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The actual deformed shape of a rectangle region D referred to the undeformed configuration due to a concentrated unit moment acting at the origin of the axes. (a) Faulting is formed in the material at the failure of (E) (α=0.5, ε=0.5, δ=0.2, β=0). (b) No localization is observed in the positive definite material (α=0.5, ε=0.5, δ=0.2, β=0.5). (Online version in colour.)
