## Journals

- Advances in Mathematics of Communications
- Big Data & Information Analytics
- Communications on Pure & Applied Analysis
- Discrete & Continuous Dynamical Systems - A
- Discrete & Continuous Dynamical Systems - B
- Discrete & Continuous Dynamical Systems - S
- Evolution Equations & Control Theory
- Foundations of Data Science
- Inverse Problems & Imaging
- Journal of Computational Dynamics
- Journal of Dynamics & Games
- Journal of Geometric Mechanics
- Journal of Industrial & Management Optimization
- Journal of Modern Dynamics
- Kinetic & Related Models
- Mathematical Biosciences & Engineering
- Mathematical Control & Related Fields
- Mathematical Foundations of Computing
- Networks & Heterogeneous Media
- Numerical Algebra, Control & Optimization
- AIMS Mathematics
- Conference Publications
- Electronic Research Announcements
- Mathematics in Engineering

### Open Access Journals

DCDS

A new technique, combining the global energy and entropy balance equations
with the local stability theory for dynamical systems, is used for proving
that every solution to a non-smooth temperature-driven phase separation model
with conserved energy converges pointwise in space to an equilibrium as time
tends to infinity. Three main features are observed: the limit
temperature is uniform in space, there exists a partition of the physical body
into at most three constant limit phases, and the phase separation process has
a hysteresis-like character.

DCDS-B

For a rate independent sweeping process with a time dependent smooth
convex constraint, we prove that the Kurzweil solution for possibly
discontinuous inputs depends locally Lipschitz continuously on the data
in terms of the $BV$-norm.

CPAA

A partial differential equation motivated by electromagnetic field
equations in ferromagnetic media is considered with a relaxed rate
dependent constitutive relation. It is shown that the solutions
converge to the unique solution of the limit parabolic problem with
a rate independent Preisach hysteresis constitutive operator as the
relaxation parameter tends to zero.

DCDS

Rate independent evolutions can be formulated as operators, called
hysteresis operators, between suitable function spaces. In this
paper, we present some results concerning the existence and the
form of directional derivatives and of Hadamard derivatives of
such operators in the scalar case, that is, when the driving
(input) function is a scalar function.

DCDS-S

A structure analysis of the Preisach model in a variational setting is carried out
by means of an auxiliary hyperbolic equation with memory variable playing the role of time,
and amplitude of cycles as spatial variable. Using this representation, we
propose an algorithm and derive error estimates for the identification of the Preisach
density function and for an approximate inversion of the Preisach operator.

DCDS-S

We consider a model for one-dimensional transversal oscillations of
an elastic-ideally plastic beam. It is based on the von Mises model
of plasticity and leads after a dimensional reduction to a
fourth-order partial differential equation with a hysteresis
operator of Prandtl-Ishlinskii type whose weight function is given
explicitly. In this paper, we study the case of clamped beams
involving a kinematic hardening in the stress-strain relation. As
main result, we prove the existence and uniqueness of a weak
solution. The method of proof, based on spatially semidiscrete
approximations, strongly relies on energy dissipation properties of
one-dimensional hysteresis operators.

DCDS-B

Alexei Vadimovich Pokrovskii was an outstanding mathematician, a scientist with very broad mathematical interests, and
a pioneer in the mathematical theory of systems with hysteresis. He died unexpectedly on September 1, 2010 at the age 62.
For the previous nine years he had been Professor and Head of Applied Mathematics at University College Cork in Ireland.

For more information please click the “Full Text” above

For more information please click the “Full Text” above

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DCDS-B

We consider a system of operator equations involving play and Prandtl-Ishlinskii hysteresis operators.
This system generalizes the classical mechanical models of elastoplasticity, friction and fatigue by introducing coupling
between the operators. We show that under quite general assumptions the coupled system is equivalent
to one effective Prandtl-Ishlinskii operator or, more precisely, to
a discontinuous extension of the Prandtl-Ishlinskii operator based on the Kurzweil integral of the derivative
of the state function. This effective operator is described constructively in terms of the parameters
of the coupled system. Our result is based on a substitution formula which we prove for the Kurzweil integral of regulated functions integrated with respect to functions of bounded variation.
This formula allows us to prove the composition rule for the generalized (discontinuous) Prandtl-Ishlinskii
operators. The composition rule, which underpins the analysis of the
coupled model, then establishes that
a composition of generalized Prandtl-Ishlinskii operators is also a generalized Prandtl-Ishlinskii operator provided that a monotonicity condition is satisfied.

DCDS

A phase-field system, non-local in space and non-smooth in time, with heat flux
proportional to the gradient of the inverse temperature, is shown to admit
a unique strong thermodynamically consistent solution on the whole time axis.
The temperature remains globally bounded both from above and from below,
and its space gradient as well as the time derivative of the order parameter
asymptotically vanish in $L^2$-norm as time tends to infinity.

DCDS-B

This paper is concerned with an optimal control problem for a system
of ordinary differential equations with rate independent hysteresis
modelled as a rate independent evolution variational inequality
with a closed convex constraint $Z\subset \mathbb{R}^m$.
We prove existence of optimal solutions as well as necessary optimality
conditions of first order. In particular, under certain regularity
assumptions we completely characterize the jump behaviour of the adjoint.

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