Fig. Single-edge notched tension
test. crack phase-field contour plot for \(\mathbf{n}\mathbf{=1.5}\)and \(\mathbf{n}\mathbf{=1.8}\) (quite similar) in various stages
In Fig.4, for smaller values of n , the curve becomes more
unstable at the end and drops with more steeply, and failure occurs
suddenly. In this situation, the cracks may deviate from the straight
path and grow in the wrong direction. Hence, the use of larger values ofn can lead to more accurate results.