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| 1 | Non-Destructive Testing of Structures Using Optical and Other Methods: A Review显示文摘Non-destructive testing (NDT) of structures is one of the most important tasksof the proper maintenance and diagnosis of machines and constructions structuralcondition. NDT methods contribute to the damage tolerance philosophy used in theaircraft design methodology as well as many other operation and maintenance programsof machinery and constructions. The following study is focusing on overviewing animportant group of NDT methods: the optical and other ones, which found broadapplicability in scientific and industrial studies nowadays. The paper discusses theselected most widely applicable methods, namely, visual testing, ultrasonic testing,radiographic testing, infrared thermography as well as electronic speckle patterninterferometry and shearographic testing. Besides the basic principles of testing usingthese methods, their potential applications in various industrial and technologicalbranches are broadly discussed. The analysis as categorization of the NDT methodsprovided in this paper may help in selection of such methods in diagnosis of varioustypes of structures and defects and damage occurring in these structures. | A.Kroworz A.Katunin | 2018 | Structural Durability & Health Monitoring2018，12，1： | 0 |
| 2 | 汽车空心齿轮轴闭塞式锻造工艺仿真与优化显示文摘为了改善汽车空心齿轮轴的成形质量和尺寸精度、提高生产效率、控制成本,提出采用闭塞式锻造工艺成形该齿轮轴。通过有限元分析方法,对锻造成形过程进行了仿真计算,通过材料流动分析选定了合适的锻模结构方案,即4冲头结构方案,并在此基础上对各冲头的运动方式进行了研究,以各模具承受的载荷、表面温度和成形后零件的质量为研究对象,对工艺方案进行了优化。结果显示:当冲头的运动方式为方案B时,能够有效地降低空心齿轮轴产生裂纹的概率,提高成形质量,同时所需的最小合模力最小,模具表面温升最不明显,有利于延长模具寿命。最后,完成了空心齿轮轴锻件的试制,所得锻件充型完整,斜齿质量好,其结构尺寸达到了设计要求。 | 霍天枢 潘鸣宇 | 2023 | 锻压技术2023，48，6： | 0 |
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