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.
Chapter One
First, the importance of research and the need for him
Highlight the status of the nation and occupies a decent position among nations by what they offer for the good of humanity and tender, which is based mainly on the human and material wealth owned by the nation.
The investment of this wealth investment scientifically accurate based on the strong foundation that qualifies them to heights of glory, so stand out necessary development of all energies Alepeshriaaly the limit can not be considered as these energies fortune unless all elements of effective elements characterized by the positive interaction in various spheres of life and in the in
... Show MoreThe political system during the reign of Imam Ali (peace be upon him) was based on explicit openness in its features and objectives away from misinformation, and built its foundations and foundations on the Koranic legislation, and enacted by the Prophet (peace be upon him), and the decent legislation required by humanity
ان حماية البيئة وتخفيض التكاليف من األهداف التي تسعى الوحدات االقتصادية الى تحقيقها لكي تتماشى مع التوجه العالمي لحماية الموارد الطبيعية وإنتاج منتجات صديقة للبيئة وفي الوقت نفسه التخلص من االلتزامات التي تتحملها الوحدات االقتصادية من تكاليف بيئية وغر امات مما يؤدي الى ارتفاع كلف االنتاج ، يهدف البحث الى دراسة المرتكزات المعرفية الستراتيجية اإلنتاج األنظف وتحديد التكاليف التي يمكن تخفيضها خالل مراحل اا
... Show Moreيهدف البحث إلىبيان دور الانتاج الانظف وتأثير تطبيقه على تكاليف الوحدة الاقتصادية وادواته وتقنياته التي تساهم في دعم الميزة التنافسية المستدامة
Human wealth is the most valuable wealth on the face of the earth, and building the intellectual, cultural and scientific human being is the greatest process carried out by all religions and philosophies at all times, and the divine law aimed at reforming the earth, including in order to preserve this great wealth, and to preserve its existential and qualitative entity.
Human wealth is the most valuable wealth on the face of the earth, and building the intellectual, cultural and scientific human being is the greatest process carried out by all religions and philosophies at all times, and the divine law aimed at reforming the earth, including in order to preserve this great wealth, and to preserve its existential and qualitative entity
إدارة المخاطر في الوحدات الإقتصادية الصناعية بإستعمال مخطط باريتو
The words in the Holy Qur’an are distinguished by the
accuracy of expression, their elegance, the lightness of their
performance, the harmony of their timbre, as well as the ease of
their pronunciation. We find the coarse words in which the
movement of sounds and the hesitation of the soul are mixed, as
it was distinguished by the abundance of its words indicating the
same meaning without a phenomenon that the reader or the
listener notices
Using religious characters which come from religion is a significant means that poets applied in their texts. The Iraqi poet Adib Kamal Aldin applied religious characters as an active means helping the theme of the text and playing a great role in expanding the meanings and their implications in the text.