دانلود رايگان

ايده خوب

آموزش-ايده-مصاحبه-كارآفريني-كامپيوتر-علم-شكوفايي-توافق هسته اي

موزه هنرهاي معاصر تهران

در مورد موزه:

در طراحي موزه هنرهاي معاصر دو ديدگاه مورد بررسي قرار گرفته است يكي در محوطه ي اطراف سايت يعني پارك لاله كه پارك نسبتا بزرگي است و ديگري مسير دسترسي كه در كنار محور هاي ارتباطي پارك است.

كامران ديبا در طراحي از موزه حياط مركزي را انتخاب كرد كه علاوه بر اينكه يكي از نشانه هاي معماري ايراني باشد بتواند فضايي مجزا از پارك را ايجاد كند.علاوه بر آن كامران ديبا با طراحي ديد مناسب از حياط مركزي به پارك سعي بر برقراري رابطه با پارك نيز دارد.

اين رابطه در طراحي داخلي نيز با پنجره هاي ديواري وسقفي حفظ شده است.

فايل مورد نظر پاورپوينت بوده و داراي 15اسلايد ميباشد

مقاله جوشكاري Study of Forward Method on Imaging of Nugget in Resistance Spot Welding

مقاله جوشكاري با عنوان : Study of Forward Method on Imaging of Nugget in Resistance Spot Welding

Wenbo Xuan, Zhen Luo, Yang Li, Naifeng Fan

چكيده:

Inversion imaging of nugget in resistance spot
welding (RSW) is a new developing method of monitoring the
welding quality in RSW in recent years, which is based on the
rapid developments of the inverse problems in mathematics
and physics. This paper does some research on the forward
problem of inversion imaging of nugget and establishes the
forward model of RSW on the basis of the forward theory and
the electromagnetic field theory. And the soft wares of
MATLAB and ANSYS are used to simulate the
electromagnetic field of the forward model. The model’s
reliability is verified by comparing the experimental results
with the simulated results, which makes a good foundation for
the inversion imaging of nugget in RSW.

نقد راه آهن ليون فرانسه

معماري هاي - تك

آموزش-استخدامي-مصاحبه-

آموزش-استخدامي-مصاحبه-كارآفريني-كامپيوتر-علم-شكوفايي-توافق هسته اي

مقاله جوشكاري Finite element analysis of resistance spot welding process

مقاله جوشكاري با عنوان : Finite element analysis of resistance spot welding process

Guo Zhong

چكيده :

A coupled finite element model is developed to
analyze the transient thermal and mechanical behaviors of
Resistance Spot Welding (RSW) process using commercial
software ANSYS. A direct-coupled electrical-thermal Finite
Element Analysis (FEA) is firstly performed to simulate the
transient thermal characteristics of RSW process. The thermal
history of the whole process and the temperature distribution of
the weldment are obtained through the analysis. Then based on
the thermal results a sequential coupled thermo-elastic-plastic
analysis is conducted to determine the mechanical features of
RSW process. The mechanical features, including the
distributions of the contact pressure at both the faying surface
and the electrode-workpiece interface, the stress and strain
distributions in the weldment and their changes during the RSW
process and the deformation of the weldment are also calculated.

موزه حيات و محيط زيست كاروليناي جنوبي

سيستم هاي مختلف ساختماني موزه همگي نمودي از موضوعات و زمينه هاي نظري و عملي پروژه هستند. سيستم گرمايش و سرمايش، سيستم كف تابشي خواهد بود كه در آن از فشردگي خاك و خنكي آب براي تنظيم درجه حرارت ساختمان استفاده مي شود.

فايل مورد نظر پاورپوينت بوده و داراي 11 اسلايد ميباشد.

1ICDL

آموزش-icdl 1-كارآفريني-كامپيوتر-علم-شكوفايي-توافق هسته اي

موزه مرسدس بنز

نام پروژه:مرسدس بنز

مقاله جوشكاري Ultrasonic spot welded AZ31 magnesium alloy: Microstructure, texture, and lap shear strength

مقاله جوشكاري با عنوان : Ultrasonic spot welded AZ31 magnesium alloy: Microstructure, texture, and lap shear strength

V.K. Patel, S.D. Bhole n, D.L. Chen

چكيده:

The structural application of ultra-lightweight magnesium alloys inevitably involves welding and
joining. A solid-state welding – ultrasonic spot welding (USW) – was conducted on AZ31B-H24 Mg
alloy sheet by varying a key parameter of welding energy in this study, aiming to identify the changes
in the microstructure, crystallographic texture, and lap shear tensile strength. The grain size was
observed to increase with increasing welding energy. Crystallographic texture determined via X-ray
diffraction showed a significant change that corresponded well to the change in the deformation and
recrystallization mechanisms of the Mg alloy. The lap shear strength first increased with increasing
energy input, reached the maximum value at a welding energy of 2000 J, then decreased. The welds
generally fractured along the joint interface when the welding energy was lower than 2000 J, while
fracture occurred at the periphery of the joint (button pull-out) for the samples made with an energy
input of higher than 2000 J.