مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

بررسی شکست بین لایه‌ای کامپوزیت‌ (Glass/ABS) پرینت شده با درنظر گرفتن مدل‌ آسیب آماری میکرومکانیکی

نوع مقاله : پژوهشی اصیل

نویسندگان
1 دانشگاه صنعتی سهند تبریز
2 دانشگاه تربیت مدرس
چکیده
در این پژوهش، با استفاده از روش نوین ترکیبی (FDM+Fiber)، کامپوزیت‌های الیاف ممتد ترموپلاستیک (Glass/ABS) به کمک دستگاه پرینتر سه‌بعدی تولید شدند. این تحقیق به بررسی چالش‌های مرتبط با آغشتگی ناقص بین الیاف و ماتریس در کامپوزیت‌های ترموپلاستیک، به‌ویژه نمونه‌های پرینت‌شده، پرداخته است. این نقص ناشی از ایجاد میکروحفره‌های بین‌لایه‌ای است که می‌توانند رفتار مشابه میکروترک‌ها داشته باشند و منجر به کاهش چسبندگی لایه‌ها و افت خواص مکانیکی شوند. علاوه بر این، توزیع احتمالی و تصادفی میکروحفره‌ها نوعی عدم قطعیت در خواص این مواد ایجاد کرده و مسیر رشد ترک اصلی را تحت تأثیر قرار می‌دهد. نوآوری این مطالعه در ارائه مدلی مبتنی بر آسیب آماری میکرومکانیکی و نتایج تجربی برای پیش‌بینی رشد ترک اصلی در این مواد است. در این رابطه از درصدهای تخلخل متفاوتی (10، 20، 30و 40 درصد) با توزیع نرمال، گاما و یکنواخت در حالتهای با و بدون تداخل استفاده شده است. نتایج تجربی و عددی حاکی از آن است که استفاده از مدل‌های آسیب آماری میکرومکانیکی امکان پیش‌بینی دقیقتر رفتار شکست بین‌لایه‌ای کامپوزیت Glass/ABS را فراهم می‌کند
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Investigation of Interlayer Fracture of Printed Composite (Glass/ABS) Considering a Statistical Micromechanical Damage Model

نویسندگان English

Nabi Mehri Khansari 1
salar zare 1
hadi ghorbani 2
1 Assistant professor, sahand university of technology
2 tarbiat moderes university
چکیده English

In this study, using a novel hybrid method (FDM+Fiber), continuous thermoplastic fiber composites (Glass/ABS) was produced using a 3D printer. This study investigated the challenges associated with incomplete impregnation between fibers and matrix in thermoplastic composites, especially printed specimens. This defect is caused by the formation of interlayer micropores that can behave similarly to microcracks and lead to a decrease in layer adhesion and a decrease in mechanical properties. In addition, the probabilistic and random distribution of micropores creates a kind of uncertainty in the properties of these materials and affects the path of the main crack growth. The innovation of this study is in providing a model based on micromechanical statistical damage and experimental results to predict the growth of the main crack in these materials. In this regard, different porosity percentages (10, 20, 30, and 40 percent) with normal, gamma, and uniform distributions have been used in cases with and without interference. Experimental and numerical results indicate that the use of statistical micromechanical damage models allows more accurate prediction of interlayer fracture behavior of Glass/ABS composites

کلیدواژه‌ها English

Fracture mechanics
Continuous Fiber-Reinforced Thermoplastic Composites
Additive Manufacturing
Statistical Damage Model
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