Dynamic Elastic-Plastic FEM Analysis of a Circumferentially Notched Specimen with Different Curvature Radius at the Top of Notch 切口尖端不同曲率半径试件的动态有限元分析
The formula on the relationship between the fracture toughness ( K IC) of PMMA and the critical radius ( ρ c) of notch root has been deduced by analyzing the characteristics of stress and strain at notch and crack tip. 根据聚甲基丙烯酸甲脂圆棒试样切口根部及裂尖钝化的应力应变特性,推导了聚甲基丙烯酸甲脂断裂韧性与临界切口半径ρc的关系式。
Conclusion: While the forearm in complete supination, the radius shifts to the dorsal and distal side, and the capitulum ulnae is at the volar side of the notch ulnae. 结论:前臂完全旋后时,桡骨向远侧、背侧移位,尺骨头靠在尺骨切迹的掌侧面。
The influences of the root curvity radius, length, end ellipticity of a notch and the forms, materials of the sample on the failure assessment diagram were totally studied. 较全面地研究了缺口根部曲率半径、缺口长度、缺口端部椭圆率以及试样类型、材料等对失效评定图的影响。
For the notch sensitivity of polymer ABS, the fatigue strength of notched specimens with seven arc radius of notch bottom are determined by "up and down method" and "fitting S-N curve method". 针对聚合物在交变载荷作用下的缺口敏感性问题,本文用升降法和拟合S&N曲线法测定了聚合物ABS具有七种缺口底部圆弧半径的缺口试件的有限疲劳寿命的疲劳强度。