مهندسی ساخت و تولید ایران

مهندسی ساخت و تولید ایران

طراحی و ساخت یک ساختار آگزتیک هیبریدی نوین پلیمری به روش پرینت سه بعدی با ترکیب ساختارهای سرپیکانی و میسینگ ریب

نوع مقاله : مقاله پژوهشی

نویسنده
گروه مهندسی مکانیک، دانشگاه صنعتی کرمانشاه، کرمانشاه، ایران
چکیده
ساختارهای آگزتیک ساختارهایی پیشرفته هستند که برعکس ساختارهای مرسوم وقتی تحت کشش در یک راستا قرار می‌گیرند، در راستای دیگر به جای باریک شدن، پهن­تر شده و این ویژگی آن ­ها با نسبت پواسون منفی همراه می­شودکه سبب می­شود خواص مکانیکی آن ­ها بهبود یابد. یکی از روش ­های تولید ساختارهای آگزتیک استفاده از فناوری پرینت سه بعدی است که امکان تولید ساختارهای پیچیده و دقیق را فراهم می ­کند. هدف تحقیق حاضر، طراحی و ساخت یک ساختار آگزتیک نوین پلیمری می­ باشد که به وسیله فناوری پرینت سه بعدی ساخته می ­شود. ساختار آگزتیک نوین متشکل از چهار سلول واحد سرپیکانی است که دور یک سلول واحد میسینگ ریب را احاطه کرده ­اند. این ساختار در محیط سالیدورکس طراحی شده و سپس نمونه ­های پرینت سه بعدی با ساختار آگزتیک نوین ارائه شده در تحقیق حاضر تولید گردیدند. نمونه‌های پرینت سه بعدی با ساختار آگزتیک نوین ارائه شده در راستای طولی تحت کرنش ­های مختلف در بازه­ ی 0% تا 25% قرار گرفتند و نتایج نشان داد که نمونه­ ها پس از اعمال کرنش طولی، در راستای عرضی نیز افزایش طول داشته که اثبات می­ کند که ساختار ارائه شده در این تحقیق، یک ساختار آگزتیک است. ساختار آگزتیک نوین ارائه شده در این تحقیق در مقایسه با ساختارهای آگزتیک نوین ارائه شده در تحقیقات پیشین عملکرد مطلوبی را ارائه داد و بیشترین نسبت پواسون آن در کرنش طولی 5% به میزان 0.54- حاصل گردید.
کلیدواژه‌ها

عنوان مقاله English

Designing and manufacturing a novel polymeric hybrid auxetic structure using 3D printing method by combining arrow-head and missing rib structures

نویسنده English

Rezgar Hasanzadeh
Department of Mechanical Engineering, Kermanshah University of Technology, Kermanshah, Iran
چکیده English

Auxetic metastructures are advanced structures that, unlike conventional structures, expand in width when stretched in one direction. This characteristic is associated with a negative Poisson's ratio, which enhances their mechanical properties. One method for creating auxetic structures is through 3D printing technology, which allows for the production of complex and precise designs. The aim of the present study is to design and fabricate a novel polymeric auxetic structure using 3D printing technology. The innovative auxetic structure consists of four arrow-head unit cells surrounding a single missing rib unit cell. This structure was designed in SolidWorks, and subsequently, 3D printed samples of the proposed novel auxetic structure were produced. The 3D printed samples of the novel auxetic structure presented were subjected to longitudinal strains ranging from 0% to 25%. The results demonstrated that the 3D printed samples, after being subjected to longitudinal strain, also exhibited an increase in width, confirming that the structure presented in this research is indeed auxetic. The novel auxetic structure presented in this research showed superior performance compared to the auxetic structures introduced in previous studies, achieving a maximum negative Poisson's ratio of -0.54 at 5% longitudinal strain.

کلیدواژه‌ها English

3D Printing
Polymer
Auxetic
Negative Poisson's Ratio
Metamaterials
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