provide higher tailorability of mechanical behavior by providing a customizable deformation mode, properties, and mechanical response. Artificial intelligence has enhanced metamaterial design by discerning correlations between parameters and mechanical characteristics. This work studies two types of gradation on square honeycombs: wall thickness and wall angle. The studied gradation characteristics were wall inclination, pattern distribution, and direction. Fifteen designs were proposed, each combining different gradation characteristics. The designs were additively manufactured with PLA on an FFF 3D printer and experimentally tested under compression. The effects of the gradation characteristics on the mechanical response, mechanical properties, and deformation mode were analyzed. The results confirmed the influence of gradation on the mechanical behavior of the structures. The gradation characteristics influence specific properties or responses, such as a 30% energy absorption difference between graded honeycombs with aligned and not aligned walls. The metamodel evolutionary optimizer (MEVO) algorithm was used to assist in the design of a tailored square honeycomb with an angle gradation to minimize the displacement of a designated point in the structure. The algorithm was tested on multiple nonconventional loading scenarios to prove its versatility.
- Comparative analysis between joining stacking based laser micro spot welding (JS-LMSW) and laser powder bed fusion (LPBF) for guided bone regeneration(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2024-01) Morales Fierro, Alan Giovanni; Sandoval Robles, Jesús Alejandro; mtyahinojosa, emipsanchez; Cedeño Viveros, Luis Daniel; Rodríguez García, Aída; School of Engineering and Sciences; Campus Monterrey; García López, ErikaDental devices, such as periodontal membranes used in the Guided Bone Regeneration (GBR) treatment, need to be manufactured with specific requirements to reach the quality desired. In this project, a periodontal membrane was manufactured by Joining Stacking Based Laser Micro Spot Welding (JS-LMSW) and Laser Powder Bed Fusion (LPBF). The objectives of this project were to design a periodontal membrane based on an imaged-based tomography, to identify the parameters for JS-LMSW and LPBF, and to characterize dimensionally the membranes. For JS-LMSW, an experimental design was carried on by changing parameters such as time exposure (1, 4, 7, 10 ms) and power (160, 180, 200 W). It was observed that the samples with the best quality profile were 160W/1ms, 180W/7ms, and 200W/10ms. For LPBF, it wasn’t possible to obtain the membrane with the original measurements. Also, all the periodontal membrane samples were electropolished. It was possible to design a periodontal membrane from a real case, the parameters of JS-LMSW were identified, and electropolishing improved dimensionally some measurements of the membrane.
- Impact of powder recycling strategy on additively manufactured Inconel 718 parts using LPBF-M(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2024) García Faustino, Litzy Lilián; Ulloa Castillo, Nicolás Antonio; mtyahinojosa, emipsanchez; Segura Cárdenas, Emmanuel; Vázquez Lepe, Elisa Virginia; Ramírez Cedillo, Erick Guadalupe; School of Engineering and Sciences; Campus Monterrey; Ruiz Huerta, LeopoldoLaser powder bed fusion for metals (LPBF-M) has been key not only to manufacture parts with complex designs, but also to optimize the use of the powder material involved in the process. The latter has encouraged the investigation of recycling strategies based on the reuse of the metal powder not consumed in a previous building cycle. However, a constraint about such strategies is that the structural and morphological properties of the metal powder can be modified due to the thermal phenomena induced by the laser, which can impact negatively on the physical properties of the manufactured part. For this reason, and with the aim of validating the implemented recycling strategy it is desirable to explore analytical methodologies capable of assessing the morphological evolution of metal powder and the microstructural evolution of the manufactured parts, among others. This thesis report on the microstructural evolution of Inconel 718 parts manufactured by LPBF-M process using a recycling strategy which consisted of filling up the missing and the solidified powder with virgin one (80 cm3) along 22 building cycles. The evolution of crystal structure for built parts and sieved powders was investigated by XRD through the analyses of the main crystalline phases (𝞬, 𝞬´ and 𝞬´´) and their peak positions. The presence of recycled powder from previous building cycles was identified by two means, a shifting of the peak positions and the precipitations detected. Both are caused by the constant interaction between metal powder and laser. The crystalline phase transformation between 𝞬´ and 𝞬´´ was assessed by a Rietveld analysis along the building cycles. The distribution of grains and, in general, the microstructural evolution was evaluated by SEM and energy dispersive spectroscopy (EDS) for elemental mapping analyses. The findings of this research contribute not only to understand impact of reusing metal powder for built parts, via the study of crystal structural evolution and its influence in their physical properties, but also determining viable routes to optimize the storage of powder by estimating its effective lifetime when used for consecutive building cycles.
- Validation of the process parameter for enhancing densification and thermal conductivity of the IN718 superalloy manufactured by selective laser melting(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2023-06-16) Rosete Taboada, Diana Ximena; Elías Zúñiga, Alex; puemcuervo, emimayorquin; Olvera Trejo, Daniel; School of Engineering and Sciences; Campus Monterrey; Martínez Romero, OscarThis thesis proposal aims to investigate the enhancement of thermal and physical properties in Selective Laser Melting (SLM) metallic components, focusing on the improvement of the processing parameters. The research is conducted as part of the master’s degree program in Science in Manufacturing Systems. Additively manufactured metal-based samples face challenges related to microstructural changes and defects impacting their properties. The proposed study addresses these issues by exploring two key factors: the metal powder used and processing parameters. Specifically, the research aims to determine the impact of the processing parameter modification on the mechanical, physical, and thermal properties of additively manufactured metal-based samples using Inconel 718 powder. The goal is to determine the adequate processing parameters, that result in an enhancement in the densification, and thermal conductivity of the IN718 AM samples, aligning with the desired properties outlined in the scientific literature
- Volumetric heating in digital glass forming(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2023-06-01) Deutsch Garcia, Luis; Ahuett Garza, Horacio; emipsanchez; Urbina Coronado, Pedro Daniel; Landers, Robert G.; Orta Castañón, Pedro Antonio; School of Engineering and Sciences; Campus Monterrey; Kinzel, Edward C.This research study investigates the use of volumetric heating in Digital Glass Forming (DGF) to enhance heat absorption and deposition rates in the glass printing process. A 1070 nm wavelength laser and various art glasses with colorants are explored to improve the volumetric heat absorption capacity of the soda-lime glass. A coaxial configuration is implemented to achieve uniform heating in filaments. The achieved deposition rates (V̇ = 15.7 mm3 /s) surpass previous reports in the literature. The study examines the behavior of glass material during printing and identifies different morphologies under varying conditions. Limitations include heat absorption restrictions within the glass and the occurrence of bubbles inside the filament. Simulation results suggest an optimal deposition rate where the glass can be deposited at higher speeds without encountering bubbles or defects by carefully adjusting the Optical Penetration Depth (OPD) of the glass filament This research contributes to overall DGF process, optimizing deposition rates, and identifying areas for future research. It demonstrates the potential of volumetric heating and lays the groundwork for advancements in glass manufacturing processes.
- Structural validation of a patient specific 3D printed prosthetic socket, using Finite Element Analysis(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2023-03-01) Elizondo Rueda, Adrian Rogelio; Rodríguez González, Ciro Ángel; puemcuervo, emimayorquin; Segura Ibarra, Víctor; Vázquez Lepe, Elisa Virginia; School of Engineering and Sciences; Campus Monterrey; Tejeda Alejandre, RaquelTranstibial amputations are unfortunate surgeries that leave patientes without a lower limb. Given patient-specific needs, tailored made prosthetic legs must accommodate to each patient. With the use of novel technonologies such as Computed Aided Design (CAD) and Computer Aided Engineering (CAE) we simulated the mechanical behavior of a prothetic socket made of polyamide 12, manufactured by powder bed fusion techonology. Following the ISO10328 guidelines, herein we evaluated the mechanical integrity this patient-specific prosthetic socket by Finite Element Analysis (FEA) under loading conditions for the two critical phases of the gait cycle, which are heel strike and toe off.
- 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.
- High-density coaxial emitter device for electrospray: pushing the limits of additively manufactured microfluidic devices by SLA/DLP(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2022-06) Lozano Sura, Roberto Carlos; Olvera Trejo, Daniel; emimmayorquin; Escuela de Ingeniería y Ciencias; Campus MonterreyPhotopolymerization-based 3D printing technologies like SLA and DLP offer efficient fabrication of diverse structures, eliminating the requirement for molds or machining. These techniques allow fast fabrication of intricate designs such as microfluidics devices at low cost, however, the accuracy and resolution of microchannels are still challenging to control for very intricate microfluidics. This study focuses on understanding the influence of manufacturing parameters on the quality of microchannels and miniaturization limits by developing a mathematical model to predict mechanical properties depending on the curing times. Also, we study the limits of this technology in terms of the accuracy of microchannels for the fabrication of multiplexed coaxial electrospray sources. We demonstrate the effectiveness of the mathematical model to improve the quality of these devices with diameters of 360 um with 41 unclogged coaxial nozzles in 1 cm2. The contribution of this work also demonstrated incorporating purge channels was essential to clean uncured resin and the proposed procedure to ensure proper cleaning of the device. The devices were electrically characterized via electrospray processes observing uniform array operation depending on the nozzle size.
- Design and simulation of a metal additive manufacturing system by means of diode area melting technique(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2022) Berni Rios, Gerardo; López Botello, Omar Eduardo; dnbsrp; Rodríguez González, Ciro Ángel; Vázquez Lepe, Elisa Virginia; School of Engineering and Sciences; Campus MonterreyMetal additive manufacturing is a field of advanced manufacturing which consists in the building of a component layer by layer based on a 3D digital model. A vast variety of technologies had been researched in different types of additive manufacturing leading to very well standardized and established processes for the industry. Even though metal additive manufacturing presents lots of benefits, there still exists problems to be solved like the residual stresses generated due to the thermal cycle the piece is exposed to during the printing, the low energy absorption efficiency for specific materials, or the long duration of the process compared to a traditional manufacturing process. The work presented in this thesis developed a finite element model for the purpose of investigating the development of the thermal distributions along x-direction and y-direction of stainless steel 316L powder by applying the Diode Area Melting (DAM) technique to a Selective Laser Melting (SLM) additive manufacturing process. ANSYS Mechanical APDL software was utilized in performing coupled thermal-structural field analysis. This work is based on the design and simulation on a metal additive manufacturing system by powder bed fusion based on the technique of Diode Area Melting, which uses an array of multiple low power diode lasers that works at shorter wavelengths as is it accustomed. This approach has the intention of tackling the problems of time production, energy efficiency and residual stresses in the part. A thermal simulation experiment is done in order to determine the best configuration parameters for the powder fusion and the stresses generated by this new printing technique.