کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7898197 | 1510133 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A validation procedure for numerical models of ceramic powder pressing
ترجمه فارسی عنوان
روش اعتبارسنجی برای مدل های عددی فشار دادن پودر سرامیک
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کلمات کلیدی
مواد گرانول آلومینا، فشار دادن، مدل عنصر محدود مدل سازی مواد،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
This paper describes an experimental procedure to validate numerical models used to simulate powder pressing. It consists mainly of two steps: closed die uniaxial pressing followed by isostatic pressing. The uniaxial pressing causes a non-homogeneous density distribution in the pressing direction as a consequence of friction between die walls and powder. In the isostatic pressing, less compacted regions have a larger volumetric strain, resulting in a non-trivial shape of the re-compacted part, which computes indirectly the previous density distribution. Experimental data from both steps are compared to the results from finite element models. The Drucker-Prager/Cap constitutive model was used to represent the compaction of alumina powder. Several simulations covering a range of parameters obtained from the literature were performed to calibrate the model, through an inverse analysis. The developed procedure sheds a light in the methods to calibrate and/or validate constitutive models used for powder pressing.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 38, Issue 8, July 2018, Pages 2928-2936
Journal: Journal of the European Ceramic Society - Volume 38, Issue 8, July 2018, Pages 2928-2936
نویسندگان
C.C. Melo, A.L.I. Moraes, F.O. Rocco, F.S. Montilha, R.B. Canto,