Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : analysis


On the use of GIS Technique to Analyze the Distribution of Primary Schools in Holy Karbala City

Noor Hashim Hameed

Engineering and Technology Journal, 2016, Volume 34, Issue 15, Pages 2816-2827

This paper analyzes the spatial distribution of primary schools in Karbala city based on geographic information system (GIS). GIS has the ability to solve numerous geographic problems effectively and easily and to make spatial analysis in combination with database systems. In this paper, data of educational facilities and population are collected via comprehensive statistics in Karbala city. This data has been utilized to build a geo data base for study area after processing it. Statistical and spatial analyses were applied. The analysis tools in Arc GIS9.3 software include (standard distance, directional distribution, nearest neighbor, auto correlation and accessibility indicator). These tools were used for analyzing patterns of distribution. Statically analysis results showed that there is an argent need to 31 boys’ primary schools and 30 girl’s primary schools within study area while spatially analysis results showed that nearest neighbor value of 1.19 which is dispersed for boys’ schools and 0.96 is random for girls’ schools. The correlations indicated 0.19 which is random for boys and girls schools. The Calculate Accessibility Indicator’s results showed there is a lack in achieving the Accessibility Indicator of most of the residential sectors.

Strain Behavior at Crack Tip in Thin Plate Using Numerical and Experimental Work

Bassam Ali Ahmed; Fathi A.Alshamma

Engineering and Technology Journal, 2016, Volume 34, Issue 3, Pages 513-526

In this work, strains were studied and analyzed in a thin flat plate with a surface crack at the center, subjected to cycling of low velocity impact loading for two types of aluminum plates (2024, 6061). Experimental and numerical methods were implemented to achieve this research. Two cases of boundary conditions were used in this study; clamped-clamped with simply supported at the other edges, and clamped-clamped with free at the other edges. Numerical analysis using program (ANSYS11-APDL) based on finite element method used to analyze the strains with respect to time at crack tip. In the experimental work, a rig was designed and manufactured for cyclic impact loading on the cracked specimens. The grid points was screened in front of the crack tip to measure the elastic-plastic displacements in the x and y directions by grid method, from which the strains are calculated. The results show that the strains increase with increasing the crack length. It was found that the cumulative number of cycles leads to increase in the strain values.

Dynamic Crack Growth Analysis of Aluminum Thin Plates Using Analytical and Finite Element Analysis

Bassam Ali Ahmed; Fathi A. Alshamma

Engineering and Technology Journal, 2015, Volume 33, Issue 5, Pages 1065-1078

In this work, the stresses and dynamic crack growth were studied and analyzed in thin flat plate with a surface crack at the center, subjected to cycling low velocity impact loading for two types of aluminum plates (2024, 6061). Analyticalsolution using classical plate theory by using Levy solution employed to determine stresses induced in plate due to the impact load. The impact load applied at the center of surface plate, was calculated by Hertzian contact law. Stresses with respect to time at the crack tip and the velocity of crack growth were calculated through elastic plastic fracture mechanics equations.The size of plastic zone around the crack tip which caused by impact loadingwas found by Dugdal’s model theory.Numerical analysis using program (ANSYS11-APDL) based on finite element method used to analysis the stresses with respect to time at crack tip and then find the velocity of the crack growth under cycling impact loading.The results show that the stresses increase withincreasing in the crack length (i.e:160Mpa at 7mm and 175Mpa at 10mm for Al-6061 also 140Mpa at 7mm and 165Mpa at 10mm for Al-2024).. It was found that the cumulative number of cycles leads to increase in the stress values with increasing in crack growthvelocity.

Study and Analysis of Failure Mechanism of Bolt Adapter in Prosthetic SACH Foot

Muhsin J. Jweeg; Kadhim K. Resan; Ali Abdulameer Najm

Engineering and Technology Journal, 2014, Volume 32, Issue 6, Pages 1442-1457

This paper presents is the study and analysis of failure mechanism of non-articular prosthetic foot (SACH) in the region (Bolt Adapter). The tests of mechanical properties and fatigue behavior were carried for material of which the bolt manufacture from it is a region where the failure occurs out and inserted of these properties to the program of engineering analysis (Ansys) to calculate the safety factor of fatigue and stress equivalent (Von-Mises).The results that both, showed the maximum equivalent stress and the minimum safety factor of fatigue are located in bolt at interface region between the adapter and the foot at notch, however, in static case, the effect was on the ground reaction force at toe off phase more than heel strike phase.