مهندسی ساخت و تولید ایران

مهندسی ساخت و تولید ایران

مطالعه تجربی اثر پارامترهای چاپ سه‌بعدی و عملیات آنیل کردن بر میزان جذب انرژی ویژه ساختارهای متخلخل با تخلخل‌های به‌هم‌پیوسته از جنس پلی لاکتیک اسید و چاپ سه‌بعدی شده به روش لایه نشانی ذوبی

نوع مقاله : مقاله پژوهشی

نویسندگان
دانشکده مهندسی مکانیک، دانشگاه صنعتی سیرجان، کرمان، ایران
چکیده
فرایندهای ساخت افزایشی فناوری‌های پیشرفته‌ای هستند که تولید قطعات با هندسه‌های پیچیده را امکان‌پذیر می‌کنند. یکی از مهم‌ترین این فرایندها، فرایند لایه نشانی ذوبی است. یکی از کاربردهای فرایند لایه نشانی ذوبی در صنایع پزشکی ساخت داربست‌های استخوانی است. هدف از این پژوهش بررسی اثر پارامترهای فرایند لایه نشانی ذوبی و عملیات حرارتی آنیل کردن بر میزان جذب انرژی ویژه ساختارهای متخلخل با تخلخل‌های به‌هم‌پیوسته، جهت استفاده به‌عنوان داربست‌های استخوانی در مهندسی بافت است. نمونه‌ها از جنس پلی لاکتیک اسید چاپ سه‌بعدی می‌شوند. پارامترهای مورد بررسی عرض روزن‌رانی، ارتفاع لایه، درصد پر شدن، الگوی پر شدن است. نمونه‌ها با سه الگوی شبکه‌ای، لرزشی و لانه‌زنبوری و با درصدهای پر شدن 40، 70 و حداکثر چاپ می‌شوند. جهت ایجاد یک ساختار متخلخل با تخلخل‌های به‌هم‌پیوسته، هر لایه به میزان 18 درجه حول محور قائم دوران می‌کند. علاوه بر بررسی اثر پارامترهای چاپ، اثر عملیات آنیل کردن نیز بر روی میزان جذب انرژی ویژه نمونه‌ها بررسی می‌گردد. نتایج حاصل‌شده نشان داد که عرض روزن‌رانی و عملیات حرارتی بیشترین تأثیر بر میزان جذب انرژی ویژه را داشته و عملیات آنیل کردن تا حداکثر 35 درصد می‌تواند موجب افزایش میزان جذب انرژی ویژه در نمونه‌ها شود. حداکثر میزان جذب انرژی ویژه به مقدار 36.2 کیلوژول بر گرم برای نمونه آنیل شده با پارامترهای چاپ: عرض روزن‌رانی 0.8 میلی‌متر، ارتفاع لایه 0.2 میلی‌متر، درصد پر شدن حداکثر، الگوی پر شدن شبکه‌ای است.
کلیدواژه‌ها

عنوان مقاله English

Experimental study of the effect of 3D printing parameters and annealing process on the specific energy absorption of porous structures with interconnected pores fabricated of polylactic acid and 3D printed by fused deposition modeling method

نویسندگان English

Behnam Akhoundi
Amin Safi Jahanshahi
Department of Mechanical Engineering, Sirjan University of Technology, Kerman, Iran
چکیده English

Additive manufacturing processes are advanced technologies that enable the production of parts with complex geometries. One of the most important of these processes is the fused deposition modeling process. One of the applications of the fused deposition modeling process in the medical industry is the manufacture of bone scaffolds. This study investigates the effect of fused deposition process parameters and annealing heat treatment on the specific energy absorption of porous structures with interconnected porosities for use as bone scaffolds in tissue engineering. The samples are 3D printed from polylactic acid. The parameters studied are extrusion width, layer height, infill percentage, and infill pattern. The samples are printed with three patterns: grid, wiggle, and honeycomb, with filling percentages of 40, 70, and maximum. To create a porous structure with interconnected porosities, each layer rotates 18 degrees around the vertical axis. In addition to investigating the effect of printing parameters, the effect of annealing heat treatment on the specific energy absorption of the samples is also investigated. The results showed that the extrusion width and heat treatment have the greatest effect on the specific energy absorption, and annealing can increase the specific energy absorption in the samples by up to 35%. The maximum specific energy absorption is 36.2 KJ/g for the annealed sample with the printing parameters: extrusion width of 0.8 mm, layer height of 0.2 mm, maximum infill percentage, and grid infill pattern.

کلیدواژه‌ها English

Additive Manufacturing
Fused Deposition Modeling
Specific Energy Absorption
3D Printing Parameters
Annealing
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