Hi!!
We generally encounter governing equations of even order. In FE formulation we get a symmetric coefficient matrix 'A' (AX = B). I have a few doubts as follwing.
[a] Any odd order governig equations ? If so, you may please write.
[b] Say, it has a functional also, then, what's the order of that differentiation?
hi, everybody
i am going to simulate crack propagate by ABAQUS, but i haven't used ABAQUS before.
now i have two problems:
1) can abaqus calculate the velocity of crack advancing?
2)FGM(functionally graded materials ). material property varies at
different position,such as density ,modulus, possion ration. can
abaqus deal with this problem by umat .
thanks.
A cohesive law for carbon nanotube/polymer interfaces based on the van der Waals force (JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS 54 (11): 2436-2452 NOV 2006)
Authors: Jiang, L.Y., Huang, Y., Jiang, H., Ravichandran, G., Gao, H., Hwang, K.C. and Liu, B.
Dear Researchers and Industry Engineers,
In this letter I am looking for some comments and industrial supports for my PhD research on non-contact measurement for machinery maintenance.
Our paper on the Mechanical threshold stress (MTS) model for 6061-T6 aluminum has been accepted by JoMMS. There are several things of interest in the paper:
1) The use of a phonon drag model to predict the sharp increase in flow stress at strain rates above 10,000 /s. This behavior is seen in a number of materials and is hard to fit using standard power law plasticity models. Our model does a good job in this regard.
If you are a faculty member on the tenure-track or a post-doc it's a good idea to chair a few minisymposia at conferences to buttress your resume. Here's an opportunity for you:
Via: Lori Graham-Brady
Hello every body,
As most of you know, fracture mechanics of polymer materials needs a special consideration of the viscoelastic material properties. Especially under thermomechanical loading the role of glass transition temperature T_g is very important. That is why people try to characterize the material with different methods including stress relaxation based on Time-Temperature superposition or DMA test.
