There is an open position in the Advanced Tire Technology department in Bridgestone Americas Tire Operations (www.bridgestone-firestone.com). Please see the attached flyer for details and send resume, if interested, to bfpd@bfusa.com

Attached are some (hand-written) observations on wanting to do continuum mechanics when mass is not conserved for fixed sets of particles of the body (so, situations transcending the rocket-losing-mass type). I feel (un)comfortable with these observations, depending upon the day I think about such things.

The primary reason to even consider this is I would like to explore if any physically realistic model can be made in dealing with damage and fracture without assuming that the topology of the mathematical body in 3-d Euclidean space is changed during a motion representative of damage evolution and fracture - of course, in 'reality' the topology changes (or so it seems), but then there are serious difficulties in setting up a *dynamical* model. I am interested in understanding the kinematical apsects of this question clearly as well as the dynamical ones (in this regard, I should mention that I have a reasonable understanding of what gets done in peridynamics and would still like to consider alternatives). 

Perhaps someone on imechanica will straighten me out on these questions.

Discover the NANOMOTION World as an Early Stage Researcher (PhD student) in an EU-wide program on “Nanoelectromechanical Motion in Functional Materials (NANOMOTION)”!

The individual project:

“Finite-element modelling of electromechanically coupled materials”

will be hosted at University of Duisburg-Essen (Germany), www.uni-due.de/mechanika, with secondment to the University College Dublin (Ireland).

Payam Soltani, J. Saberian, R. Bahramian, and A. Farshidianfar

http://fundamentaljournals.org/ijfps/archive.html#A14 

In this Paper, the nonlinear free and force vibration of a single-walled carbon nanotube (SWCNT) with simply supported ends is

investigated based on von Karman’s geometric nonlinearity. The SWCNT described as an individual shell and the Donnell’s

equations of cylindrical shells are used to obtain the governing equations. The Galerkin's procedure is used to discretized partial

(to appear in International Journal of Fracture; Proceedings of the 5th Intl. Symposium on Defect andMaterial Mechanics)

Amit Acharya and Claude Fressengeas

The duality between terminating discontinuities of fields and the incompatibilities of their gradients is used to define a coupled dynamics of the discontinuities of the elastic displacement field and its gradient. The theory goes beyond standard translational and rotational Volterra defects (dislocations and disclinations) by introducing and physically grounding the concept of generalized disclinations in solids without a fundamental rotational kinematic degree of freedom (e.g. directors). All considered incompatibilities have the geometric meaning of a density of lines carrying appropriate topological charge, and a conservation argument provides for natural physical laws for their dynamics. Thermodynamic guidance provides the driving forces conjugate to the kinematic objects characterizing the defect motions, as well as admissible constitutive relations for stress and couple stress. We show that even though 'higher-order' kinematic objects are involved in the specific free energy, couple stresses may not be required in the mechanical description in particular cases. The resulting models are capable of addressing the evolution of defect microstructures under stress with the intent of understanding dislocation plasticity in the presence of phase transformation and grain boundary dynamics.

Hi
all,

I am Mohammad Aramfard senior student of mechanical engineering and I joined this
great forum yesterday, so I am not very familiar with regulations and rules.

Academic Employee (Teaching and Research), Institute of Engineering Mechanics, Chair for Continuum Mechanics, Karlsruhe Institute of Technology (KIT), Germany

The Institute of Engineering Mechanics, Chair for Continuum Mechanics, at KIT offers a vacant position with tasks in both Teaching and Research.

The teaching tasks comprise the tutoring of exercises and practica as well as tutorial office hours. The candidate will work on actual research subjects in the field of continuum mechanics.

A PhD scholarship is available at DTU Mechanical Engineering, Section for Solid Mechanics, in the field of fatigue and wear in rolling and sliding contacts, with focus on computational stress and damage modelling. The department has well-established research activities in this field. The present scholarship is partly funded by the Danish Centre for Knowledge based Engineering for Improved Reliability of Critical Wind turbine Components (REWIND)  supported by the Danish Agency for Science, Technology and Innovation.

Project description

Hi,

I am writing to inform you about a new master in Computational Materials Science offered at TU Bergakademie Freiberg, Germany. It is an international master program, and all the lectures will be given in English.

To enhance multidisciplinary research, the program is open to students from different background, mechanical engineering, solid state physics and materials science.

For further details, please visit the webpage  at  www.imfd.tu-freiberg.de/cms 

Regards,

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

----------------------------------------------------------------------------------

Original post from CISM website:

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

June 27, 2011 — July 1, 2011

Coordinators:

Multiscale computation and modelling of granular materials
 

Granular materials are ubiquitous in nature and extensively utilized in many processes in civil, chemical, mechanical and mining industries.  Understanding and predicting granular material behaviour is vital for migrating natural hazards and for optimising industrial processes.  However, complexity arising from grain interactions poses considerable challenge to this task.  To date, there is no universal theory or model can describe granular material behaviour for a wide range of conditions.

(Journal of Elasticity, Carlson memorial Volume)

A methodology is devised to utilize the statistical mechanical entropy of an isolated, constrained atomistic system to define the dissipative driving-force and energetic fields in continuum thermomechanics. A thermodynamic model of dislocation mechanics is discussed. One outcome is a definition for the mesoscale back-stress tensor and the symmetric, polar dislocation density-dependent, Cauchy stress tensor from atomistic ingredients.