A reformulation of strain gradient plasticity

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Well-posedness of a model of strain gradient plasticity for plastically irrotational materials (2008, background): “This is the core of the model proposed by Fleck and Hutchinson (2001) , whose theory extends that of Aifantis (1987) to one in which up to three length scales are accommodated.”
A discontinuous Galerkin formulation for classical and gradient plasticity. Part 2: Algorithms and numerical analysis (2007, background): “A further example would be that of gradient models that involve more than one length scale [54].”
Analysis of the tilted flat punch in couple-stress elasticity (2016, background): “…it is well known that the classical continuum theory possesses no intrinsic length scale and thus fail to predict the scale effects observed experimentally in indentation problems with geometric lengths comparable to the lengths of the material microstructure (e.g. Fleck and Hutchinson, 2001).”
Thermodynamic framework for coupling of non-local viscoplasticity and non-local anisotropic viscodamage for dynamic localization problems using gradient theory (2004, background): “Aifantis, 1992; Zbib and Aifantis, 1992; de Borst and Mu¨ hlhaus, 1992; de Borst et al., 1993; Fleck and Hutchinson, 1997, 2001, Hwang et al., 2003; Wang et al., 2003).”