281 citations · 921 across the 53 of their papers we have counts for
8 papers · 1 filter
The modified indeterminate couple stress model: Why Yang et al.'s arguments motivating a symmetric couple stress tensor contain a gap and why the couple stress tensor may be chosen symmetric nevertheless
Ingo Münch, Patrizio Neff, Angela Madeo +1
We show that the reasoning in favor of a symmetric couple stress tensor in Yang et al.'s introduction of the modified couple stress theory contains a gap, but we present a reasonab…
An ellipticity domain for the distortional Hencky-logarithmic strain energy
Ionel-Dumitrel Ghiba, Patrizio Neff, Robert J. Martin
We describe ellipticity domains for the isochoric elastic energy $ F\mapsto \|{\rm dev}_n\log U\|^2=\bigg\|\log \frac{\sqrt{F^TF}}{(\det F)^{1/n}}\bigg\|^2 =\frac{1}{4}\,\bigg\|\lo…
Rank-one convexity implies polyconvexity for isotropic, objective and isochoric elastic energies in the two-dimensional case
Robert J. Martin, Ionel-Dumitrel Ghiba, Patrizio Neff
We show that in the two-dimensional case, every objective, isotropic and isochoric energy function which is rank-one convex on is already polyconvex on $\mathrm{…
A new view on boundary conditions in the Grioli-Koiter-Mindlin-Toupin indeterminate couple stress model
Angela Madeo, Ionel-Dumitrel Ghiba, Patrizio Neff +1
In this paper we consider the Grioli-Koiter-Mindlin-Toupin linear isotropic indeterminate couple stress model. Our main aim is to show that, up to now, the boundary conditions have…
On some fundamental misunderstandings in the indeterminate couple stress model. A comment on recent papers of A.R. Hadjesfandiari and G.F. Dargush
Patrizio Neff, Ingo Münch, Ionel-Dumitrel Ghiba +1
In a series of papers which are either published [A.R. Hadjesfandiari and G.F. Dargush, Couple stress theory for solids, Int. J. Solids Struct. 48, 2496-2510, 2011; A.R. Hadjesfand…
A variant of the linear isotropic indeterminate couple stress model with symmetric local force-stress, symmetric nonlocal force-stress, symmetric couple-stresses and complete traction boundary conditions
Ionel-Dumitrel Ghiba, Patrizio Neff, Angela Madeo +1
In this paper we venture a new look at the linear isotropic indeterminate couple stress model in the general framework of second gradient elasticity and we propose a new alternativ…
Correct traction boundary conditions in the indeterminate couple stress model
Patrizio Neff, Ionel-Dumitrel Ghiba, Angela Madeo +1
In this paper we consider the Grioli-Koiter-Mindlin-Toupin indeterminatecouple stress model. The main aim is to show that the traction boundary conditions were not yet completely d…
The exponentiated Hencky-logarithmic strain energy. Improvement of planar polyconvexity
Ionel-Dumitrel Ghiba, Patrizio Neff, Miroslav Silhavy
In this paper we improve the result about the polyconvexity of the energies from the family of isotropic volumetric-isochoric decoupled strain exponentiated Hencky energies defined…