کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1564785 1514177 2016 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The dynamical mechanical properties of tungsten under compression at working temperature range of divertors
ترجمه فارسی عنوان
خواص مکانیکی دینامیکی تنگستن تحت فشار در محدوده دمای کار diverters
کلمات کلیدی
تنگستن؛ بارهای الکترومغناطیسی؛ رفتار پویای فشاری مکانیکی؛ معادله ساختاری؛ Divertor
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی هسته ای و مهندسی
چکیده انگلیسی


• Test research on dynamic properties of tungsten at working temperature range and strain rate range of divertors.
• Constitutive equation descrbing strain hardening, strain rate hardening and temperature softening.
• A guidance to estimate dynamical response and damage evolution of tungsten divertor components under impact.

In the divertor structure of ITER and EAST with mono-block module, tungsten plays not only a role of armor material but also a role of structural material, because electromagnetic (EM) impact will be exerted on tungsten components in VDEs or CQ. The EM loads can reach to 100 MN, which would cause high strain rates. In addition, directly exposed to high-temperature plasma, the temperature regime of divertor components is complex. Aiming at studying dynamical response of tungsten divertors under EM loads, an experiment on tungsten employed in EAST divertors was performed using a Kolsky bar system. The testing strain rates and temperatures is derived from actual working conditions, which makes the constitutive equation concluded by using John-Cook model and testing data very accurate and practical. The work would give a guidance to estimate the dynamical response, fatigue life and damage evolution of tungsten divertor components under EM impact loads.

From the comparison between the experimental curves and the predicted curves calculated by adopting the corrected m, it is very clear that the new model is of great capability to explain the deformation behavior of the tungsten material under dynamic compression at high temperatures. (EC, PC and PCM refers to experimental curve, predicted curve and predicted curve with a corrected m. Different colors represent different scenarios.).Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 469, February 2016, Pages 120–124
نویسندگان
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