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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- Semiresorbable orthopedic implant design based on nitinol and magnesium alloy(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2024-12) Grijalva Pazos, Héctor Jesús; Rodríguez Gonzalez, Ciro Ángel; emipsanchez; Cedeño Viveros, Luis Daniel; School of Engineering and Sciences; Campus Monterrey; García López, ErikaThis project focuses on developing and evaluating a novel orthopedic implantprototype, which combines magnesium-calcium and nitinol through a micro laser welding process. The primary objective is to create a biocompatible, biodegradable scaffold for orthopedic applications, offering an alternative to traditional implants. A series of welding experiments were conducted using a PRECO laser welding machine, where different welding parameters, including laser power and exposure time, were tested to optimize the microhardness and mechanical properties of the welds. The simulation and experimental results were compared to validate the design choices and ensure the scaffold's structural integrity. The microhardness tests indicated that the best results were achieved with 200 watts of power and 18 ms exposure time, creating a prototype scaffold for further testing. Future work includes optimizing scaffold designs and conducting compression and degradation tests to evaluate the implant's mechanical performance and corrosion resistance in physiological conditions. This project aims to contribute to developing advanced, sustainable orthopedic implants with improved performance and biocompatibility.
- Structural fatigue life calculation methodology for random loading(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2021-11-25) Miramontes Estrada, Jesús Orlando; Cardenas Fuentes, Diego Ernesto; puemcuervo/tolmquevedo; Delgado Gutierrez, Arturo Javier; School of Engineering and Sciences; Campus Monterrey; Probst Oleszewski, Oliver MatthiasFatigue life calculation has become a mandatory step while designing structural components in any type of industry. Some of the loading conditions for these components have a random behavior to some extent, and even though a simplifi cation to static loads is not the most accurate way, it is one of the most used methodologies given the direct application of the fatigue theories and the knowledge and experience of the engineers. There are a couple of reported approaches to consider the randomness of the load and come up with an expected value for fatigue life, such as Steinberg, Lalanne, Tunna, Dirlik, etcetera; however, these procedures are not familiar and straightforward for most of the structural engineers in the industry. There are commercial software packages available that can help close the knowledge gap, but those are expensive and require additional training for the engineers. This thesis work defi nes a straightforward methodology and develop a cost and training free application that considers load randomness to calculate fatigue life for structural components. To achieve this, a review of the available approaches was done, and by selecting the most recommended techniques throughout literature, an application was developed in Matlab to perform all the necessary calculations, whose GUI is simple enough to be included as part of the virtual validation procedures. With this methodology and application, calculating fatigue life for random loading conditions is simpli fied, making it available for every engineer nevertheless of their fatigue experience and knowledge. This document guides the reader through a general understanding on what is a random load, the mathematical and physical concepts on the fields of mechanical vibrations and fatigue theory necessary to understand random vibration and how it connects with fatigue, a proposed methodology with a series of steps to follow to calculate random loading fatigue, and finally a demonstration of the methodology applied to a specimen and how the calculations correlate successfully with testing.
