کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7174194 1464977 2016 21 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Considerations on parameter identification and material response for Gurson-type and Lemaitre-type constitutive models
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Considerations on parameter identification and material response for Gurson-type and Lemaitre-type constitutive models
چکیده انگلیسی
The ongoing pursuit of quality improvement and cost reduction in metal forming operations has instigated intense research on both material modelling and identification of constitutive parameters. Metal forming applications involving large plastic deformations are subject to mechanical degradation and failure, thereby recommending use of damage models. Notwithstanding, accurate predictions require material parameters able to describe realistic stress-strain paths, especially when involving large inelastic deformations under non-uniform stress states. The present work addresses identification of material parameters for Gurson-type and Lemaitre-type constitutive models for a low alloy steel based on a hybrid global-local optimization technique. The simulations show that, in the featured examples, material degradation takes place under non-uniform stress states precluding application of classical calibration techniques. The material response to loading also shows that the Lemaitre-type material provides a somewhat better approximation to the experimental data than the Gurson-type model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mechanical Sciences - Volume 106, February 2016, Pages 254-265
نویسندگان
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