کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
279340 1430339 2009 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A thermodynamic method for the construction of a cohesive law from a nonlocal damage model
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
A thermodynamic method for the construction of a cohesive law from a nonlocal damage model
چکیده انگلیسی

Several published papers deal with the possibility of replacing a damage finite element model by a combination of cohesive zones and finite elements. The focus of the paper is to show under which conditions this change of model can be done in an energy-wise manner.The objective is to build a cohesive model based on a known damage model, without making any assumption on the shape of the cohesive law. The method is characterized, on the one hand, by the use of a well-defined thermodynamic framework for the cohesive model and, on the other hand, by the idea that the main quantity which must be maintained through the change of model is the energy dissipated by the structure. An analysis of the stability criteria enables us to determine the domains of validity of the different models. Thus, we show that it is consistent to derive the cohesive law from a given nonlocal damage model because the occurrence of a discontinuity can be viewed as an alternative way to limit localization. The method is illustrated on one-dimensional examples and a numerical resolution method for the problem with a cohesive zone is presented.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Solids and Structures - Volume 46, Issue 6, 15 March 2009, Pages 1476–1490
نویسندگان
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