education
Mechanics of Soft Active Materials
At the invitation of David Clarke on behalf of the UCSB/Los Alamos Institute of Multiscale Materials and Structures, I gave the following three lectures:
- Large deformation and instability in dielectric elastomers
- Large deformation and instability in swelling polymeric gels
- Mechanics and electrochemistry of polyelectrolyte gels
The abstracts follow, and the slides are attached at the end of this post.
Rotating Beams/Frequencies/Errors/Abaqus input file attached
Im trying to model a rotating uniform beam for 12 rotational speeds in Abaqus using c3d20 elements. As expected, "step 1 to step 5" the frequencies increase as the rotational speed is increased. However, for some strange reason, the frequencies stop varying from the fifth speed. I do get warning messages when running the input file but i cant intepret them well since Im new to Abaqus.
I believe the problem is elementary but i cant figure it out. Can anyone review or run the attached input file to let me know what I am not doing or what exactly is wrong.
Short course FRACTURE, SCALING AND SIZE EFFECT
Scaling of fracture strength, fracture energy and toughness is an important issue when it comes to predicting the behaviour of large-scale structures on the basis of laboratory scale measurements. Historically the work of Leonardo da Vinci and Gallileo is well known, followed by the statistical weakest link theory derived by Weibull in 1939. Weibull scaling is a statistical approach assuming instantaneous failure when the weakest link in a material structure fails.
how to apply cyclic loading in ABAQUS (for determing the DEFORMATION MODULUS from PLATE LOADING TEST down a DRILL HOLE
hi to all,
this is srinivas from IITROORKEE presently doing M.Tech in CIVIL Engg .
my project is
determing the deformation modulus using plate loading test down a drill hole.
Journal paper
Forums
Choose a channel featured in the header of iMechanica
Hi every one,
Iam searching for the paper
" charalambides P.G. ,J. Lund, A.G. Evans and R.M. McMeeking(1989), A test Specimen for determing fracture resistance of bimaterial interfaces . Journal of Applied mechanics, volume :56, pages 77-82. "
Iam unable to find this paper. I need this paper for my thesis work. Is there any one find this copy please attach the copy.
Modeling DCB Specimen using Ansys to determine Energy Release Rate
Hi
Iam working on ansys modelling of DCB specimen to determine the energy release rate. Ihave modeled a CT specimen and determined its SIF. Is it right way to model the DCB by changing the dimensions of CT specimen and making it a DCB specimen?..
How can i find out energy release rate of the specimen?
Iam pretty new to Ansys
THANKS ALL
Problem is using static/riks option
I have some problem in defining the material properties using UMAT. I want to simulate the cubic stress-strain traction-sepration law. Solution doesn't converge after max load is applied (i.e zero slope of stress-strain plot). I am using riks solver. I have written my stress -strain relationship as below in UMAT file. Please tell me how to converge the solution even after zero slope of stress-strain relationship. Can i make my load factor(lambda) negative in riks option.
""STUDY GROUP""
This is a great news for all students here in iMechanica! The formation of a study group which will focus on the basic concepts and the facts of daily research, the simple tools that any of us will need at a certain stage. Please see blow the formation of this idea and add your comment, it would be good to know other points of view as we can improve the initial idea step by step.
Berger on Video Solutions for Teaching Mechanics
Professor Ed Berger, Univeristy of Virginia Mechanical Engineering, is featured in the Chronicle of Higher Education for his use of web technologies and, in particular, "video solutions" for teaching undergraduate mechanics courses.