In this work, functionally graded materials were synthesized by centrifugal technique at different
volume fractions 0.5, 1, 1.5, and 2% Vf with a rotation speed of 1200 rpm and a constant rotation time, T
= 6 min . The mechanical properties were characterized to study the graded and non-graded nanocomposites
and the pure epoxy material. The mechanical tests showed that graded and non-graded added alumina
(Al2O3) nanoparticles enhanced the effect more than pure epoxy. The maximum difference in impact strength
occurred at (FGM), which was loaded from the rich side of the nano-alumina where the maximum value was
at 1% Vf by 133.33% of the sample epoxy side. The flexural strength and Young modulus of the functionally
graded samples were enhanced by 43.69% and 52.74%, respectively, if loaded from the alumina-rich side.
On the other hand, when loading (FGM) from the epoxy side, the amount of decrease in bending resistance
was 122.4% while the improvement in bending modulus was 81.11% compared to pure epoxy. Scanning
electron microscopy (SEM) revealed the fracture surface of the impact samples and the gradient scattering of
nanoparticles in the epoxy matrix. Numerous applications can be used to manufacture the functionally
graded material by centrifugal casting method, including for the manufacture of gears and all bending
applications such as leaf springs.
Agriculture is one of the important job in the human life. Since the first beginning of humanity life, agriculture was the basis property in order to get individual foods. The Holy Quran and Hadith were supplied agriculture and all Muslims were followed this field especially after Islamic state expansion and its possessive many lands which developed directly our Islamic civilization.
Spiritual training is aimed to plant the faith in individuals soul because it is the basis of the religion, but rather a strong deferent that accompanies human life in his thinking and management and awakens
إن تاريخ التعليم في السنوات الأخيرة هو قصة تحكي تطور التعليم من بُعد والتعليم المفتوح وباختصار " الإنفتاح التعليمي " Opening up education؛فعلى مدى عقود قليلة عملت التكنولوجيا الحديثة مثل الكمبيوتر الشخصي ، والوسائط المتعددة التفاعلية ، والإنترنت باستمرار على توسيع فرص
The codification of the social history of the city of Baghdad will be filled with an inherited folklore and folklore that has been descended to it from the previous generations with all its tales of folk tales, metaphors, parables, crafts and industries. Immortal
يُعدّ التناص أحد تقانات البلاغة الحديثة – الأسلوبية- التي تنهض برقي النص ، بوصفه عنصراً فاعلاً في بلورة المعنى وتناغمه مع قصدية المتكلّم ؛ ممّا يسهم في تواشج علائقية البنية الدلالية للنص وتعاضدها النسقي في تكوينه ؛ لفتح نافذة التأويل عند المتلقي بحثاً عن الدلالات المتغلغلة في البنية العميقة ، وهذا ما بدا واضحاً في متن كتاب (غرر البلاغة) للصابي ، فهو يزخر بنصوص تناصية دينية وأدبية ، تمدّ المعنى بطاقات جمالية م
... Show MoreВведение
Международные контакты обусловили интерес к изучению основной формы общения – диалога. Форма диалога в каждом из контактирующих в процессе общения языков должна быть рассмотрена в разных аспектах – не только лингвистическом, но и социолингвистическом и этическом. Это объясняется тем, что в речевой коммуникации необходима как адекватность выражения мысли, так и соблюдение тради
... Show MoreThe use of containers in transportation leads to the reduction in time and effort of the process of loading and unloading of goods as well as protecting the goods from damage and breakage and to reduce the financial costs.
. This development has led also to make changes in the sizes and capacity of ships, therefore changes in the ports must be taken place where they must be provided with an appropriate depth for such vessels, that means the increase in the depth of ports and the establishment of wide storage yards and to provide appropriate mechanisms for handling process.
In this study, the researcher has dealt with this type of transport business in Iraqi ports, namely:
1- Khur Al-Zubair port.
2- Um Qaser port.
In order