کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
268242 504427 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modeling and parameter identification of granular plastomer conglomerate submitted to internal underpressure
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
پیش نمایش صفحه اول مقاله
Modeling and parameter identification of granular plastomer conglomerate submitted to internal underpressure
چکیده انگلیسی

The paper deals with a conglomerate, composed of granular materials encapsulated in a tight, flexible envelope. The structure is submitted to an internal underpressure using a vacuum pump. The underpressure value has a great impact on the behaviour and properties of the medium. The experimental study and the modeling of this phenomenon are investigated in this work. Results of uniaxial tensile tests and characteristic hardening curves are presented for structures filled up with plastic grains. The nonlinear behaviour of such materials is modeled using the viscoplastic constitutive Chaboche’s law, requiring determination of several material parameters. The parameter identification problem is formulated as an optimization task and solved using the evolutionary algorithm. Simulated graphs follow precisely the experimental curves. The proposed methodology can be easily adapted to other constitutive models and experiments.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Structures - Volume 32, Issue 8, August 2010, Pages 2424–2431
نویسندگان
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