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پیش‌بینی لهیدگی داخلی طالبی با مدل غیرخطی المان محدود به‌کمک نرم‌افزار آباکوس | ||
| مهندسی بیوسیستم ایران | ||
| مقاله 7، دوره 46، شماره 1، فروردین 1394، صفحه 47-55 اصل مقاله (608.77 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/ijbse.2015.54336 | ||
| نویسندگان | ||
| اسماعیل سیدآبادی1؛ مهدی خجسته پور* 2؛ حسن صدرنیا3 | ||
| 1مربی دانشکدۀ کشاورزی، دانشگاه زابل | ||
| 2دانشیار گروه ماشین‌های کشاورزی دانشگاه فردوسی مشهد | ||
| 3استادیار گروه ماشین‌های کشاورزی دانشگاه فردوسی مشهد | ||
| چکیده | ||
| در میوۀ طالبی به‌دلیل پوست نسبتاً سخت و گوشت نرم آن، لهیدگی بافت‌های داخلی شایع‌ترین نوع آسیب مکانیکی است که در ظاهر قابل‌تشخیص نیست و پیش‌بینی آن به روش‌های تحلیلی سخت است. از حل غیرخطی مسئلۀ بارگذاری استاتیکی میوه در جهت طولی بین دو صفحۀ موازی با روش المان محدود و با نرم‌افزار آباکوس (ABAQUS) برای پیش‌بینی لهیدگی داخلی طالبی استفاده شد. تغییر شکل‌های اعمال‌شده به مدل 5/5، 11، و 5/16 میلی‌متر معادل 10، 20، و 30 درصد تغییر شکل تخریب بود. تحلیل تنش‌های وارد بر پوست و گوشت میوه نشان داد که بافت داخلی میوه در 20 درصد تغییر شکل تخریب یا نیروی معادل 90 نیوتن به حد تسلیم رسیده است و گسیختگی داخلی آغاز می‌شود و این حالت در ظاهر میوه قابل رؤیت نیست. رابطۀ قوی بین نیروی پیش‌بینی‌شده توسط مدل المان محدود و نیروی واقعی را تصدیق کرد. | ||
| کلیدواژه‌ها | ||
| آسیب مکانیکی؛ روش المان محدود؛ مدل‌سازی غیرخطی؛ میوۀ طالبی؛ نرم‌افزار آباکوس | ||
| عنوان مقاله [English] | ||
| Prediction of Internal Bruising in Cantaloupe by Nonlinear FEM Model Using ABAQUS Software | ||
| نویسندگان [English] | ||
| Esmaeel Seyedabadi1؛ Mahdi Khojastehpour2؛ Hasan Sadrnia3 | ||
| 1Lecturer,Department of Agronomy, University of Zabol, Zabol, Iran | ||
| 2Associate Professor, Department of Agricultural Engineering, Ferdowsi University of Mashhad, Mashhad, Iran | ||
| 3Assistant Professor, Department of Agricultural Engineering, Ferdowsi University of Mashhad, Mashhad, Iran | ||
| چکیده [English] | ||
| Mechanical damagesin theprocessof harvestingandpost-harvest are the most important reason in Cucurbits losses. It causes the tissue destructionand consequentfruits decay. Because of difference in the mechanical strength of flesh and skin of cantaloupe, internal bruising are more usual damages with no visibility. This type of injuriesis hard to predict byanalytical methods. In this study,the mechanical properties of skin and flesh were determined by individual experiments and then finite element model was developed by ABAQUS software. The applied displacements on model were equal to 5.5, 11 and 16.5 mm or 10, 20 and 30% of final deformation, respectively. The analytical results showedthat the internal tissue of fruit got to yield in 20%of whole displacementor in 90N force and the internal failure were occurred that it was not visible in the surface of fruit. The model was verified by the comparison of force-displacement graph from experimental data and FEM results. High correlation (R2=0.983) between the predicted force and the actual force showed the validity of FEM model. | ||
| کلیدواژه‌ها [English] | ||
| Mechanical damage, Finite Element Method, Nonlinear Modeling, ABAQUS Software, cantaloupe | ||
| مراجع | ||
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