کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
786748 1465614 2014 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Constitutive equations for modeling non-Schmid effects in single crystal bcc-Fe at low and ambient temperatures
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Constitutive equations for modeling non-Schmid effects in single crystal bcc-Fe at low and ambient temperatures
چکیده انگلیسی


• A crystal plasticity framework is developed for modeling non-Schmid effects in bcc crystals.
• Decay of the non-Schmid stresses with increase in temperature is modeled.
• Constitutive equations are developed for decay of the non-Schmid stresses with inelastic deformation.
• The stress–strain response and hardening behavior of bcc-Fe at 298 K is modeled and fit to experiments.
• Orientation- and temperature-dependent yield stress and tension–compression asymmetry of bcc-Fe is modeled.

Constitutive equations are developed for single crystal bcc-Fe at low and ambient temperatures based on the assumption that non-Schmid effects are primarily influential on orientation dependence and tension–compression asymmetry of the initial yield stress. Temperature dependence of the non-Schmid parameters is extracted from a fit to available experimental data. Constitutive models are also developed for the decay of the influence of non-Schmid stresses with inelastic deformation. These equations are used in a dislocation density-based crystal plasticity framework to model the mechanical behavior of bcc-Fe. The stress–strain response is modeled and fit to the experimental data at 298 K. Orientation-dependent yield stress and tension–compression asymmetry simulations are compared to available experiments.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Plasticity - Volume 59, August 2014, Pages 1–14
نویسندگان
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