CISM Course: Plasticity and Beyond

Dear all,

please find information about the 5 day - course on Plasticity and Microstructures at CISM Udine, Italy.

The link is:

http://www.cism.it/courses/C1104/

Flyer is attached.

Best regards,

Mubeen

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Original post from CISM website:

Plasticity and Beyond: Microstructures, Crystal-Plasticity and Phase Transitions

June 27, 2011 — July 1, 2011

Coordinators:

• Klaus Hackl
  (Ruhr University Bochum, Bochum, Germany)
• Joerg Schroeder
  (University of Duisburg-Essen, Essen, Germany)

Plasticity is a key phenomenon for a large class of materials with a
variety of applications in science and technology. In the last few
decades several phenomenological theories have been developed in order
to describe the mechanics and thermodynamics of such processes on the
macroscopic level. Nevertheless, these “classic” models have reached
their limits in various respects. Extensions of these models should
take into account the formation of microstructures and the
microheterogeneity of the underlying multiphase materials. The
macroscopic response functions are determined by appropriate averages
of microscopically associated field quantities over evolving
microstructures.
The role of microstructures becomes more and more noticeable with a
decreasing size of the material specimen considered. Scale-effects play
a major role in modern micromechanical applications. Microstructure is
indeed crucial, since plastic behavior typically is the result of the
interaction of complex substructures on several length scales. The
macroscopic behavior is then determined by appropriate averages over
the (evolving) microstructure.
What is needed are models which are more closely related to physics and
material science and which are able to take into account the
microstructural behavior of the material. These models rely strongly on
variational formulations for which effective mathematical and numerical
concepts have been developed only recently.
Modern engineering applications require the reduction of structure
weight while improving safety properties. Therefore, advanced high
strength steels play an important role since they offer solutions to
these demands. Due to their micro-heterogeneity high strength steels
pose outstanding challenges with respect to material modeling. In order
to capture the complex interplay between the individual constituents a
multi-scale modeling technique has to be applied. In a first approach
an applicable numerical tool for the direct incorporation of these
micromechanical information is the FE2-method (two-scale approach). A
main problem of such direct homogenization methods applied to large
random microstructures is the high computational cost with respect to
both, the amount of memory and the computation time. Therefore, the
construction of statistically similar representative volume elements
(SSRVEs), which are characterized by much less complexity than usual
random RVEs is applied to overcome this drawback.
The aim of the course is to join world leading experts in the area of
experimental plasticity, crystal plasticity, phase transitions,
advanced mathematical modeling and multi-scale modeling. The course is
organized so as to approach the above mentioned problems from different
perspectives.
Modeling techniques: They will cover concepts of classic and extended
continuum thermodynamics, phase-field modeling, higher-order models
like gradient plasticity or micropolar models at finite deformations.
The associated algorithmic treatments are mainly based on finite
element formulations for standard (local approach) as well as for
non-standard (non-local approach) continua and for pure macroscopic as
well as for directly coupled two-scale boundary value problems.
Applications: The course will cover some of the most important
application areas in material design/processing ranging from grain
boundary effects in polycrystals and phase transitions to deep-drawing
of multiphase steels by directly taking into account random
microstructures.
The course is addressed to Doctoral students, young researchers.
A problem for young scientists trying to do high level research in this
area is the number of topics one has to be familiar with: Experimental
observations, continuum thermodynamics, crystal physics, dislocation
theory, phase transition, generalized convexity analysis and formation
of microstructures, phase-field-modeling, multi-scale modeling, and the
algorithmic modeling of this highly non-linear processes. For a
significant progress, high quality research and innovative applications
it is important to know the essentials in these fields and their
respective interplay. Furthermore, there are neither adequate textbooks
nor advanced courses at research/university level available.
The aim of this CISM course is to fill this gap.