مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

پیش بینی خواص مکانیکی و شکست سازه مشبک الهام گرفته از لانه زنبور و دی ان ای تحت بار کششی

نوع مقاله : پژوهشی اصیل

نویسندگان
دانشگاه تربیت مدرس
چکیده
در این مقاله یک ساختار مشبک جدید با شکل سلول واحد الهام گرفته از ترکیب ساختار لانه­زنبور و دی‌ان‌ای مرکز سلول­ جانداران ابداع و از ماده پی‌ال‌ای (pla) ساخته شد که در راستای X و Y تحت آزمون کشش قرار گرفت و همچنین یک روش جدید تحلیلی_عددی با استفاده از تئوری تیر تموشنکو، روابط مقاومت مصالح و اجزاء محدود برای بدست آوردن خواص مکانیکی و پیش­بینی شکست سازه­های مشبک ارائه شد که با استفاده از نرم­افزار تجاری آباکوس روش گفته شده صحه سنجی شد. در بررسی­ها مشاهده شد هرچقدر نسبت ضخامت به طول المان در سازه مشبک به تئوری تیرها یعنی نسبت 1 10 نزدیکتر باشد نتایج دقیق­تر خواهد بود و ساختار سلولی با شکل سلول واحد ابداعی هنگامی که تحت کشش در راستای x قرار می­گیرد قابلیت تحمل بار %7 بیشتر، حداکثر تنش تسلیم %8 بیشتر و سفتی معادل %75 کمتر از حالتی که تحت کشش در راستای Y قرار می‌گیرد را دارد.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Prediction of Mechanical Properties and Failure of Honeycomb and DNA Inspired Mesh Structure under Tensile Load

نویسندگان English

ali dolatshahi
hossein toozandehjani
amin farrokhabadi
Tarbiat Modares University
چکیده English

This study introduces a novel lattice structure, whose unit cell design draws inspiration from the fusion of honeycomb patterns and the DNA found at the core of cells, constructed from PLA material. This structure underwent tensile testing along the X and Y axes. Additionally, the paper presents a new analytical-numerical approach that combines Timoshenko beam theory, mechanics of materials principles, and finite element analysis to determine the mechanical properties and forecast failure in cellular structures. This method was corroborated using the ABAQUS commercial software. Research indicated that a closer ratio of thickness to unit cell length, specifically 1/10, leads to more precise predictions for the mechanical behavior of the cellular structure under tension along the X axis. The findings showed that, in comparison to the Y axis, the X direction exhibited a 7% increase in load-bearing capacity and an 8% increase in maximum yield stress, yet the equivalent stiffness was 75% lower

کلیدواژه‌ها English

Cellular Structure
Lattice Structure
Failure Prediction
Finite element
experimental method
Numerical method
مراجع
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