I don't know if my understanding of the following is correct, so I would appreciate your comments. I have an expression for Gibbs free energy of a material G=G(σ,T,...). Is it correct to derive the equation for strain as ε=∂G/∂σ ?
hi friends,
I have coded for laminate using matlab. for further analysis i want code for composite plate simply supported at all 4 edges.
then analyse with ANSYS. and use optimization techniques for optimizing the plate.
material : Graphite /eposy
thickness of each lamina : 0.127
Seq [45 0 -45]
Please anybody know how to code for composite plate and do stress analysis using Ansys.
feel free to share ur thoughts
My name is Bash Phd in colorado school of mines and I am newbie in soil modeling and I just started my PhD study months ago. I am experimentally and numerically studying the stress distribution undernath the padfoot roller at the first stage, I need to have a constitutive model for soil with both dilatancy and hardening behaviors.
Dear Colleagues:
I am pleased to inform you that the papers to be published in International Journal of Applied Mechanics (IJAM) Vol.1 No.2 will be online available soon.
IJAM Vol.1 No.2:
1. “Postbuckling Of Nano Rods/Tubes Based On Nonlocal Beam Theory”, C. M. Wang (National University of Singapore); Y. Xiang (University of Western Sydney); S. Kitipornchai (City University of Hong Kong).
I was wondering what are the advantages of damage mechanics and fracture mechanics over each other? Specially in order to model the delamination phenomenon.
I am trying to perform postbuckling analysis of plates in ANSYS. But something confuses my mind. After linear buckling analysis I use scaled firtst buckling mode shape to generate initial imperfections. Then I initiate nonlinear geometric analysis by NLGEOM command. Collapse load or final converged iteration changes according to NSUBST option. I am trying to give higher Substep to obtain more sensitive and reliable results like 10000. But NSUBST with 100 sometimes reaches higher loads than using 10000. Which one is a correct approach?
Could anyone help me?
Hi. I'm now starting my PhD on a project on sintering of hard metal.
I'm doing a literature study, but I have failed to find any articles that uses FE analysis on the micro/mesoscale. All of them seems to handle this only with a homogenized model on the macroscale.
If I get to be picky, I would prefer something with hardmetal, but at this point, anything would be great.
I would also be very happy to find any suitable reading on FE-analysis on solid-liquid-pore mixtures.
I am already PhD candidate of Mechanical Engineering in Southern Methodist University, Dallas, Texas. I am looking for a postdoc position with an emphasis on laser material processing. You may access my CV by:
A new section has been added to the website on failure criteria for engineering materials. This new work displays many different three-dimensional computer graphics of failure criteria surfaces in stress space. The full range of isotropic materials are covered from ductile metals to brittle ceramics and glasses and beyond. All of these computer generated graphics can be seen at www.failurecriteria.com/failuresurfacegr.html.
Hi All
I am trying to implement a composite material model in vumat. So far, I
have been successful in getting the correct results for a cube for both
tension and compression with the cube being modeled with just one
element (C3D8R)
But when, i model the same cube (side 40mm) with 125 elements,
subjected to the same bc's, with the same material parameters, i get an
error that the element is undergoing excessive distortion.
I am specifying a density of 1.52e-9 ton/mm3.
