Applications are invited for a Ph.D. position in modeling and characterization of polymer thin films at University of Central Florida (UCF). The project is focused on viscoelasticity, yielding, and viscoplasticity of polymer films for superpressure balloon and solar sail applications. A combination of computational, experimental, and analytical methods will be utilized in this research.
Hello all,
I am working on implementing a viscoelastic constitutive model from a hyperelastic stored energy potential (for finite-elasticity) and a dissipation potential (for the viscouls evolution). The elastic constitutive relation, hence derived from the stored energy potential is rate-independent and it is expressed as T(Cauchy's Stress) = f(B), where B is the Left-cauchy green deformation tensor.
The evolution equation is derived out in an objective rate form, which I am integrating over time using a 2nd order accurate explicit method.
My question:
Postdoctoral fellowship @ University of Luxembourg: Complex fluids, FEniCS, Goodyear, optimisation
Very competitive salary
In this study, the intrinsic viscoelastic mechanical behavior of a hierarchical bio-composite, structural bamboo material, was experimentally investigated and correlated with its microstructural constituents and molecular building blocks. The macroscopic viscoelastic responses of bulk bamboo at ambient temperature and dehydrated condition were evaluated through dynamic compression experiments with various loading frequencies, whereas the localized viscoelasticity of bamboo's microstructural phases, viz.
Hello everybody,
My task is to write a UMAT for Non-linear Viscoelasicity based on Schapery's model in ABAQUS. I have coded the routine, but I am still not able to predict correct response. I tried to debug it as much as I can. I understand that it would be difficult for anybody to understand my code. So, I have attached a flowchart (pdf) of the whole algorithm that I follow. It would be nice if you could check that and correct me if I am wrong.
Thanks in advance for your time and consideration
Hello everone
I am recently interested in viscoelastic composite materials with ageing effect. I will be very pleased if someone can advise me how to find a constitutive law with ageing effect.
sincerely
The attached notes are written for a course on plasticity. When I update the notes, I will post a link on my twitter account: https://twitter.com/zhigangsuo.
Dear All,
We (the NanoBIO Node at Illinois ) have a preliminary release of an online finite element analysis of nanoindentation (indentation) tool using FEAP .
This preliminary release is limited to linear elastic material, axisymmetric geometry, spherical rigid indenter, and various boundary conditions.
Dear Colleague: You are cordially invited to participate in the Nanobrücken 2014 Nanomechanical Testing Workshop, which will take place March 26-28, 2014 at INM - Leibniz Institute for New Materials in Saarbrücken, Germany. This will be the 4th edition of the annual Nanobrücken workshop series. This year's Keynote Speaker will be Andrew Minor (University of California, Berkeley).
