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مدل‌سازی رفتار شکست ورق آلومینیوم آلیاژی 6061-T6با استفاده از یک معیار شکست پدیدارشناختی | ||
| مدل سازی در مهندسی | ||
| دوره 23، شماره ویژه 81، تیر 1404، صفحه 33-48 اصل مقاله (1.27 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22075/jme.2024.34841.2708 | ||
| نویسنده | ||
| علی زاهدی* | ||
| دانشکده مهندسی مواد، ساخت و تولید، دانشگاه محقق اردبیلی، اردبیل، ایران | ||
| تاریخ دریافت: 03 مرداد 1403، تاریخ بازنگری: 01 آبان 1403، تاریخ پذیرش: 13 آذر 1403 | ||
| چکیده | ||
| توسعه ابزارهای لازم برای پیش‌بینی رفتار پلاستیک و شکست ورق فلزی از موضوعات مهم در حوزه شکل‌دهی ورق است. در این پژوهش، رفتار شکست ورق آلیاژی آلومینیومی 6061-T6 با استفاده از آزمون‌های کشش یک محوری آزمایشگاهی و همچنین شبیه‌سازی عددی در نرم‌افزار آباکوس تحلیل و بررسی شده است. برای بررسی رفتار شکست، از مدل شکست پدیدارشناختی جدید کواچ استفاده شده و با کمک زیر برنامه VUSDFLD این معیار شکست به نرم‌افزار آباکوس معرفی شده است. به منظور تعیین ضرایب ماده این معیار شکست، سه هندسه متفاوت طراحی شده و در آزمایش‌های تجربی و شبیه‌سازی‌های عددی استفاده شده است. نتایج به دست آمده نشان می‌دهد هندسه‌های طراحی شده، طیف قابل توجهی از تنش سه محوری و پارامتر لود را ایجاد می‌کنند. با روش هیبرید تجربی-عددی و کمینه‌سازی تابع خطای تعریف شده، این مدل شکست برای ورق آلومینیومی 6061-T6 کالیبره گردید. همچنین از مدل شکست کالیبره شده شکست در تست کشش یک هندسه جدید طراحی شده نیز ارزیابی گردید. نتایج به دست آمده نشان دهنده انطباق ارتفاع شکست و موقعیت شکست پیش‌بینی‌شده با نتایج تجربی است. | ||
| کلیدواژه‌ها | ||
| مدل شکست؛ کالیبراسیون؛ ورق فلزی؛ المان محدود؛ تنش سه محوری | ||
| عنوان مقاله [English] | ||
| Fracture Behavior Modeling of 6061-T6 Aluminum Alloy Sheet Using a Phenomenological Failure Criterion | ||
| نویسندگان [English] | ||
| Ali Zahedi | ||
| Department of Materials and Manufacturing, University of Mohaghegh Ardabili, Adabil, Iran | ||
| چکیده [English] | ||
| Developing the necessary tools to predict the plastic behavior and failure of sheet metal is one of the important issues in the field of sheet metal forming. In this research, the fracture behavior of the 6061-T6 aluminum alloy sheet has been analyzed and investigated using experimental uniaxial tensile tests as well as numerical simulation in Abaqus software. To investigate the failure behavior, the new Quach phenomenological fracture model was coded using the VUSDFLD subroutine and introduced to the Abaqus. Three different geometries have been designed and used in experimental tests and numerical simulations to determine the material constants of the criterion. The results show that the designed geometries create a wide range of triaxial stress and Lode parameters. With the experimental-numerical hybrid method and the minimization of the defined error function, the fracture model was calibrated for the 6061-T6 aluminum sheet. Also, using the calibrated fracture model, the failure in the tensile test of a newly designed geometry was evaluated. The results show a close agreement between the predicted fracture height and fracture location compared to the experimental observations. | ||
| کلیدواژه‌ها [English] | ||
| Fracture model, Calibration, Sheet metal, Finite element, Triaxiality stress | ||
| مراجع | ||
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