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RISNon-linear influence of hydrostatic pressure on the yielding of asymmetric anisotropic sheet metals
The objective of the current research is the investigation into possible non-linear influence of hydrostatic pressure on yielding of asymmetric (exhibiting the so-called ‘‘strength-differential effect’’) anisotropic sheet ...
A modified Burzynski criterion for anisotropic pressure-dependent materials
In this paper the Burzynski criterion, which was introduced for isotropic pressure-dependent materials, is modified for anisotropic pressure-dependent materials in plane-stress condition. The modified criterion can be ...
Implementing the New First and Second Differentiation of a General Yield Surface in Explicit and Implicit Rate- Independent Plasticity
In the current research with novel first and second differentiations of a yield function,
Euler forward along with Euler backward with its consistent elastic-plastic modulus are
newly implemented in finite ...
A closed-form semi analytical elastic-plastic solution for predictiong the onset of flange wrinkling in deep-drawing of a two-layered circular plate
In this paper to predict the critical conditions for onset of elastic-plastic wrinkling of flange of a two-layered circular blank during the deep-drawing process a closed-form semianalytical elastic-plastic solution using ...
Combination of Modified Yld2000-2d and Yld2000-2d in Anisotropic Pressure Dependent Sheet Metals
In the current research to model anisotropic asymmetric sheet metals a new non-AFR criterion is presented. In the new model, Modified Yld2000-2d proposed by Lou et al. (2013) is considered as yield function and Yld2000-2d ...
An analytical study on elastic flange wrnkling of laminated circular plates in deep drawing process
Based on two-dimensional plane stress wrinkling model of an elastic annular plate and a bifurcation functional from Hill s general theory of uniqueness for polar coordinate, the critical conditions for the elastic wrinkling ...
به دست آوردن پاسخی صریح برای چروکیدگی لبه صفحات گرد به کمک ورق گیر در طی فرآیند کشش عمیق با استفاده از تئوری تغییر شکل کوچک
در این مطالعه بر اساس مدل دو بعدی تنش صفحه ای و فانکشنال دو شاخه ای بر مبنای تئوری عمومی یکتایی هیل در مختصات قطبی، شرایط بحرانی چروکیدگی پلاستیک ورق گرد (تعداد موج های تشکیل شده و همچنین محدوده چروکیدگی لبه ورق) به کمک ...
The Effect of Blankholder on Flange Plastic Wrinkling of Laminated Circular Plates in Deep Drawing Process
Based on two-dimensional plane stress wrinkling model of a plastic annular plate with blankholder and a bifurcation functional from Hill\\'s general theory of uniqueness for polar coordinate, the critical conditions for ...
بررسی تحلیلی چروکیدگی لبه پلاستیک صفحات گرد با استفاده از تئوری تغییر شکل کوچک در فرآیند کشش عمیق
بر اساس مدل دو بعدی تنش صفحه ای و فانکشنال دو شاخه ای بر اساس تئوری عمومی یکتایی هیل در مختصات قطبی، شرایط بحرانی چروکیدگی لبه پلاستیک ورق های گرد (تعداد موج های تشکیل شده در لبه ورق و همچنین محدوده چروکیدگی آن)، طی فرآیند ...
Elastic-Plastic Flange Wrinkling of Circular Platesin i Deep Drawing Process
This paper deals with two-dimensional plane stress wrinkling model of elastic/plastic annular plate. Based on energy method and nonlinearity of strain-displacement law, a bifurcation functional in polar coordinate is derived ...