Numerical implementation of static Field Dislocation Mechanics theory for periodic media
R. Brenner A. J. Beaudoin P. Suquet A. Acharya
(to appear in Philosophical Magazine)
Position is not any more available ---- Research position at TU Darmstadt, Germany
At the Division of Mechanics
of Functional Materials in the institute of Materials Science, TU Darmstadt the
following research position is to be filled as soon as possible:
Research position (E 13 TV – TU
Darmstadt), Postdoc/Doctoral Candidate
The position is
scheduled for three years.
Tasks and Opportunities
Postdoctoral Researcher in Computational Mechanics of Composite Materials at IMDEA Materials
The research group of Structural Composites at IMDEA Materials (Madrid, Spain), led by Dr. Cláudio S. Lopes and Dr. Carlos González, invites applications for a Postdoctoral Fellow in the field of multiscale computational analysis of composite structures. Candidates with strong background knowledge on computational damage mechanics, model development, and on numerical simulation of advanced composite materials and structures are strongly encouraged to apply. Experience in experimental mechanical testing of composites is highly valued.
relation between the Euler-Lagrange strain tensor and the 2nd Piola-Kirchhoff stress tensor
At finite deformations, the 2nd Piola-Kirchhoff stress tensor S_{IJ} is work-conjugate to the Euler-Lagrange strain tensor E_{IJ}, i.e. the work done by the stress S_{IJ} at developing a strain E_{IJ} per unit volume in the reference configuration is
W = 1/2 S_{IJ} E_{IJ} (Einstein summation over repeated indices implied)
I would like to express this in the same form as used in linear elasticity, i.e. to write S_{IJ} = M_{IJKL} E_{KL}, which would give me
W = 1/2 M_{IJKL} E_{IJ} E_{KL}
2nd Annual Mach Conference, Annapolis MD, April 9-11,2014
The Mach Conference showcases the state of the art of multiscale research in materials, with an emphasis on advancing the fundamental science and engineering of materials and structures in extreme environments.
Abstracts are due January 6, 2014. For more information, please go to the conference website machconference.org.
a JKR theory of adhesion for anisotropic solids
Jim Barber and I just got accepted this paper in JMPS, and it is also already available on Arxiv. We found a remarkably simple closed form solution for adhesion on orthotropic materials in the planes of symmetry. This shows adhesion can increase significantly due to anisotropy, namely the JKR solution continues to hold in the sense of mean elastic modulus, but the prefactor can grow without limit. We expect applications in crystals indentation, but also in locomotion in biological world.
Minisymposium on MULTISCALE COMPUTATIONAL MECHANICS OF MICRO- AND NANO- COMPOSITE MATERIALS
The above minisymposium is organised
at the 11th World Congress on Computational Mechanics in Barcelona
(Spain), July 20 - 25, 2014 (http://www.wccm-eccm-ecfd2014.org/frontal/default.asp).
More details on the minisymposium can be
found in the enclosed PDF by following the link: http://www.wccm-eccm-ecfd2014.org/admin/Files/FileAbstract/A268.pdf