مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

بررسی تجربی و عددی شکل‌پذیری ورق آلیاژی آلومینیوم 5083 اتصال‌داده‌شده با جوشکاری اصطکاکی اغتشاشی در فرایند شکل‌دهی تدریجی تک نقطه‌ای

نویسندگان
1 گروه مکانیک- دانشکده مهندسی-امام خمینی - قزوین-ایران
2 استادیار، آزمایشگاه تکنولوژی‌ شکل‌دهی و مواد پیشرفته (AFTAM)، گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه بین‌المللی امام خمینی، قزوین، ایران
3 استادیار، آزمایشگاه تکنولوژی‌ شکل‌دهی و مواد پیشرفته (AFTAM)، گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه بین‌المللی امام خمینی (ره)
چکیده
در این مقاله شکل‌دهی تدریجی تک نقطه‌ای (SPIF) ورق‌های آلیاژی‌ آلومینیوم 5083 که با فرآیند جوشکاری اصطکاکی اغتشاشی (FSW) اتصال داده ‌شده‌اند به صورت تجربی و عددی بررسی شده است. ورق‌‌ها با ضخامت 2 میلی‌متر با سرعت‌ دورانی و پیشروی یکسان جوشکاری شده است. برای بررسی اثر جوشکاری FSW بر شکل پذیری در فرایند SPIF، ورق‌های یکپارچه و ورق‌های FSW شده به‌صورت مخروطی شکل‌دهی شده و حداکثر زاویه دیواره برای هر دو حالت تعیین شده است. نتایج به‌دست‌آمده نشان داد که حداکثر زاویه شکل‌دهی برای ورق FSW شده آلیاژ 5083 با ورق یکپارچه تفاوت زیادی ندارد و جوشکاری اصطکاکی اغتشاشی تأثیر منفی بر شکل‌پذیری ورق ندارد. برای بررسی اثر فرایند SPIF و FSW بر خواص مکانیکی و میکروساختاری ورق آلومینیوم 5083 اثر این دو فرایند بر میکروسختی و اندازه دانه ها تحلیل شده است. در ادامه، فرایند شکل‌دهی تدریجی ورق یکپارچه و ورق FSW شده با نرم‌افزار المان محدود آباکوس مدل‌سازی شده است. پس از صحه‌گذاری شبیه سازی، تأثیر فرایند FSW بر توزیع ضخامت و توزیع کرنش در فرایند شکل‌دهی تدریجی بررسی شده است. نتایج نشان دهنده توزیع ضخامت یکنواخت، توزیع کرنش اصلی یکنواخت و توزیع کرنش فرعی غیریکنواخت در شکل‌دهی نمونه FSW شده است.
کلیدواژه‌ها

عنوان مقاله English

Experimental and numerical investigation of the formability of friction stir welded 5083 aluminum alloy sheets in single point incremental forming process

نویسندگان English

payam tayebi 1
Ali Fazli 2
Parviz Asadi 3
Mahdi Soltanpour 2
1 mechanic department-Engineering faculty- imam khomeini- qazvin- iran
2 Advanced Forming Technology and Materials Lab (AFTAM), Department of Mechanical Engineering, Faculty of Engineering and Technology, Imam Khomeini International University, Qazvin, Iran
3 - Advanced Forming Technology and Materials Lab (AFTAM), Department of Mechanical Engineering, Faculty of Engineering and Technology, Imam Khomeini International University, Qazvin, Iran.
چکیده English

In this paper, the single point incremental forming (SPIF) of friction stir welded (FSWed) 5083 aluminum alloy sheets are investigated experimentally and numerically. The aluminum sheets with 2mm thickness are friction stir welded with the same FSW parameters. In order to obtain the effect of FSW on the formability of SPIF, the base sheets and FSWed sheets are formed to conical shapes with different forming angles and then the limiting wall angles are determined for each condition. The experimental results indicate that the limiting forming angle of FSWed sheet is not so much different than the base sheet and FSW does not have a negative effect on the sheet metal formability in SPIF. To study the effect of SPIF and FSW in mechanical and microstructural properties of the formed parts, the effects of these process on the grain size and micro-hardness is investigated. Furthermore, the incremental forming is numerically simulated using the ABAQUS software and the sheet thickness distribution, obtained from the simulation, is compared with the experimental results. After verification of the numerical simulation model, the effect of FSW on the thickness distribution and strain distribution in SPIF is studied. The results indicate that in weld region and base metal region, the distributions of thickness and major strain are uniform while the distribution of minor strain is non-uniform.

کلیدواژه‌ها English

Incremental forming
formability
Friction Stir Welding
forming angle
thickness distribution
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