کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
280013 1430382 2006 32 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The least-squares meshfree method for rigid-plasticity with frictional contact
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
The least-squares meshfree method for rigid-plasticity with frictional contact
چکیده انگلیسی

The least-squares meshfree method (LSMFM) for rigid-plasticity based on J2-flow rule and infinitesimal theory is proposed. In the least-squares formulation the squared residuals of the constitutive and equilibrium equations are minimized. Those residuals are represented in a form of first-order differential system using the velocity and stress components as nodal unknowns and thus the proposed formulation is a mixed-type method. Also the penalty scheme for the enforcement of the boundary and frictional contact conditions is devised and the reshaping of nodal supports is introduced to avoid the difficulties due to the severe local deformation near the contact interface. The proposed method does not require any structure of extrinsic cells for the construction of shape functions, the treatment of incompressibility, the integration of variational formulation and the reconstruction of approximation. Through some numerical examples of metal forming processes, the validity and effectiveness of the method are discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Solids and Structures - Volume 43, Issues 25–26, December 2006, Pages 7450–7481
نویسندگان
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