توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Effect of Load Direction on fracture type in tibia An FEM Analysis
نویسنده(ها): ، ، ،
اطلاعات انتشار: هفدهمین کنفرانس مهندسی پزشکی ایران، سال
تعداد صفحات: ۵
Abstract—The main purpose of this research was to predict the site and type of fracture in the tibial shaft under transversal and torsional impacts, using FEA In this research, tibia was supposed to act as an elasticcorticalshell with transversely isotropic symmetry. Effects of the spongy bone were ignored because of its much lower stiffness than the cortical shell. Results of stress contours were in agreement with those previously obtained by experimental works, i.e. in cases of loading medially, laterally and dorsally mostly direct fracture mechanism was seen with transverse, oblique and wedge shaped fracture patterns while an indirect mechanism was created byventrally loading with a pattern of oblique fracture lines >30°. Spiral fracture pattern was observed by loading a torsional moment. Prediction of the fracture type and its propagation patterns in the tibial shaft were highly comparable to the radiography images taken from injured bones of pedestrians and experimental impact loadings of real bone by other researchers.<\div>

۲Effects of additional holes diameter on transient thermal fatigue life
نویسنده(ها): ، ،
اطلاعات انتشار: اولین کنفرانس بین‌المللی مهندسی مکانیک و هوافضا، سال
تعداد صفحات: ۵
A series of finite element models were conducted in ASTM– A395 elastic– perfectly plastic ductile cast iron to investigate the effect of additional holes diameter on the transient thermal fatigue behavior of single hole specimens containing hole edge cracks. The Abaqus finite element package was used to modeling. The Abaqus data file for the uncracked mesh was read and processed by Zencrack fracture mechanics code. The energy release rate was used to drive crack growth calculations. Then it was discussed how the reduction of transient thermal stress distribution around the basic single hole affected the transient thermal fatigue life of the single hole specimens. The results show that transient thermal fatigue life and stress distribution factor at the edge of a base hole was affected by variations in diameter of the additional holes. The results from the numerical predictions are compared with experimental data<\div>
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