Forklifts are prone to accidents due to loss of stability. The objective this research was to evaluate the stability of the MCD25 forklift in compliance with the ISO 22915 Industrial trucks - Verification stability standard. As an alternative to experimental tests, multibody dynamic simulation was performed, with the objective of: obtaining and verifying a model to evaluate the...
In this work, it is made a study for the definition of maintenance tasks in recently designed and manufactured equipment. It is focused in an upper limb exoskeleton designed and built in Cuba for the physiotherapeutic treatment of painful shoulder in hemiplegic patients and adhesive capsulitis. Being the only equipment of its kind in the country and the scarce literature on the...
Was analyzed the behavior the ballistics effects on shielded structures formed by alumina ceramic tiles CC-01 with back squab an aluminum plate AA 6061 and a witness plate aluminum AA 1065. The structures were tested with real shot and with the realization computational simulations from the selection the constitutive models Johnson - Cook and Johnson - Holmquist; as well as the...
In the research a methodology to evaluate Human Reliability during aircraft’s maintenance using a mathematical model to quantify human error probability in a complex technical system is described. The proposal includes three stages and is based on the principles of Technology for the Ergonomic Treatment of Human Error, combined with the Technique for Human Error Rate Prediction...
The paper presents the modeling of a data sample for the joint analysis of symptom variables in 100 MW steam turbines. The main objective is to obtain a pattern data sample representing the normal variability of the turbine's dynamic mechanical behavior. The preprocessing and processing of the database are detailed, which had not been previously documented in the literature for...
The objective the work was to determine the microstructures at the interface and mechanical properties of an explosion welding AISI 304 stainless steel and AISI 1010 carbon steel. For the drawing forming process and the dissimilar welding of the spherical cap, a stamp was used, where after forming, the edge and its curvature were selected as the analysis area. With SOLIDWORD...
Austenitic stainless steels have a wide field of applications, highlighting the field of biomechanics and in particular, in the manufacture of different prosthetic cutting elements, which require a high surface quality to complete their service assignment, in particular resistance to corrosion and its aseptic characteristics. The objective of the work is to obtain the best...
Identifying critical assets is crucial for effective maintenance management. The scientific literature offers various methods, models, and criteria to evaluate asset criticality and importance. This research aims to systematically review the scientific literature on criticality analysis models and methods, providing an updated and reliable guide on relevant criteria to consider...
Mechanical fatigue is a permanent object of study for engineers and researchers interested in the behavior of materials. The objective of this work was to formulate a new definition for mechanical fatigue. A procedure was proposed that is based on the literature review, from which a binary matrix was developed with 37 definitions of fatigue and 49 factors treated in them. With...
The aim of the work presented was the design of a metal mould for gravity die casting to obtain brake and clutch handles of aluminium alloys for Suzuki AX-100 motorbike. The maximum stresses to which the part is subjected were determined and evaluated by the finite element method, considering the composition of the existing raw materials, highlighting that the part obtained meets...
The objective of the work was to determine the metallurgical components of the HK 40 alloy used in sweeping arm teeth after the casting process. Nine teeth were selected, which were cut into different parts according to their geometric shape, of which three had their microstructural behavior, grain size, percentage of carbides, hardness and porosity carried out. It was determined...
The present work consists of proposing a new design of balloon-expandable aortic valve stent for use in patients with aortic valve stenosis. Finite element simulations were carried out to determine the Von Mises stresses and deformations and thereby select the design parameters of this device, which will allow its manufacturing and proper operation. The symmetrical condition of...
The use of polylactic acid scaffolds has been gaining ground in bone regeneration due to its ability to biodegrade. However, its use in clinical practice is limited, among other aspects, by its low bioactivity. The objective of this work is to evaluate two schemes for the deposition of calcium phosphate coatings on polylactic acid scaffolds made by the Fused Deposition Modeling...
The structural integrity is generally given by the mechanical behavior of the joints, and among these are the welded joints. During service, variable loads may appear over time, so it is necessary to know data to predict the fatigue failure of welds. This article aims to determine the S-N curve of an AISI 1015 steel butt-welded joint, manufactured by the flux-cored arc welding...
The tuna industry plays a fundamental role in the development and sustainability of Ecuador's economy. Sustainability has become a topic of great importance; therefore, the main objective of this research was to evaluate the level of performance of preventive sustainable maintenance, in tuna canning companies, based on its influence on the three pillars of the sustainability...
One of the quality tools used to determine if a process is capable of meeting the desired technical specifications is the capability analysis, which constitutes one of the premises to guarantee the quality of products. For this reason, the present work aims to implement the process capability analysis in the gauge manufacturing. To carry out the evaluation, a complex or...
Analytical determination of stress distribution in a backing plate of a diaphragm pump, has a high complexity level, due not only to its geometric characteristics but also to the acting loads. In this work, the finite element method was used to carry out a simulation at this problem, allowing to obtain a solution that, although approximate, is accurate enough for being used for...
The research was carried out based on participatory observation of lubrication actions in different organizations. The evaluation carried out on lubrication and lubricant management identified a set of deficiencies. It was considered that having a model to guide lubrication management is useful to guarantee the continuous improvement of this activity. The objective was to design...
This work aimed at the design of a statistical model based in the technique of principal component analysis (PCA) like method for the reduction of dimensionality and like road to identify the parameter that they have bigger influence in electric generation's variability of the mechanical dynamic functional behavior of 100 MW's steam turbines of potency. Measurable symptoms...
In this work an evaluation of a steam condenser was carried out; considered one of the important equipment within a thermoelectric power plant. In order to carry out this thermal evaluation, the methodology based on the standard for surface steam condensers of the Heat Exchange Institute, Standard for Steam Surface Condenser, was applied. Which allows to obtain comparisons of the...
The objective was to characterize the microstructure, hardness and stresses by X-ray diffraction of a white cast iron the ASTM A 532 class III type A type national manufacture used in the manufacture of centrifugal pump volute for the transport of lateritic pulp. For the characterization of these properties, three raw test tubes were selected. It was determined that this type of...
An experimental investigation was carried out to determine the influence of misalignment on the functional dynamic parameters of a 250 kW DC motor in a steel plant. The objective was to determine the most sensitive online symptom parameters to the alignment condition of the 250 kW GH280 PK DC motor of a steel plant. To do this, it was necessary to obtain a mathematical model that...
Knowing the right moment when an asset must be replaced is highly relevant to the economic efficiency of any industry. The main objective of this work was to determine the opportune moment to replace an asset, based on an economic approach, which allowed making the best decision between continuing to operate the asset and carrying out the corresponding maintenance actions, or...
In this work, I discuss how to ameliorate the detrimental consequences of the intermetallic phase (β-AlFeSi), which forms with iron in Aluminium Silicon (Al-Si) alloys for diesel engine pistons. The essential objective was to obtain a complex aluminium pre-alloy and subsequently the corresponding alloy for pistons, by developing a melting technology using pure Aluminium (Al) and...
The inverted classroom or Flipped classroom is a methodology that allows the student to obtain information in a time and place that does not require the presence of the teacher, thus changing their traditional roles. The objective was to evaluate the impact of the implementation of the Flipped classroom as a teaching method for cognitive development in topic 3 of the chemical...