Figure 3.

Normalized energy release rate versus θo = a/2R for Poisson’s ratio ν = 0, 0.1, 1/3, 0.4 and 0.49. The dashed lines show that energy release rate increases linearly with crack length when the crack is small

Long et al. Nanoscale Research Letters 2010 5:1236-1239   doi:10.1007/s11671-010-9625-y