Open Access Original Research Article

Development of Computer Software for Design of 16+4 Speed Gearbox for Tractor and Practical Validation

P. Mondal, U. D. Bhangale, Dinesh Tyagi

Journal of Advances in Mathematics and Computer Science, Page 1-15
DOI: 10.9734/BJMCS/2011/120

Indian tractor industry is now the largest in the world in number of unit production with an average of more than 2 lakhs unit production per year. Export market of tractor is also increasing on an average 30-40% rate. At present most of the tractor models produced in India has (6+2) or (8+2) speed gear box. But it is already proven that more number of speed options can reduce fuel consumption and can increase possibility of power-load matching. To meet the requirement of market demand and better performance, a new “16 forward + 4 reverse” speed gearbox, is required to be designed and developed. To automate the highly technical and time consuming design procedure, a software has been developed by using Visual Basic 6.0 language. Up-shift analysis is very important for efficient gearbox design. During design up-shift spectrum has been kept as even as possible. Slip torque and duty cycle concepts has been introduced for engineering optimization of the gearbox parameters. Introduction of slip torque and duty cycle concept reduced face width of different gears from 9 to 34 %. Stress analysis shows that in all the cases design bending and contact stress are within 10% than the corresponding induced stress values. With the result of the developed software, a prototype of new gearbox has been developed. Haulage testing was carried out with the new prototype. The new prototype resulted in 8.6 % reduction in total fuel consumption for 10 km run on level road as with the new prototype better matching of load vs. pull was possible.

Open Access Original Research Article

User Interface Design and Usability Testing of a Reinforced Concrete Design (RCD) Beam Interface

L. O. Yusuf, O. Folorunso, A. T. Akinwale, I. A. Adejumobi

Journal of Advances in Mathematics and Computer Science, Page 16-45
DOI: 10.9734/BJMCS/2011/169

This paper describes the design outcomes and user evaluation of a Reinforced Concrete Design (RCD) interface for Beams from a user-centric point of view. The design began with a user interface proposal that was shown to Reinforced Concrete Designers to gather first reactions. Based on feedback the style evolved and eventually interaction diagrams were made to make sure that the functionality was both possible and logical to implement. The interaction diagrams were presented to usability RCD experts to be initially evaluated and commented upon. The design decisions were implemented using Microsoft Visual Studio 2010 and AutoCAD 2010. A prototype was produced to test the theories in practice and to gain information about the RCD users. The implementation itself took advantage of emerging technologies such as WCF which make it possible to use Service Oriented Applications through the web services. A total of twenty-five RCD experts were recruited to perform various tasks on both Structural Analysis and Design (STAAD) Software Product and the prototype RCD applications and rate their experiences. The outcomes of the user-study were positive, with the majority of the users (twenty-two out of twenty-five) preferring the prototyped interface to the existing and fully working solution. This was considered a good result given the qualitative feedback from the users. Some of the findings emphasized the importance of the holistic experience and look-interact-and-feel over a pure set of technical features and merits.