Stress-induced martenstic phase transformation in Cu-Zr nanowires
Hi Friends
I want to share some of our recent research work on the stress induced phase transformation of CuZr nanowire which is published in Materials Letters.
research
Principle of virtual work in case of a large plastic deformation
Hi, all
I have a question about FE formulation for a finite plastic deformation.
I'm a new on the ABAQUS, but how the ABAQUS deals with the plastic deformation
to solve the FE eqation? I think the software use the principle of virtual work and
I'm wondering how the software modify the virtual work term to take the plastic deformation into account (because of dissipation energy)
(Obviously, the formulation must be different with elastic model)
I appreciate your reply.
Continuity in the Plastic Strain Rate and its Influence on Texture Evolution
Classical plasticity models evolve state variables in a spatially independent manner through (local) ordinary differen-
tial equations, such as in the update of the rotation field in crystal plasticity. A continuity condition is derived for the
lattice rotation field from a conservation law for Burgers vector content—a consequence of an averaged field theory
of dislocation mechanics. This results in a nonlocal evolution equation for the lattice rotation field. The continuity
My Eprint papers
Hi,
These are my Eprint papers. Some have already been published as Journal papers, some have not.
I will discuss some of them here someday.
You can link to http://arxiv.org/ and search my name Pi-Gang Luan in Physics [arxive: All], and these papers would be shown to you. There is an exception, my YBE paper ([Colored solutions of Yang-Baxter equation from representations of U_{q}gl(2)] ). In that case you should type [Pi-Gang Luan] instead of Pi-Gang Luan to find the paper.
Numerical Evaluation of Crack Tip Opening Displacement (CTOD)
Hai All,
I want to know how to evaluate CTOD form the finite element nodal
values(displacements) that are obtained from the commercial software
ABAQUS.
I am using Elastic-Plastic model for the analysis. Can anybody help me in this regard.
thanking you in advance,
Regards,
Sivakumar
Bending and 2D Elasticity: Going Back in Time
The following is a (relatively minor) question which had occurred to me more than two decades ago. By now I have forgotten precisely when it was... It could have been when I was in my TE (third year engineering) at COEP. ... Or, perhaps, it was later on, when I as at IIT Madras (studying stress analysis on my own). ... I don't remember precisely when it occurred to me, only *how* it did---it was when I was poring over the first part of Dieter's book.
METAL CUTTING SIMULATION USING DEFORM 2D
Dear All,
I am working on the simulation of the metal cutting process using DEFORM 2D.I need some
guidance on the software usage.How do we vary the feed rate / cutting speed for different
operations.Can you help.I am pursuing my PhD currently.Do you have a working manual of DEFORM 2D for metal cutting.
Wishes ,
VIJAY.
Indentation depth for sphere/limited elastic half-space
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Hello,
My problem is the following:
In clasical Hertz theory I was able to locate indentation depth for the case of sphere/elastic half space, which I will denote as d0. I am interested if there is a relatively simple solution for obtaining indentation depth (d1) if this half-space is limited, that is a sphere in contact with either of these three cases:
1. Semi-infinite cylinder of diameter W (sphere is in contact with the upper cylinder side)
2. Semi-infinite prism of side W (sphere is in contact with the upper prism side)
whirling of shafts
Hello,
I am doing a literature search on this topic. Particularly, I am interested in existing devices and techniques that are used in academia and industry to 1) avoid shaft whirl in rotating machinery under perturbed loads (e.g. rotor systems), 2) to come out of whirling mode if shaft starts whirling, 3) other techniques related to stabilizing shafts in general to reduce the resulting vibrations.
Any help would be greatly appreciated.
Thanks.