کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
786608 1465603 2015 25 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A new thermodynamical framework for finite strain multiplicative elastoplasticity coupled to anisotropic damage
ترجمه فارسی عنوان
یک چارچوب ترمودینامیکی جدید برای الاستوپلاستیک چسبندگی کوانتومی محدود با آسیب ناشی از انزایوتروپیک
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی


• Multiplicative elastoplasticity coupled to anisotropic damage.
• Novel definition of the effective Mandel-like stress tensor.
• Proposed framework thermodynamically consistent.
• Constitutive model using the proposed framework.

The thermodynamical framework of an elastoplastic model coupled to anisotropic damage is presented in this paper. In the finite strain context, the proposed model is based on the multiplicative decomposition of the strain gradient into elastic and plastic parts. The anisotropic degradation is introduced by means of a second order tensor and another intermediate configuration is introduced by fictitiously removing this degradation from the plastic intermediate configuration. To enhance the physical meaning of the Mandel-like stress measure work conjugated to the inelastic flow stated in this fictitious configuration, i.e. the “effective stress”, a new damage rate tensor is defined with its associated push-forward and pull-back operations. The emphasis in this paper is placed on the description of the interesting properties of the novel definitions of the push-forward and pull-back operations which are discussed through a thermodynamical framework. Furthermore, a specific constitutive model with the plastic and damage flow rules deduced from the restrictions imposed by the second law of thermodynamics is discussed with an application on an asphalt concrete material where the anisotropic evolution of the damage is highlighted.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Plasticity - Volume 70, July 2015, Pages 126–150
نویسندگان
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