Implementation of a cooling system to develop experimental fatigue tests below zero grades Celsius: Implementación de un sistema de enfriamiento para desarrollar pruebas de fatiga por debajo de cero grados Celsius

Temperature is one of the matter properties with the greatest influence on the materials behavior existing in nature and those man designed. This physical magnitude allows to demonstrate and define behaviors and materials characteristics in the industry in general. Its influence is present in all the places where the materials fulfill functions, however, in some applications its influence is very little, which allows to disregard its effects. In the steels case (one of the most used materials at the industrial level today), the temperature variation produces dilation or contraction, depending on the temperature magnitude and its variation that affects them. Temperature increases generate an expansion phenomenon in the materials, which under load will reach a point where they present thermal fatigue failure. The opposite is that of temperature drops, where the phenomenon that occurs is contraction, often leading to the loss of adjustments and interference that compromise the equipment functionality and integrity. The fatigue failure mentioned is presented as a result of the stresses and deformations present in both cases. It is desired to condition a rotational flex fatigue test equipment with a cooling system to bring the sample material to temperatures below zero degrees Celsius, in order to check how low temperatures, affect the resistance of steel to fatigue. For this, a cooling system was designed and the fatigue equipment was adapted to reduce heat transfer. After carrying out this implementation and determining that the sizes of the devices were suitable for the proposed purposes, the initial temperature tests were carried out and, once this part was achieved, three repetitions of a rotary fatigue test were performed that demonstrated that the equipment can operate normally.La temperatura es una de las propiedades de la materia con mayor influencia en el comportamiento de los materiales existentes en la naturaleza y aquellos diseñados por el hombre. Esta magnitud física permite demostrar y definir comportamientos y características de los materiales en la industria en general. Su influencia está presente en todos los lugares donde los materiales cumplen funciones, sin embargo, en algunas aplicaciones su influencia es muy pequeña, lo que permite ignorar sus efectos. En el caso de los aceros (uno de los materiales más utilizados a nivel industrial en la actualidad), la variación de temperatura produce dilatación o contracción, dependiendo de la magnitud de la temperatura y la variación que los afecta. Los aumentos de temperatura generan un fenómeno de expansión en los materiales, que bajo carga alcanzarán un punto donde presentan fallas por fatiga térmica. Lo opuesto es el de las caídas de temperatura, donde el fenómeno que ocurre es la contracción, que a menudo conduce a la pérdida de ajustes e interferencias que comprometen la funcionalidad e integridad del equipo. La falla por fatiga mencionada se presenta como resultado de las tensiones y deformaciones presentes en ambos casos. Se desea acondicionar un equipo de ensayo de fatiga por flexión rotativa con un sistema de enfriamiento para llevar el material de la muestra a temperaturas inferiores a cero grados Celsius, a fin de verificar cómo las bajas temperaturas afectan la resistencia del acero a fatiga. Para esto, se diseñó un sistema de enfriamiento y el equipo de fatiga se adaptó para reducir la transferencia de calor. Después de llevar a cabo esta implementación y determinar que los tamaños de los dispositivos eran adecuados para los propósitos propuestos, se realizaron las pruebas de temperatura iniciales y, una vez que se logró esta parte, se realizaron tres repeticiones de una prueba de fatiga rotativa que demostraron que el equipo puede operar normalmente

Implementation of a cooling system to develop experimental fatigue tests below zero grades Celsius: Implementación de un sistema de enfriamiento para desarrollar pruebas de fatiga por debajo de cero grados Celsius

Temperature is one of the matter properties with the greatest influence on the materials behavior existing in nature and those man designed. This physical magnitude allows to demonstrate and define behaviors and materials characteristics in the industry in general. Its influence is present in all the places where the materials fulfill functions, however, in some applications its influence is very little, which allows to disregard its effects. In the steels case (one of the most used materials at the industrial level today), the temperature variation produces dilation or contraction, depending on the temperature magnitude and its variation that affects them. Temperature increases generate an expansion phenomenon in the materials, which under load will reach a point where they present thermal fatigue failure. The opposite is that of temperature drops, where the phenomenon that occurs is contraction, often leading to the loss of adjustments and interference that compromise the equipment functionality and integrity. The fatigue failure mentioned is presented as a result of the stresses and deformations present in both cases. It is desired to condition a rotational flex fatigue test equipment with a cooling system to bring the sample material to temperatures below zero degrees Celsius, in order to check how low temperatures, affect the resistance of steel to fatigue. For this, a cooling system was designed and the fatigue equipment was adapted to reduce heat transfer. After carrying out this implementation and determining that the sizes of the devices were suitable for the proposed purposes, the initial temperature tests were carried out and, once this part was achieved, three repetitions of a rotary fatigue test were performed that demonstrated that the equipment can operate normally.La temperatura es una de las propiedades de la materia con mayor influencia en el comportamiento de los materiales existentes en la naturaleza y aquellos diseñados por el hombre. Esta magnitud física permite demostrar y definir comportamientos y características de los materiales en la industria en general. Su influencia está presente en todos los lugares donde los materiales cumplen funciones, sin embargo, en algunas aplicaciones su influencia es muy pequeña, lo que permite ignorar sus efectos. En el caso de los aceros (uno de los materiales más utilizados a nivel industrial en la actualidad), la variación de temperatura produce dilatación o contracción, dependiendo de la magnitud de la temperatura y la variación que los afecta. Los aumentos de temperatura generan un fenómeno de expansión en los materiales, que bajo carga alcanzarán un punto donde presentan fallas por fatiga térmica. Lo opuesto es el de las caídas de temperatura, donde el fenómeno que ocurre es la contracción, que a menudo conduce a la pérdida de ajustes e interferencias que comprometen la funcionalidad e integridad del equipo. La falla por fatiga mencionada se presenta como resultado de las tensiones y deformaciones presentes en ambos casos. Se desea acondicionar un equipo de ensayo de fatiga por flexión rotativa con un sistema de enfriamiento para llevar el material de la muestra a temperaturas inferiores a cero grados Celsius, a fin de verificar cómo las bajas temperaturas afectan la resistencia del acero a fatiga. Para esto, se diseñó un sistema de enfriamiento y el equipo de fatiga se adaptó para reducir la transferencia de calor. Después de llevar a cabo esta implementación y determinar que los tamaños de los dispositivos eran adecuados para los propósitos propuestos, se realizaron las pruebas de temperatura iniciales y, una vez que se logró esta parte, se realizaron tres repeticiones de una prueba de fatiga rotativa que demostraron que el equipo puede operar normalmente

Detection of structural alterations in metal bodies: An approximation using Fourier transform and principal component analysis (PCA)

In this theme some advances have been developed, verified in the background, where attempts have been made to determine the existence of structural alterations such as perforations, defective welding and dents in metal structures; a pattern of mechanical vibration that allows to differentiate each alteration has not yet been clearly defined. In this work, the data taking was carried out taking into account the position of the sensors, two beams were added without alteration, in order to be able to interact with the five configurations, which were adopted for the experimental design.  To the tests of repeated measurements, in each configuration, analysis (ANOVA) was used for the validation of NULL hypotheses, and thus to determine the number of test to be treated. After having the defined matrices representing each configuration, in each anomaly, it is necessary to apply the principal component Analysis (PCA), to the data obtained by the calculation of the fast Fourier transform (FFT). And thus determine the number of components by means of three Criteria (Jollife, Kaiser and PVA), using a classification algorithm, which evaluates the percentage of classification vs lower standard deviation. In this analysis the descriptors were not calculated but the main components of each criterion were taken as a description tool.  The process of extraction of characteristics was fundamental to determine the proper configuration in each alteration (fissure, welded, perforated, deformed).  On the other hand, statistical parameters were calculated (average, standard deviation, variation factor, Euclidean distance) of each anomaly. Taking as descriptors.&nbsp

Detection of structural alterations in metal bodies: An approximation using Fourier transform and principal component analysis (PCA)

In this theme some advances have been developed, verified in the background, where attempts have been made to determine the existence of structural alterations such as perforations, defective welding and dents in metal structures; a pattern of mechanical vibration that allows to differentiate each alteration has not yet been clearly defined. In this work, the data taking was carried out taking into account the position of the sensors, two beams were added without alteration, in order to be able to interact with the five configurations, which were adopted for the experimental design.  To the tests of repeated measurements, in each configuration, analysis (ANOVA) was used for the validation of NULL hypotheses, and thus to determine the number of test to be treated. After having the defined matrices representing each configuration, in each anomaly, it is necessary to apply the principal component Analysis (PCA), to the data obtained by the calculation of the fast Fourier transform (FFT). And thus determine the number of components by means of three Criteria (Jollife, Kaiser and PVA), using a classification algorithm, which evaluates the percentage of classification vs lower standard deviation. In this analysis the descriptors were not calculated but the main components of each criterion were taken as a description tool.  The process of extraction of characteristics was fundamental to determine the proper configuration in each alteration (fissure, welded, perforated, deformed).  On the other hand, statistical parameters were calculated (average, standard deviation, variation factor, Euclidean distance) of each anomaly. Taking as descriptors.&nbsp

The Research Journey as a Challenge Towards New Trends

The academic community of the department of Risaralda, in its permanent interest in evidencing the results of the research processes that are carried out from the Higher Education Institutions and as a product of the VI meeting of researchers of the department of Risaralda held in November 2021 presents its work: “The journey of research as a challenge towards new trends”, which reflects the result of the latest research and advances in different lines of knowledge in Agricultural Sciences, Health Sciences, Social Sciences and Technology and Information Sciences, which seek to solve and meet the demands of the different sectors. This work would not have been possible without the help of each of the teachers, researchers and authors who presented their articles that make up each of the chapters of the book, to them our gratitude for their commitment, dedication and commitment, since their sole purpose is to contribute from the academy and science to scientific and technological development in the search for the solution of problems and thus contribute to transform the reality of our society and communities. We also wish to extend our gratitude to the institutions of the Network that made this publication possible: UTP, UCP, UNAD, UNIREMINGTON; UNISARC, CIAF, Universidad Libre, Uniclaretiana, Fundación Universitaria Comfamiliar and UNIMINUTO, institutions that in one way or another allowed this work to become a reality, which we hope will be of interest to you.Preface............................................................................................................................7 Chapter 1. Technologies and Engineering Towards a humanization in Engineering using soft skills in training in Engineers.............................................................................................................11 Omar Iván Trejos Buriticá1, Luis Eduardo Muñoz Guerrero Innovative materials in construction: review from a bibliometric analysis....................................................................................................................27 Cristian Osorio Gómez, Daniel Aristizábal Torres, Alejandro Alzate Buitrago, Cristhian Camilo Amariles López Bibliometric review of disaster risk management: progress, trends, and challenges.........................................................................................................51 Alejandro Alzate Buitrago, Gloria Milena Molina Vinasco. Incidence of land coverage and geology, in the unstability of lands of the micro-basin of the Combia creek, Pereira, Risaralda....................................73 Alejandro Alzate Buitrago, Daniel Aristizábal Torres. Chapter 2. Arts, Humanities, and Social Sciences Training experience with teachers teaching mathematics using the inquiry methodology ...............................................................................................95 Vivian Libeth Uzuriaga López, Héctor Gerardo Sánchez Bedoya. Interpretation of the multiple representations of the fears associated to the boarding of limited visual patients in the elective I students’ written productions and low vision ...................................................................................113 Eliana Bermúdez Cardona, Ana María Agudelo Guevara, Caterine Villamarín Acosta. The relevance of local knowledge in social sciences............................................131 Alberto Antonio Berón Ospina, Isabel Cristina Castillo Quintero. Basic education students’ conceptions of conflict a view from the peace for the education....................................................................................................143 Astrid Milena Calderón Cárdenas,Carolina Aguirre Arias, Carolina Franco Ossa, Martha Cecilia Gutiérrez Giraldo, Orfa Buitrago. Comprehensive risk prevention in educational settings: an interdisciplinary and socio-educational approach ............................................................................163 Olga María Henao Trujillo, Claudia María López Ortiz. Chapter 3. Natural and Agricultural Sciences Physicochemical characterization of three substrates used in the deep bedding system in swine .......................................................................................175 Juan Manuel Sánchez Rubio, Andrés Felipe Arias Roldan, Jesús Arturo Rincón Sanz, Jaime Andrés Betancourt Vásquez. Periodic solutions in AFM models........................................................................187 Daniel Cortés Zapata, Alexander Gutiérrez Gutiérrez. Phenology in flower and fruit of Rubus glaucus benth. Cv. Thornless in Risaralda: elements for phytosanitary management .........................................199 Shirley Palacios Castro, Andrés Alfonso Patiño Martínez, James Montoya Lerma, Ricardo Flórez, Harry Josué Pérez. Socio-economic and technical characterization of the cultivation of avocado (Persea americana) in Risaralda..............................................................217 Andrés Alfonso Patiño Martínez, Kelly Saudith Castañez Poveda, Eliana Gómez Correa. Biosecurity management in backyard systems in Santa Rosa de Cabal, Risaralda................................................................................................................227 Julia Victoria Arredondo Botero, Jaiver Estiben Ocampo Jaramillo, Juan Sebastián Mera Vallejo, Álvaro de Jesús Aranzazu Hernández. CONTENTS Physical-chemical diagnosis of soils in hillside areas with predominance of Lulo CV. La Selva production system in the department of Risaralda.............241 Adriana Patricia Restrepo Gallón, María Paula Landinez Montes, Jimena Tobón López. Digestibility of three concentrates used in canine feeding....................................271 María Fernanda Mejía Silva, Valentina Noreña Sánchez, Gastón Adolfo Castaño Jiménez. Chapter 4. Economic, Administrative, and Accounting Sciences Financial inclusion in households from socioeconomic strata 1 and 2 in the city of Pereira ..................................................................................................285 Lindy Neth Perea Mosquera, Marlen Isabel Redondo Ramírez, Angélica Viviana Morales. Internal marketing strategies as a competitive advantage for the company Mobilautos SAS de Dosquebradas........................................................................303 Inés Montoya Sánchez, Sandra Patricia Viana Bolaños, Ana María Barrera Rodríguez. Uses of tourist marketing in the tourist sector of the municipality of Belén de Umbría, Risaralda.............................................................................................319 Ana María Barrera Rodríguez, Paola Andrea Echeverri Gutiérrez, María Camila Parra Buitrago, Paola Andrea Martín Muñoz, Angy Paola Ángel Vélez, Luisa Natalia Trejos Ospina. Territorial prospective of Risaralda department (Colombia), based on the SDGS...............................................................................................................333 Juan Guillermo Gil García, Samanta Londoño Velásquez. Chapter 5. Health and Sports Sciences Performance evaluation in times of pandemic. What do medical students think?.......................................................................................................353 Samuel Eduardo Trujillo Henao, Rodolfo A. Cabrales Vega, Germán Alberto Moreno Gómez. The relevance of the therapist’s self and self-reference in the training of psychologists.....................................................................................................371 Maria Paula Marmolejo Lozano, Mireya Ospina Botero. Habits related to oral health which influence lifestyle of elder people in a wellness center for the elderly in Pereira 2020. .............................................387 Isadora Blanco Pérez, Olga Patricia Ramírez Rodríguez, Ángela María Rincón Hurtado. Analysis of the suicide trend in the Coffee Region in Colombia during the years 2012-2018 ..............................................................................................405 Germán Alberto Moreno Gómez, Jennifer Nessim Salazar, Jairo Franco Londoño, Juan Carlos Medina Osorio. Hind limb long bone fractures in canines and felines...........................................419 María Camila Cruz Vélez, Valentina Herrera Morales, Alba Nydia Restrepo Jiménez, Lina Marcela Palomino, Gabriel Rodolfo Izquierdo Bravo. Prevalence of overweight and obesity in children in the rural and urban area of Risaralda....................................................................................................439 Angela María Álvarez López, Angela Liceth Pérez Rendón, Alejandro Gómez Rodas, Luis Enrique Isaza Velásquez. Chapter 6. Architecture, Design and Advertising The artisan crafts of Risaralda, characteristics, importance, and risks within the Colombian Coffee Cultural Landscape, CCCL....................................457 Yaffa Nahir Ivette Gómez Barrera, Javier Alfonso López Morales

Estrategia Didáctica para el Acompañamiento de la Asignatura Dinámica

Este proyecto fue realizado por un ingeniero Mecánico, estudiante de Cuarto semestre de Maestría en Educación de la II Cohorte, como trabajo de grado para obtener el título de Magister en Educación; se desarrolló con estudiantes de séptimo semestre de Electromecánica de las Unidades Tecnológicas de Santander UTS, de Bucaramanga; se diseñó una estrategia didáctica con el objetivo de mejorar el aprendizaje de la asignatura de Dinámica, previo diagnóstico, a través de experiencias de fenómenos físicos reproducidos en el aula, fundamentada en el constructivismo y la teoría del tricerebral impulsada por de Gregori (1984).El presente trabajo se realiza en el escenario de las Unidades Tecnológicas de Santander, donde se identifica una problemática en la asignatura Dinámica, tema de la disciplina de la Física. Debido a la complejidad de la asignatura y a la dificultad que tienen los estudiantes para resolver problemas e identificar las variables, se presenta inconveniente para aprobar el curso. Se indagó sobre el problema de forma documental y se realizó un diagnóstico mediante test y encuestas; con base en ellos se planteó una estrategia didáctica para aplicar en el aula de clase, apoyada en la teoría cognoscitiva que involucra el constructivismo y el aprendizaje significativo, para que los estudiantes tengan la oportunidad de observar de manera directa algunos fenómenos físicos y relacionen las variables que afectan el [email protected]

Comportamiento de la Resistencia al desgaste erosivo de recubrimientos de alúmina

This article presents the results of the research related to the experimental behavior of alumina coatings obtained from micrometric size particles and deposited through a thermal spraying by flame process on an AISI 304 stainless steel substrate when it is subjected to erosive wear caused by cavitation through a vibratory apparatus. The methodology used to reach the proposed objective consisted of five phases in the first a morphological and chemical characterization of the materials used, was carried out; the second was the adaptation of UIP1000hd ultrasound equipment to the requirements demanded by the ASTM G32-16 standard (standard test method for erosion by cavitation using vibrating apparatus); afterwards, test pieces of AISI 304 stainless steel were tested to verify the performance of the equipment used, the validation of the wear phenomenon present in the specimens was carried out through scanning electron microscopy tests in order to observe the evolution of the footprint left over the specimen; as a fourth phase, the deposition of the alumina coatings was carried out through a conventional oxyacetylene combustion equipment and an Eutalloy 85 BX gun; finally micro-hardness and erosive wear resistance tests were carried out on AISI 304 stainless steel specimens without and with alumina coatings. The results obtained allowed to validate the operation of the adapted equipment for the performance of the tests since the percentage of average error between the experimental and theoretical data was of 4,5% for AISI 304 stainless steel; regarding the behavior of alumina coatings a 26,23% reduction of material loss was obtained with respect to the AISI 304 stainless steel which represents a significant improvement and encourages its use when mechanical elements are subjected to erosive wear caused by cavitation. Este artigo apresenta os resultados da pesquisa relacionada ao comportamento experimental de revestimentos de alumina, obtidos a partir de partículas micrométricas e depositados através de um processo de chama térmica, sobre um substrato de aço inoxidável AISI 304, quando submetido a erosão erosiva causada por cavitação através de um aparelho vibratório. A metodologia utilizada para atingir o objetivo proposto consistiu de cinco fases, sendo que na primeira foi realizada uma caracterização morfológica e química dos materiais utilizados; o segundo foi a adaptação do equipamento de ultra-som UIP1000hd aos requisitos exigidos pela norma ASTM G32-16 (método de teste padrão para erosão por cavitação utilizando aparelhos vibratórios); subsequentemente, eles espécimes aço inoxidável AISI 304 foram testadas para a operação do equipamento utilizado, a validação de fenómeno de desgaste presente nas amostras foi realizada por meio de testes de microscopia electrónica de varrimento a fim de observar a evolução da marca deixada sobre o espécime; como uma quarta fase, a deposição dos revestimentos de alumina foi realizada através de equipamento de combustão de oxiacetileno convencional e uma pistola Eutalloy 85 BX; Finalmente, testes de microdureza e resistência à erosão foram realizados em amostras de aço inoxidável AISI 304 sem e com revestimentos de alumina. Os resultados obtidos permitiram validar a operação do equipamento adaptado para a realização dos ensaios, uma vez que a porcentagem de erro médio entre os dados experimentais e teóricos foi de 4,5% para o aço inoxidável AISI 304; sobre o comportamento dos revestimentos de alumina redução de 26,23% de perda de material em comparação com o aço inoxidável AISI 304 foi obtido, o que representa uma melhoria significativa e encoraja a utilização quando os elementos mecânicos são submetidos a erosiva desgaste causado pela cavitação En este artículo se presentan los resultados de la investigación relacionada con el comportamiento experimental de recubrimientos de alúmina, obtenidos a partir de partículas de tamaño micrométrico y depositadas a través de un proceso de rociado térmico por llama, sobre un sustrato de acero inoxidable AISI 304, cuando están sometidos a desgate erosivo originado por cavitación a través de un aparato vibratorio. La metodología utilizada para alcanzar el objetivo propuesto consistió de cinco fases, en la primera se realizó una caracterización morfológica y química de los materiales utilizados; la segunda fue la adaptación del equipo de ultrasonido UIP1000hd a los requerimientos exigidos por la norma ASTM G32-16 (Método de pruebas estándar para erosión por cavitación usando aparatos vibratorios); posteriormente se ensayaron probetas de acero inoxidable AISI 304 para comprobar el funcionamiento del equipo utilizado, la validación del fenómeno de desgaste presente en las probetas se realizó a través de ensayos de microscopia electrónica de barrido con el fin de observar la evolución de la huella dejada sobre el espécimen; como cuarta fase se realizó la deposición de los recubrimientos de alúmina a través de un equipo de combustión oxiacetilénica convencional y una pistola Eutalloy 85 BX; por último se realizaron ensayos de microdureza y resistencia al desgaste erosivo a probetas de acero inoxidable AISI 304 sin y con recubrimientos de alúmina. Los resultados obtenidos permitieron validar el funcionamiento del equipo adaptado para la realización de los ensayos ya que el porcentaje de error promedio entre los datos experimentales y teóricos fue del 4,5% para el acero inoxidable AISI 304; respecto al comportamiento de los recubrimientos de alúmina se obtuvo una reducción del 26,23% de pérdida de material con respecto al acero inoxidable AISI 304, lo que representa una mejora significativa e incentiva su utilización cuando se tienen elementos mecánicos sometidos a desgaste erosivo originado por cavitación.

Implementation of a cooling system to develop experimental fatigue tests below zero grades Celsius

Temperature is one of the matter properties with the greatest influence on the materials behavior existing in nature and those man designed. This physical magnitude allows to demonstrate and define behaviors and materials characteristics in the industry in general. Its influence is present in all the places where the materials fulfill functions, however, in some applications its influence is very little, which allows to disregard its effects. In the steels case (one of the most used materials at the industrial level today), the temperature variation produces dilation or contraction, depending on the temperature magnitude and its variation that affects them. Temperature increases generate an expansion phenomenon in the materials, which under load will reach a point where they present thermal fatigue failure. The opposite is that of temperature drops, where the phenomenon that occurs is contraction, often leading to the loss of adjustments and interference that compromise the equipment functionality and integrity. The fatigue failure mentioned is presented as a result of the stresses and deformations present in both cases. It is desired to condition a rotational flex fatigue test equipment with a cooling system to bring the sample material to temperatures below zero degrees Celsius, in order to check how low temperatures, affect the resistance of steel to fatigue. For this, a cooling system was designed and the fatigue equipment was adapted to reduce heat transfer. After carrying out this implementation and determining that the sizes of the devices were suitable for the proposed purposes, the initial temperature tests were carried out and, once this part was achieved, three repetitions of a rotary fatigue test were performed that demonstrated that the equipment can operate normally.La temperatura es una de las propiedades de la materia con mayor influencia en el comportamiento de los materiales existentes en la naturaleza y aquellos diseñados por el hombre. Esta magnitud física permite demostrar y definir comportamientos y características de los materiales en la industria en general. Su influencia está presente en todos los lugares donde los materiales cumplen funciones, sin embargo, en algunas aplicaciones su influencia es muy pequeña, lo que permite ignorar sus efectos. En el caso de los aceros (uno de los materiales más utilizados a nivel industrial en la actualidad), la variación de temperatura produce dilatación o contracción, dependiendo de la magnitud de la temperatura y la variación que los afecta. Los aumentos de temperatura generan un fenómeno de expansión en los materiales, que bajo carga alcanzarán un punto donde presentan fallas por fatiga térmica. Lo opuesto es el de las caídas de temperatura, donde el fenómeno que ocurre es la contracción, que a menudo conduce a la pérdida de ajustes e interferencias que comprometen la funcionalidad e integridad del equipo. La falla por fatiga mencionada se presenta como resultado de las tensiones y deformaciones presentes en ambos casos. Se desea acondicionar un equipo de ensayo de fatiga por flexión rotativa con un sistema de enfriamiento para llevar el material de la muestra a temperaturas inferiores a cero grados Celsius, a fin de verificar cómo las bajas temperaturas afectan la resistencia del acero a fatiga. Para esto, se diseñó un sistema de enfriamiento y el equipo de fatiga se adaptó para reducir la transferencia de calor. Después de llevar a cabo esta implementación y determinar que los tamaños de los dispositivos eran adecuados para los propósitos propuestos, se realizaron las pruebas de temperatura iniciales y, una vez que se logró esta parte, se realizaron tres repeticiones de una prueba de fatiga rotativa que demostraron que el equipo puede operar normalmente