ALMUSTAFA ENGINEERING JOURNAL

1

Testing Standards for Energy Absorber of Car Bumper

Mustafa Kod, Prof. Dr. Abdulrahman N. Abood

English

Abstract

The purpose of an automobile bumper\'s energy absorber is to deflect the kinetic energy of a collision-causing vehicle. This is typically achieved using a variety of materials and technologies, including crushable foam, plastic, or metal honeycomb structures, and springs or other flexible elements. The purpose of an energy absorber is to reduce the amount of force that is transmitted to the occupants of a vehicle during a collision, which can help to prevent injuries and save lives.

Keywords

Automobile Bumper energy absorber car crashes.

2

Surface properties of glass ionomer cement after addition of Date seeds powder

Fryal Adeel, Lubna Ghalib*

English

Full Text Issues

Abstract

The aim of this study was to investigate the effect of adding date seeds powder to the glass ionomer cement on surface roughness, water sorption, and wettability. A conventional glass ionomer powder was mixed with date seed powders in different amounts. Mix 1, 3, and 5% (w/w) date seed powder with the glass ionomer powder by hand for 2 minutes. The samples were immersed in an artificial saliva solution during one-day, one-week, and one-month test periods. After 30 days, the surface roughness Ra values of the samples were found to be higher. After a month, water absorption decreased among the tested samples. In the wettability test, all of the samples were found to be hydrophilic and have a contact angle of less than 90 degrees. But all of the specimens are very close to being water-resistant.

Keywords

dates seed Glass ionomer cement surface roughness water sorption wettability.

3

Comparative study and evaluation of the compressive strength and mechanical wear resistance of colored geopolymer concrete based on fly ash as a binder

Mohammed Qasim Motair, Mohammed Ali Abdulrehman, Khalid Morshed Eweed

English

Full Text Issues

Abstract

The purpose of this study is to conduct a comparative evaluation of the compressive strength and mechanical abrasion resistance of colored geopolymer concrete based on fly ash as a base material. Three percentages of 1%, 2% and 3% of three colored oxides were considered, which are red iron oxide, green chromium oxide and yellow iron hydroxide from fly ash. High plasticizer of the mixture to obtain workability in addition to a small
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amount of water. The results of the study showed that the compressive strength and abrasion resistance had the best performance when the percentage of addition was 1% for the red and yellow colors and 2% for the green colour, which achieved the highest results and the best mechanical wear resistance aluminum oxide.

Keywords

fly ash geopolymer concrete mechanical properties and wear resistance. Pigments

4

A Review on decorative cement

English

Full Text Issues

Abstract

In this research, a group of the most important researches related to the cement used for decorative purposes, which is colored cement, which is the main material in the production of colored concrete, was reviewed. It has been concluded that the use of inorganic pigments is better than natural pigment, the percentage of inorganic pigment powders must not exceed 2% wt. of cement, because the pigment's particle size is smaller than that of cement, it tends to decrease the workability of concrete and mortar. In some applications we need to improve workability, in these cases may be adding superplasticizer and the percentage of pigments in the liquid state cannot be determined because they depend on several variables.

Keywords

colored cement colored concrete decorative cement pigment

Keywords

colored cement colored concrete decorative cement pigment

5

Review of Friction stir welding (FSW) Lec.

English

Full Text Issues

Abstract

A type of steel weld known as friction stir welding (FSW) is utilized. A utilized device which could be utilized for joining two works without them. Dissolve the workpiece. Friction between the workpiece and the tool causes thermal to be produced. Solubility isn't eased by this heat; just metal is. For joining its goal, the tool glides over the surface that is softening. Welding range expands as needed on a daily basis. The investigation of the FSW method, microscopic features, mechanical characteristics, and heat soldering function are the basis for this research. Treatment of joints, experiment design, Joints of aluminum and their alloys.

Keywords

Corrosion of the joints. design of experiments FSW process analysis Mechanical Properties Microstructural properties Non-consumable tool Post weld heat treatment of the joints Solid type welding Welding properties

6

Review on heat transfer performance in porous media

English

Full Text Issues

Abstract

In the presented study, a review has been studied the history of heat transfer through porous materials. Four sides have been the focus of this review: materials, porosity, heat transfer and applications. The paper contains listed many references. It is provides an overview of previous research on knowledge sharing. Many papers reviewed here is relate to experimental works, including numerical, analytical for heat transfer systems. In addition of equipment’s design, heat transfer has a major role at applications for natural systems also.

Keywords

Forced convection Heat Transfer porous media

Articles in This Issue

Testing Standards for Energy Absorber of Car Bumper

Abstract

Keywords

Surface properties of glass ionomer cement after addition of Date seeds powder

Abstract

Keywords

Comparative study and evaluation of the compressive strength and mechanical wear resistance of colored geopolymer concrete based on fly ash as a binder

Abstract

Keywords

A Review on decorative cement

Abstract

Keywords

Keywords

Review of Friction stir welding (FSW) Lec.

Abstract

Keywords

Review on heat transfer performance in porous media

Abstract

Keywords