hi, there!
I have read a "Manual for LS-DYNA Wood Material Model 143"(website: http://www.tfhrc.gov/safety/pubs/04097/sec150.htm#toc_1_5_1 and http://www.tfhrc.gov/safety/pubs/04097/append_e.htm).
I have two question:
Hello, everyone.
Recently, I am trying to build a plastic contact model to describe teh relationship between the plastic deformation and the contact force, which is a crucial point in my work that dealing with the grasp force in robotics. So, anybody has some ideas about this? Actually, I am attempting to find a analytic model.
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(in Journal of the Mechanics and Physics of Solids)
I came upon a recent paper called "Deformation gradients for continuum mechanical analysis of atomistic simulations" by Jonathan A. Zimmerman , Douglas J. Bammann, and Huajian Gao, International Journal of Solids and Structures 46 (2009) 238–253 where the authors conclude with
Hello,
I am doing numerical simulation using ABAQUS 6.7. I faced some problem to apply load that will be used as the forced displacement in one face of our model.I used user subroutine for appling load.But, i don't know how to apply forced displacement means the command of forced displacement.
Could you please help me regarding this problem.
Regards,
Arefin
My name is Aurelio Tronci and I am a PhD student at the University of Cagliari (Italy). My research topics are related to friction stir welding (FSW). The work done so far has focused on the application of the DOE technique in order to investigate the influence of welding parameters on the microstructural and mechanical properties of aluminum alloys (AA 2198 T3-T8) joints. At the moment I am interested in the development of a thermo-mechanical model of FSW with CFD, but I find it really difficult to find material constants (Sellars and Tegart law) for all the alloys I have to test.
|
INELASTICITY OF MATERIALS- An Engineering Approach and a Practical Guide
by Arun R Srinivasa (Texas A&M University, USA) & Sivakumar M Srinivasan (Indian Institute of Technology, Madras, India) |
Article on web
http://www.eng-tips.com/faqs.cfm?fid=1441
The physical basis of material
properties like Young's modulus can be understood by examining
materials on the atomic scale. There are two main things that influence
the value of the modulus:
1.) The atomic microstructure
2.) The interatomic bonds.
I have a question regarding the experimental determination of rate independent phenomenological elaso plastic constitutive model.
Since the models are rate independent, does the strain rate in the experiments used to calibrate the model parametes have any influence on the model. I am talking about this in context to the Cap plasticity model used in Abaqus. One has to run a certain number of powder compaction experiments to calibrate the model.
