کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
279786 1430372 2007 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Elasto-plastic material parameter identification by inverse methods: Calculation of the sensitivity matrix
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Elasto-plastic material parameter identification by inverse methods: Calculation of the sensitivity matrix
چکیده انگلیسی

Inverse methods offer a powerful tool for the identification of elasto-plastic material properties of metals. The basic principle of the inverse method we are studying, is to compare an experimentally measured strain field with a strain field computed by a finite element (FE) model. The material parameters in the FE model are iteratively tuned in such a way that the numerically computed strain field matches the experimentally measured field as closely as possible. One of the building blocks in this identification procedure is the optimization algorithm for the material parameters in the numerical model. The key problem of this optimization algorithm is the determination of a sensitivity matrix, which expresses the sensitivities of the strains with respect to the material parameters. This paper presents an analytical method for the calculation of this sensitivity matrix in the case of a tensile test with non-rotating principal axes of strain.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Solids and Structures - Volume 44, Issue 13, 15 June 2007, Pages 4329–4341
نویسندگان
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