کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4922639 1430192 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A new stable inverse method for identification of the elastic constants of a three-dimensional generally anisotropic solid
ترجمه فارسی عنوان
یک روش معکوس پایدار جدید برای شناسایی ثابت های الاستیک یک جامد بی نظیر معمولا سه بعدی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
This article presents a new approach for inverse identification of all elastic constants of a 3D generally anisotropic solid with arbitrary geometry via measured strain data. To eradicate the nonlinear inequality constraints posed on the elastic constants, the problem is first transformed to an unconstrained one by the Cholesky factorization theorem. The cost function is defined by the Tikhonov regularization method, and the inverse problem is solved using the damped Gauss-Newton technique, where a meshless method is employed for the direct and sensitivity analyses. To demonstrate the effectiveness of the proposed approach, several examples are presented in the end, where all experimental data are numerically simulated. Analyses of these examples show that all twenty-one elastic constants of an example material can be correctly identified even when measurement errors are relatively large and initial guesses are far from exact values.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Solids and Structures - Volumes 106–107, February 2017, Pages 240-250
نویسندگان
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