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تحلیل بیومکانیکی مدل اجزای محدود ستون فقرات کمری تحت بارگذاریهای مختلف | ||
| نشریه مهندسی مکانیک امیرکبیر | ||
| دوره 56، شماره 11، بهمن 1403، صفحه 1475-1496 اصل مقاله (1.51 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/mej.2025.23781.7812 | ||
| نویسندگان | ||
| علی کمالی؛ لاله فتاحی* ؛ علیرضا نعیمی فرد | ||
| گروه مهندسی مکانیک، دانشکده مهندسی، دانشگاه شهید چمران اهواز، اهواز، ایران | ||
| چکیده | ||
| بدن انسان طی فعالیتهای روزمره تحت نیروها و گشتاورهای متعددی قرار دارد. یکی از مهمترین اندامهای بدن به منظور تحمل این نیروها، ستون فقرات است که متشکل از مهرههای متناوب و دیسکهای بینمهرهای بوده و توسط رباطها و ماهیچهها استحکام مییابد. ستون فقرات قابلیت خم شدن رو به جلو و عقب، خمش جانبی و پیچش محوری را دارد و به همین دلیل در معرض آسیبهای متعددی قرار دارد. از این رو، مدلسازی و تحلیل عددی ستون فقرات و محاسبه نیروها و تنشهای ایجاد شده در آن در شرایط مختلف از اهمیت بالایی در پیشگیری از آسیبهای احتمالی ستون فقرات برخوردار است. در پژوهش حاضر یک مدل اجزای محدود صحتسنجی شده از بخش انتهایی ستون فقرات کمری انسان شامل دو مهره L4 و L5 و دیسک بینمهرهای بههمراه صفحات انتهایی و رباطها ارائه میشود. لازم به ذکر است که مهرههای انتهایی ستون فقرات از جمله شایعترین مکان دردهای کمری است و در این پژوهش نیز جهت بررسی آسیب در اثر بارگذاریهای مختلف در این بخش، مقادیر تنش و کرنش ایجاد شده با مقادیر تسلیم بافت موردنظر مقایسه شده و وقوع آسیب بررسی میگردد. | ||
| کلیدواژهها | ||
| ستون فقرات کمری؛ تحلیل بیومکانیکی؛ روش اجزای محدود؛ تحلیل تنش؛ پیشبینی آسیب | ||
| عنوان مقاله [English] | ||
| Biomechanical analysis of the lumbar spine under different loading conditions | ||
| نویسندگان [English] | ||
| Ali Kamali؛ Laleh Fatahi؛ Ali Reza Naeimifard | ||
| Department of Mechanical Engineering, Engineering Faculty, Shahid Chamran University of Ahvaz, Iran | ||
| چکیده [English] | ||
| The human body is exposed to many forces and moments during daily activities. The spine is one of the most important structures that bear these forces and may be prone to multiple injuries. Therefore, numerical modeling and analysis of the lumbar spine under various loading conditions is very beneficial to prevent injuries. This study aims to provide a valid finite element model of the L4-L5 segment of the human lumbar spine for static analysis. The model includes two vertebrae, intervertebral discs, end plates, and ligaments. To model the mechanical properties of the lumbar spine, elastic and hyperelastic behaviors have been used for different parts of the spine. Moreover, stress and strain distribution in different tissues, under various loading conditions, were compared with the allowable thresholds of the tissues to investigate the possibility of tissue damage. Note that it was assumed that tissue damage occurs when the stresses and strains in the desired tissue exceed the elastic range. However, based on the obtained results, under the investigated loading conditions, none of the model components were damaged. | ||
| کلیدواژهها [English] | ||
| Lumbar Spine, Biomechanical Analysis, Finite Element Method, Stress Analysis, Injury Prediction | ||
| مراجع | ||
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