One of the most important phenomenon that occurs in sheet metal forming processes is the spring-back, which causes several geometrical alterations in the parts. The accurate prediction of springback after bending unloading is the key to the tool design, operation control, and precision estimate concerning the part geometry. This study investigated experimentally the effect of pretension in three rolling direction (0, 90, 45 degree) on the springback behavior of the yellow brass, sheet under V shape bending die. The pre-tension ranges from five different levels starting of 11% to 55% from the total strain in each rolling direction by regular increase of 11 %, then bent on a V-die 90 degree for the springback estimate. From experiment the results revealat that the springback increment with increase pretension ratio and the springback in 45° rolling direction is considerable than the sbringback in 90° rolling direction and the springback in 90° is greater than the sbringback in 0° rolling direction.
الديمقراطية في الفكر الاسلامي المعاصر وعلاقتها بنظرية الشورى
The essential objective of this study presents a analyzes of the combination of reality and fantasy in three dramas of Spanish author Alejandro Casona. "Trees die standing" (premiered in Buenos Aires in 1949), “Prohibited suicide in spring” (premiered in Mexico in 1937) and "The boat without fisherman" (premiered in Buenos Aires in 1945).
The first part is an introduction about the biography of Spanish author Alejandro Casona that will allow us to understand some peculiarities of his work in relation to the social historical context of his time.
In the second part of this study we have analyzed elements of reality and fantasy in the th
... Show MoreThis paper deals with the nations of British American Struggle in Caribbean. It
explains British Navy attitude of American expansion in Caribbean. Then continuation of
American expansion in the same place and Britain failure to limit it. This paper high lights the
beginning of acceptance between Britain's and United state, especially after British
submission to United States in Caribbean. Then we study the Anglo – American harmony and
the affection on the Anglo – American relation.
This paper concludes that American influences in Americans which is a truth.
The intellectual and revolutionary movements that have emerged since the beginning of the second half of the first century of the Islamic era did not appear suddenly, but must have preceded by a social consciousness, multi-forms, in the forefront of class awareness and religious awareness, and awareness was more painful, Of the society of the Arabian Peninsula - before Islam - feel it and suffer from it, a sense of injustice and tyranny, oppression and humiliation, and the destruction of dignity as well as poverty and hunger, and the injustice of tribal laws, and tyranny of each other and the tyranny of their heads on the tribes members and families belonging to this tribe or hill
الامن الجماعي في اسيا .. بقلم : لونيك فرو وار
The followers of philosophical lesson in Iraq discover steps and important stages through which the country had passed in , since the control of this thought in Arab Islamic civilization until recent time as well as touch the important changes that had happened on it
Islam has paid great deal of attention to land issue where has been
considered most resources for providing Muslims with water and food and
building on that we notice that the Islamic government worked hardly to give
attention ton the land especially newly included under control of Muslims
especially that they had got with out fighting or bloodshed but had been
included via reconciliation with the landlords so the Muslims had share in that
would be taken either in cash or in materials in a value would be differentiated
following several issues like type of harvest and method of watering the land
and religion of the landlords.
So Muslims had listed laws and rules that enable them typical investment
for that l
همجوارى جغ ا رفياى ميان عربها واي ا رنيان نقش بز رگ در بروز آشكار برخى از روابط وعلاقه
هااى مياان دو زباان عرباى وفار اى وهمچناين مياان دو ادبيااا عرباى وفار اى وگويناد كاه ادبيااا
فار ى قديم اولين ادبياا خارجى كاه باه ادبيااا عرباى مبوا، باود وهماين باعا انبشاار زباان عرباى
در اي ا رن شد. وبعد از فبح ا لامى زبان فار ى بيشبر وا ه ژ هاى خود از زبان عربى گرفاا همچناين
به زبان عربى ب يارى از وا ه ژ هاى وادر كرد
يناقش هذه البحث فكرة الهوية الوطنية العراقية عند الإمام محمد تقي الشيرازي، والوقوف على دراسة سيرته الذاتية والعلمية، وتحديد مواقفه السياسية، ورؤيته لفكرة الهوية الوطنية العراقية، من خلال البحث والتحليل لأبرز مواقفه ورسائله وافكاره السياسية.
مكانية استخدام السوق المالية في التنبؤ بالدورات الاقتصادية