欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
针对超声激励对ZTA陶瓷压痕裂纹的影响进行试验研究，从力学角度探究其延性域加工表征的相关机理。通过超声激励作用下的压痕试验及SEN显微观察，对比普通与超声压痕裂纹尖端扩展情况，提出超声激励改变裂纹尖端的几何形态，使得裂纹扩展偏转分叉，而扩展路径的复杂化使得断裂表面能增加，形成能量耗散的增韧机制。经压痕法测得普通情况下的断裂韧性值低于超声振动下的断裂韧性值，约为68％～85％。既印证了超声激励的增韧效果，也从力学理论角度解释了超声加工工程陶瓷材料延性域扩大这一现象。
英文摘要：
Through the experimental study of ultrasonic excitation effect on ZTA ceramics indentation cracks, the related mechanism of ductile mode machining characterization was explored from the perspective of the mechanics. By doing ultrasonic excitation indentation tests and SEM micro observations, the crack geometry of the common indentation was compared with that of the ultrasonic indentation. The geometric shape of crack tip was changed by ultrasonic excitation which makes the crack deflected and branched, and the fracture surface energy was increased by the complexity of the extended path, and thus the toughening mechanism of energy dissipation was formed. Measured by the common indentation, the fracture toughness value is 68%-85% which is lower than the value measured by the ultrasonic excitation. It not only confirms the toughening effect of ultrasonic excitation, but also explains the phenomenon of the ductile expanding of ceramics in the ultrasonic processing engineering from the angle of mechanics theory.
同期刊论文项目
同项目期刊论文
Research on the Surface Quality in Two-Dimensional Ultrasonic Vibration Grinding Based on Fractal Th
Study of carbon/carbon composite material surface morphology on ultrasonic vibration assisted millin
Experimental research on the characteristics of nonlocal elastic kernel function under ultrasonic vi
Research on removal mechanism and surface features of Al2O 3 engineering ceramics in ultrasonic lapp
期刊信息
位置：