کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1563741 | 999619 | 2007 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Size effects on the deformation behaviour of W–Cu composites under shear loading Size effects on the deformation behaviour of W–Cu composites under shear loading](/preview/png/1563741.png)
Tungsten/copper (W/Cu) particle reinforced composites were used to investigate the scaling effects on the deformation behaviour under shear loading. The effects of the deformed volume on the degree of deformation and on the fracture behaviour were studied. W/Cu-80/20, 70/30 and 60/40 wt.% each with tungsten particle sizes of 10 μm and 30 μm were tested under shear loading using axis-symmetric hat-shaped shear specimens with different shear zone widths. The mechanical tests were done at different shear strain rates (dγ/dt = 0.01 s−1, 1 s−1 and 100 s−1) and temperatures (T = 20–800 °C). Clear scaling effects in terms of high stress level, higher strain up to fracture and shear localization were observed in shear specimens with a small shear zone width. Strain rate sensitivity was determined at higher strain rates. The development of deformation and damage within the shear zone was followed by step loading and FE-simulation. The FE-simulation was done on the real microstructure of the whole shear zone. The results of the FE-simulation were comparable with the experiment.
Journal: Computational Materials Science - Volume 39, Issue 1, March 2007, Pages 219–223