Fig. 6

Square plate with a centred crack, \(a/W=0.5\): a \(\sigma _{xx}\)-stress, b \(\sigma _{yy}\)-stress, c \(\sigma _{xy}\)-stress
Square plate with a centred crack, \(a/W=0.5\): a \(\sigma _{xx}\)-stress, b \(\sigma _{yy}\)-stress, c \(\sigma _{xy}\)-stress