ISSN: 1999-8716

Keywords : Keyword


A STUDY FOR CONVERSION OF MECHANICAL CONTROL SYSTEM TO ELECTRICAL CONTROL SYSTEM

Muhanad Dheyaa Hashim; Ali Fahad Fahem; Issam Haider Jassim

DIYALA JOURNAL OF ENGINEERING SCIENCES, 2012, Volume 5, Issue 1, Pages 88-102

ABSTRACT:- This paper study the conversion of the mechannical control system ton electrical control system for the softdrink machine which use gears as timers in the process of counting the number of the bottles and in the process of controlling the level of the softdrink in the bottle. The electricl control system use electronical components such as integrate circuits (counters , timers , LCD display ) , using the counter to count the number of the bottles with the use of the photosensor ( in our paper counting every four bottles )and adjusting the level of the fluid by one of the following methods. The first method of controling the level of the liquid is by the timer which is fixed at time which is required to fill the bottle to the adequate level and it is adjustable according to the volume of the bottle. The Second method for conteroling the level of the liquid is the ultrasonic device which use the ultrasonic sensor to control the level of the fluid and it is adjustable according to the distance between the sensor and the bottle. The results of the electrical and mechanical models achived the satisfication results .
Keyword : US Tx – ultrasonic transmiter, US Rx – ultrasonic reciever, SONAR – sound navigation and ranging, Radar – radio detection and ranging, LCD –liquid crystal display, PLC – Programmable Logic Controller.

MECHANICAL AND PHYSICAL PROPERTIES OF HIGH DENSITY POLYETHYLENE FILLED WITH CARBON BLACK AND TITANIUM DIOXIDE

Zanaib.Y.Shnean

DIYALA JOURNAL OF ENGINEERING SCIENCES, 2012, Volume 5, Issue 1, Pages 147-159

ABSTRACT:- In this work composite material composed of high density polyethylene and inorganic pigment (carbon black and titanium dioxide) was prepared. Different amounts of carbon black and titanium dioxide (2– 15) wt% were added as filler. The preparation of filled and unfilled (High density polyethylene /Carbon black and titanium dioxide) composite was carried out using a single – screw extruder operated at a temperature of (170 – 190)oC.The incorporation was performed in a single screw extruder and sheets specimens were obtained by hot compression from extruded materials. Many mechanical and physical tests were used to determine the properties of the prepared composite material which involved compression strength, impact strength and modulus of elasticity for all the preparation composite. An untreated HDPE sheet is used for the purpose of comparison. In this study, the influence of addition of Carbon black and titanium dioxide, on the mechanical ,electrical and thermal a properties test of high-density polyethylene (HDPE). The results show that the use of pigments, carbon black and TiO2 in appropriate concentration ratios give a reliable improvement in the mechanical properties. The weight fraction of the carbon blacks and titanium dioxide ranged from 0.0 up to 15 wt % with the high density polyethylene. By discharging a high voltage through the composite it was found that the resistivity of the composite decreased. Carbon black and titanium dioxide –highdensity polyethylene composites show significant differences from the neat high-density
polyethylene measured in the frequency range. It was found that the carbon black and titanium dioxide/ high-density polyethylene
composites have better thermal properties than the neat high-density polyethylene.
Keyword: high density polyethylene. Titanium dioxide, Carbon black, Electrical properties, Thermal conductivity, Mechanical properties

EVALUATING OF MULTI-STORY BUILDING REINFORCEMENT CONCRETE IN THE UNIVERSITY OF DIYALA BY TESTING THE ULTRASONIC PULSE VELOCITY AND SCHMIDT HAMMER

Dr. Khattab S. AbdulRazzaq

DIYALA JOURNAL OF ENGINEERING SCIENCES, 2012, Volume 5, Issue 1, Pages 1-8

ABSTRACT:- The research shows the evaluation of the actual study of multi-story building in the University of Diyala by testing the ultrasonic pulse velocity and Schmidt hammer . The study has been conducted by investigating the results of two methods included
( 14 columns and 14 points by using three reading of pulse velocity and ten reading of Schmidt hammer test , for the building ).The results can be used for the evaluation of the pulse velocity readings between ( 3.4 – 5.0 km/sec ) and the Schmidt hammer test readings
between ( 20 – 33). The comparison for the evaluation of building was made by three equations,(Based on Dr .Alsamerie,etc equation (1), Dr. Reof ,etc equation (2),and Dr. Isam ,etc equation (3) .The evaluation of results indicated that Eq. (1) gives higher compressive strength by (20.7 %) , and the Eq. (2) gives also higher compressive strength by (14.6%) when compared with Eq. (3). Therefore, the evaluation cant not used one equation ,but using more equations and take the average . we may get acceptable results for concrete strength .
Keyword: pulse velocity, Schmidt hammer, evaluation, building, non destructive test, compressive strength .

EXPERIMENTAL BOND FORCE-SLIP RELATIONSHIPS FOR EPOXY-COATED REINFORCING BARS UNDER ELEVATED TEMPERATURE CONDITIONS

Saad Khalaf Mohaisen

DIYALA JOURNAL OF ENGINEERING SCIENCES, 2012, Volume 5, Issue 1, Pages 160-171

ABSRACT:- This paper presents an experimental investigation that reveals bond force - slip relationships for epoxy-coated reinforcing bars under elevated temperature conditions. The obtained experimental results indicated that coating reinforcing bars with epoxy tends to degrade the residual bond strength at elevated temperatures.
Keyword: bond, epoxy, bond-slip, slip, high temperature.