5 research outputs found
Modelación de tensiones de contacto originadas en la llanta del secador rotatorio de menas lateríticas
No full textEl propósito de la investigación fue modelar el comportamiento de las tensiones de contacto de naturaleza compresiva y térmica que se originan en las llantas del horno de tambor rotatorio, con el fin de realizar ensayos de fatiga y desgaste superficial en las llantas. Primeramente se estableció un modelo teórico para estimar las tensiones en la llanta. Se discretizó, mediante el software ANSYS v.12.1, un modelo geométrico equivalente de la llanta y de la zona de contacto. Por último, mediante el método de elementos finitos, se simularon los contactos para estimar el comportamiento de las tensiones. Los resultados mostraron que la tensión máxima actúa sobre la línea media de la banda de contacto y su valor es directamente proporcional a la fuerza sobre la llanta y a su temperatura. El valor más elevado de tensión máxima de contacto (415,14 MPa) se observó para 1 254 467 N de fuerza sobre la llanta y temperatura de 100 °C; mientras que el valor más bajo (87,662 MPa) fue para 1 153 915 N y 40 °C
Spectrophotometer and its utilization for the resolution of professional issues encountered by metallurgical ingineers
No full textEl trabajo aborda el estado del arte de las técnicas de análisis espectral, en particular la Espectrofotometría de Absorción Atómica y de Emisión y profundiza en los principios físicos en los cuales se basa esta técnica. Aborda la utilización de la misma en diversos campos de la ciencia y la técnica, en particular su función para resolver problemas profesionales en el campo de la metalurgia. Se realiza un inventario de la utilización de las técnicas de análisis espectral en el Instituto Superior Minero Metalúrgico y se propone un sistema de prácticas de laboratorio que pueden ser realizadas en coordinación con otras empresas del territorioThe state of the art of the techniques of spectral analysis discusses the work, in particular Absorción Atómica's and Emisión's Espectrofotometría, digging into the physical beginnings which he has a base in this technique. Discuss the utilization of the same at various fields of science and the technique, in particular his job to resolve a metallurgic engineer's professional problems of one's own. Finally accomplishes an inventory of the utilization itself of the anvil is techniques at the Institute Superior Minero Metalúrgico's surroundings and it intends a system of practices of laboratory with labor component that they can be accomplished with the visitor to Empresas's laboratories of the territory
ENVIRONMENTAL IMPACT ASSESSMENT USING LIFE-CYCLE ANALYSIS
No full textLife cycle assessment (LCA) is a methodology used in evaluating the impact of environmental factors associated with all stages of a commercial product, process, or service life cycle. This paper sheds light on different techniques and processes and how they are applied during each phase of a product or process, right from the acquisition of raw materials to the end-of-life phase where assets are decommissioned. This project also uses a case study to explore economic and ecological life cycle outcomes as it relates to cost and financial bearin
STRUCTURAL INTEGRITY MONITORING OF OFFSHORE STRUCTURES USING LIQUID PENETRANT TESTING
No full textThe offshore inspection is an integral part of the Oil and Gas industry, due to the structural failures, a huge sum of money and resources have been invested into ensuring that offshore structures are built according to procedures and specifications that will guaranty the integrity and overall reliability for the complete life of the structure which is usually between 25 – 30 years. The complex failure pattern of offshore structure’s means they will be prone to hazards; hence consistent inservice inspection techniques are required to monitor the structural integrity of these structures, and as a result, offshore inspections have developed over the past years with the introduction of Non-Destructive Examination (NDE) inspection techniques such as “LIQUID PENETRANT TESTING”
STRESS-STRENGTH INTERFERENCE ANALYSIS OF AISI 4140 STEEL UNDER CONSTRAINED THERMAL EXPANSION USING MONTE-CARLO SIMULATION
No full textMaterial properties and stresses acting on machine parts are not point values but are statistically distributed. Consequently, it is possible for stress and strength distributions to overlap, exposing weaker materials to stresses greater than their strengths, leading to failure. A Monte Carlo simulation was conducted on AISI 4140 steel subjected to constrained thermal expansion using practical statistical distributions of material properties and environmental variables. The probability of failure of constrained and unstrained AISI 4140 steels were compared and the results showed a lower probability of failure for the latter. The results also showed that at low to moderate stress levels, mechanical load and thermal stress had relatively similar impact on the probability of failure. However, at high stress levels, the effect of mechanical load was predominant
