Abstract

In this research, the prevalent mode fracture of V-notches with end holes (VO-notch) in tungsten–copper functionally graded material (W–Cu FGM) was studied experimentally and theoretically. W–Cu FGM specimens were made by powder metallurgy technique in the experimental part. Several fracture tests were done on VO-notched W–Cu FGM specimens under prevalent mode loading for different notch tip radii and notch depths. To predict the fracture loads of VO-notched FGM specimens under prevalent mode loading, the averaged strain energy density over a well-defined control volume was applied in the theoretical section. Moreover, the effect of notch tip radius, notch depth and notch opening angle on the fracture loads was investigated. This study shows that strain energy density theory works well on VO-notched FGM specimens under prevalent mode loading.

中文翻译：

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钨-铜功能梯度材料制成的带VO切口的样品的普遍模式II断裂研究

摘要

在这项研究中，通过实验和理论研究了钨-铜功能梯度材料（W-Cu FGM）中带有端孔的V型缺口（VO缺口）的普遍模式断裂。W-Cu FGM试样是通过粉末冶金技术在实验部分制成的。在不同模式的缺口尖端半径和缺口深度的普遍模式载荷下，对带有VO缺口的W-Cu FGM试样进行了几次断裂试验。为了预测在普通模式载荷下带V切口的FGM试样的断裂载荷，在理论部分应用了定义明确的控制体积上的平均应变能密度。此外，研究了切口尖端半径，切口深度和切口开口角度对断裂载荷的影响。这项研究表明，应变能密度理论在VO缺口FGM试样在普遍模式载荷下工作良好。