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Modeling and Simulation of Strain-mediated Nanostructure Formation on Surface

Submitted by fengliu on

In this chapter of "Hankbook of Theoretical and Computational Nanotechnology", I will provide an overview of the progress made in the last decade on theoretical modeling and computer simulation of strain-mediated formation of nanostructures on surface, focusing on strain-induced self-assembly and self-organization of two-dimensional (2D) patterns and structures. As part of a handbook, the main objective of the chapter is not to provide an extensive literature review on the topic. Instead, I will try to provide a general introduction and overview of the basic concepts and physical models along with some relatively detailed discussion of mathematical derivations and technical treatments so that readers (especially graduate students) who are interested in this topic can use this chapter as a guide and reference to start their own modeling and simulation.

6th International Conference on Mechanics of Time-Dependent Materials 2008, Monterey, CA, short/tentative abstracts due March 20

Submitted by H Jerry Qi on

We invite you to submit an abstract for the 6th international conference on Mechanics of Time-Dependent Materials, to be held at the Portola Plaza Hotel, Monterey CA, March 30 - April 1, 2008. The conference is held in coordination with the journal of the same name. (Profs. Igor Emri and Wolfgang Knauss, editors-in-chief.)  The hotel overlooks beautiful Monterey Bay. The program will feature: several distinguished plenary speakers addressing a selection of the described topics; a day highlighting US and international governmental support with keynote by Dr.

6th International Conference on Mechanics of Time-Dependent Materials 2008, Monterey, CA, short/tentative abstracts due March 20

Submitted by H Jerry Qi on

We invite you to submit an abstract for the 6th international conference on Mechanics of Time-Dependent Materials, to be held at the Portola Plaza Hotel, Monterey CA, March 30 - April 1, 2008. The conference is held in coordination with the journal of the same name. (Profs. Igor Emri and Wolfgang Knauss, editors-in-chief.)  The hotel overlooks beautiful Monterey Bay. The program will feature: several distinguished plenary speakers addressing a selection of the described topics; a day highlighting US and international governmental support with keynote by Dr. Janez Potocnik, Commissioner for Science and Research for the European Union; an extensive sightseeing excursion in the beautiful Monterey peninsula region.

We are soliciting papers involving constitutive, time (rate)-dependent behavior of all materials. The time-dependent mechanical response should be non-negligible in cases involving non-mechanical fields. Papers dealing with modeling and experimental aspects of the subject area are sought. Possible topics include, but are not limited to: characterization and modeling of behavior at multiple scales; viscoelasticity, viscoplasticity; transport, chemically and electronically active processes; multiphase and biomaterial systems; thermodynamics; shape memory; mechanics of testing; micro/nanoindentation on time-dependent materials; dynamic rate-dependent behaviors; large deformations; residual stresses; time (rate)-dependent damage and failure; time (rate)-dependent polycrystalline, single crystal and nanocrystalline behaviors; multifunctional materials; mechanics of processing; design methods; environmental interactions; experimental methods and techniques; linear and non-linear time-dependent behavior; time (rate)-dependent composite materials of all types; numerical analysis; physical aging; rheological properties; temperature, pressure, and moisture effects on time dependence; damping; related topics. A short/tentative abstract indicating your intent to attend must be submitted by March 20, 2007, to the conference website: http://www.ae.utexas.edu/MTDM08/  

Rolling Moment Resistance of Particles on Surfaces

Submitted by Cetin Cetinkaya on

In the brief presentation attached, I am summarizing my lab's recent work in the field of adhesion and work-of-adhesion measurements, and hoping to see who else is working in the field.  Here is some intro to the topic (by no means, it is complete - maybe we can add some recent work to this list as discussions develop)

Split singularities and dislocation injection in strained silicon

Submitted by Martijn Feron on

By Martijn Feron, Zhen Zhang and Zhigang Suo

The mobility of charge carriers in silicon can be significantly increased when silicon is subject to a field of strain.In a microelectronic device, however, the strain field may be intensified at a sharp feature, such as an edge or a corner, injecting dislocations into silicon and ultimately failing the device. The strain field at an edge is singular, and is often a linear superposition of two modes of different exponents. We characterize the relative contribution of the two modes by a mode angle, and determine the critical slip systems as the amplitude of the load increases. We calculate the critical residual stress in a thin-film stripe bonded on a silicon substrate.

To the students of ES 242r / ENGM 940

Submitted by Zhigang Suo on

Thank you very much for taking this course. Some of the assignments of
the course will be done on iMechanica. The main purposes of these assignments are

  • to expose students to resources for life-long learning, and
  • to facilitate interactions among students who are taking the course from three campuses (Harvard, MIT and Nebraska).

Please take the following quick steps now.

IINTERMEDIATE MECHANICS OF MATERIALS

Submitted by Jim Barber on

J.R.BARBER: INTERMEDIATE MECHANICS OF MATERIALS

Many of you may know my book on Elasticity, but may not be aware that I also wrote an undergraduate book on Intermediate Mechanics of Materials (Published by McGraw-Hill - ISBN 0-07-232519-4). This picks up from the typical elementary Mechanics of Materials course and deals with the next range of topics such as energy methods, elastic-plastic bending, bending of axisymmetric cylindrical shells and axisymmetric thick-walled cylinders. A full Table of Contents and the Preface are given below.