International Journal of General Engineering and Technology

1-8

Authors: D. L. Gunapala, O. Gunapala & S. Egodage

This paper is related to the application of finite element analysis to designing a plastic product particular a rim for unitary wheel used with Ground Service Support Equipment such as trolleys, container dollies, luggage trailers. The workwas carried out paying special attention to the optimization of the wheel structural architecture for load bearing capability. Modeling and simulation work was carried out by considering thermoplastic material namely polyamide 6 filled with 30% short glass fibers. The selection of plastic material was based on several factors, including mechanical strength under static and dynamic load, resistance to prolonged action of elevated temperatures, cost and ability to be molded with conventional techniques. A plastic model of the steel rim was developed based on general plastic product design standards. The model was simulated in order to identify areas of possible potential failure. After that model was optimized by changing and rearranging its structural elements for further reduction of stresses in the identified potential failure areas. Final modification of the proposed model was carried out for product mold ability to ensure its manufacture with conventional molding technique. The finite element analysis showed that the stresses generated in the optimized model components were well below the actual yield stress of the plastic. The destructive load ofthe plastic wheel model estimated under static radial load condition with finite element analysis agreed well with the results obtained by physical testing the molded prototype samples under the same loading conditions. This fact affirmed suitability of the Solidwork design and Simulation packages for plastic part design. The application of this techniques lead to the reduction of prolonged product implementation period and significant cost saving due to reduced reproduction number of prototypes to bemade for evaluation of the product suitability, thereby making design successful and efficient.

19-38

Authors: Sundos E. Al-shamaylh, Sultan A. Al-Tarawenh & Salloom A. Al-Juboori

The aim of the study was to identify the value of the thinking Style for brain dominance and the impact of its relationship in making the project management and job preference of the employees of the Arab Potash Company, which were (111) employees chosen for this study. The SPSS (version 16) was used to analyze the data, using different statistical methods (percentages, frequencies, arithmetic mean, standard deviation, chi-square value based on the fit of goodness, ttest, and Pearson correlation coefficient). The main results analysis showed that the prevalence of single dominance among employees was (62.2%), with (28.8%) in type (A) followed by double dominance (32.4%) in the styles of (AB) and, finally the triple dominance (5.4%) specifically in the (ABC) pattern. The statistical analysis showed that the significant differences between the power preference of thinking styles and type of job in type (A), while the absence of differences in the rest of the styles, and the existence of statistically significant differences at the same level type (A) according to the work department. Also a negative correlation between some types of thinking styles pairs that were not favored in the type of such a company. Finally, the results revealed that the possibility of increasing and decreasing the negative correlation between thinking styles in stressful work situations under high pressure. In the light of these results, some important points were recommended for motivating the employees of the potash company to identify the subject of thinking styles to know their strengths and weaknesses in work and the impact on dealing with the rest of the employees and its reflection on the productivity of the company and reducing the conflicts among them, through training courses in order to encourage each employee to increase the use of a quarter of his/her brain in accordance with. Also its required function, also recommended that the Herrmann scale may be used as a tool for recruiting and setting up teams work from the principle of "the right man in the right place" and to renew the HBDI database for employees for each period.