کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1726691 1520761 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Impact test simulations of stiffened plates using the micromechanical porous plasticity model
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی دریا (اقیانوس)
پیش نمایش صفحه اول مقاله
Impact test simulations of stiffened plates using the micromechanical porous plasticity model
چکیده انگلیسی

This paper first reviews the physical meanings and the expressions of two representative strain rate models: CSM (Cowper–Symonds model) and JCM (Johnson–Cook model). Since it is known that the CSM and JCM are suitable for low-intermediate and intermediate-high rate ranges, many studies regarding marine accidents such as ship-to-ship collisions, ship-to-rock groundings, and explosions in FPSO have employed the former in particular. A formula to predict the material constant of the CSM is introduced from a literature survey. The validity of the formula is proved by comparing with strain rate test results of high strength marine structural steels of DH-36. Numerical simulations with two different material constitutive equations, the classical metal plasticity model based on the von Mises yield function and the micromechanical porous plasticity model based on the Gurson yield function, have been carried out for stiffened plates under impact loading. It is concluded that the porous plasticity model with the porosity fracture criterion can quantitatively predict plastic deformation process and final fracture under impact loading if the material constants are properly chosen.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ocean Engineering - Volume 37, Issues 8–9, June 2010, Pages 749–756
نویسندگان
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