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Copyright of Revista Iberoamericana de Ingeniería Mecánica is the property of Editorial UNED and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This study presents a new methodology for assessing the structure of a ribbon agitator in a double-helix horizontal ribbon blender used for mixing granular jaggery. In this methodology, strain gauges measure local deformations in real time (while jaggery is processed) at different points of the ribbon agitator. Indirectly measuring the stresses on the ribbon agitator allows monitoring the structural condition. The results show that the agitator’s reinforcement reached the desired processing capacity of 3 t/h with a Von Mises equivalent stress of 57.13 MPa, which represents a safety factor of 3.76. It is concluded that the ribbon agitator’s structure is safe, without signs of permanent deformities or failures, ensuring a homogenized and continuous processing of granular jiggery at a rate of 3 t/h without unexpected stops in production. [ABSTRACT FROM AUTHOR]

Copyright of DYNA - Ingeniería e Industria is the property of Publicaciones Dyna SL and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The common way of assessing structural parts of machines, buildings, vehicles, aircraft and other structures is based on the calculation of the strength of materials to external forces. A property representing the resistance of the solid is the mechanical deformation. The recording and analysis of this property to characterize solid materials are very important. This paper exposes the design made of hardware and firmware implementation of a prototype system that aims to measure the mechanical deformation on the surface of a steel beam in bending using metallic strain gauges. In order to reduce measurement errors a new compensation method was implemented via DSSP (Digital Sensor Signal Processor). A mechanical system which is modeled mathematically to tune the designed system was also carried out. From evaluation of prototype performance an error of about 1% over the span of measurement was obtained. [ABSTRACT FROM AUTHOR]

Copyright of Revista Iberoamericana de Ingeniería Mecánica is the property of Editorial UNED and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper is a study of the state of stress-strain Analysis of shredder grinder parallelogram mechanism for Cuban sugar cane harvester CCA-5000. Was used the curve of variation of the extreme loads acting on the shredder, from experimental evaluation of the harvester model KTP-2M with the strain gauge over an obstacle, where dynamic coefficients that occur in the center of mass of this body were determined. Was used the Finite Element Method and through linear dynamic analysis was determined the causes of the plastic deformations appeared in the lower tube of shredder parallelogram mechanism in harvesting testing of the new harvester to be tensions 219.3 MPa in the same, being the elastic limit of the steel used 220 MPa. It checks the amendments made to the structure, giving a safety factor of 1.36 for the new model with a rectangular section lower tube, which ensures a reliable behavior of the same during the occurrence of the extreme loads during machine work. [ABSTRACT FROM AUTHOR]

Copyright of Latin-American Journal of Physics Education is the property of Latin-American Physics Education Network and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Fuentes, El Reventón Energético is the property of Universidad Industrial de Santander and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The stress and deformation analysis in the body of a ball valve of diameter 8", class 600, during the hydrostatic test, using the finite elements method is done. The results are verified through experimental stress analysis method, using strain gauges. For the finite elements method the software Cosmos/M and information obtained during the experimental analysis were used. The experimental tests were carried out in a press type test machine, placing strain gauges in the body of the valve at certain points of interest. The values of deformation obtained allowed validating the application of the finite elements method. [ABSTRACT FROM AUTHOR]

Given their specific use as source of natural insecticides of easy biodegradation, as well as other advantages in the improvement of saline soils, rescue of marginal lands and their exploitation in forestry, agro-forestry and forest, the cultivation of the Nim tree has been worldwide extended in many regions of Asia, África, Australia and Latin America, including Cuba. The harvest of Nim fruits becomes very difficult due to the great tall that reach these trees in a few years, being the mechanical harvest by shaking the main limbs or trunk a possible way of practical solution of this problem. The determination of the physical-mechanical properties of fruit-peduncle system is an indispensable stage during the investigations related with the determination of the parameters of the means for mechanical harvesting of agricultural products. The measurement of the main physical-mechanical properties is made with the aid of strain gages and digital images processing techniques. As a result of the investigation the main statistical indicators of a group of dimensional, inertial and elastic properties of the fruit-peduncle system, related with the mechanical harvest of Nim, were obtained. Also the bending moment, required for fruit detachment, is determined. [ABSTRACT FROM AUTHOR]

The strain gage mensurations are of great utility for the evaluation of any structure, as well as for the energy evaluation of all machinery type or vehicle that it has an energy source and that this wants to be optimized. These mensuration instruments are highly expensive and an alternative to solve its lack can be a system of multichannel mensuration like the exposed one in the following work, where it is used like base a personal microcomputer in a double function, like mensuration instrument and processor of the databases created during the tests. With the use of a AD Converter and a multiplex amplifier card is given answer to multiple problems linked to the design, optimization and operation of structures, agricultural machinery and technological processes that require of this information. [ABSTRACT FROM AUTHOR]

this paper shows a reliability analysis evaluation of the main frames of one of the most important Colombian bridges. The evaluation was carried out by employing the following techniques: geometrical detailing, mechanical tests, traffic counting, load deformation tests, structural calibration of the bridge model, instrumentation, electrical monitoring and numerical simulation. The monitoring procedure was implemented by a series of electronic sensors connected to the main frame bridge structure in multiple locations to measure and record data from the strain gages sensors. The purpose for employing the monitoring procedure described above was to compile real-time data to compare them with the design load (C-40-95) established by the Colombian Seismic Code of Bridges Design. Overloads were found in some of the monitored frames. This fact compromises the bridge's safety and stability and must be controlled immediately. Additionally, probability failure calculations were carried out and the results were that the structure safety ranges that assure stability and a lower risk condition were not found. [ABSTRACT FROM AUTHOR]