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Hi everybody,

I am a phD student modelling the behaviour of the ceramics under nanoindentation using ABAQUS. I have read that Drucker Prager plasticity model is suitable for ceramics under indentation. To obtain these parameters ABAQUS users manual suggest doing a triaxial test, but I can not find any information relating triaxial test with ceramics (I only find it for soils and rock). Does anybody know another way  to obtain these parameters? Has anybody performed this test experimentally before?

 Thanks,

 Iratxe

hi everybody

i am workin over FGM rotor's dynamic analysis.i am able to formulate the model for it but thing is i am not able to find FGM..i am doing masters in IIT delhi..its my major project ..can anybody pls help me procure fgm (mean i just need a small circular beam ).please help me out..thnak you everybody..

with regards

sandeep kumar

Dear Fellows,

I am trying to develop a new testing method for analysing the interfacial fracture toughness.The problem I face is to create a precrack. 

if I use a stainless steel substrate and TiN or chromium coating on it, which is the best method to create a precrack?

 Please give your sugestions.

Joe ,  Monash University Australia 

hi - i'm new to the site and not familiar with material science in particular, however i'm currently looking for some simulation-software for cellular solids/ porous materials/ foam which allows me to evaluate the differentiation of geometry without too much scripting/programming - could anyone please point me in the direction of software available at a reasonable price (as an academic/student licence)/shareware/freeware which has output formats such as STL (Stereolithography), OBJ, DXF, IGES ..

Many Thanks! 

Could anybody help me out with my problem in ansys magnetic analysis??, Iam trying to do a 3-D magnetic analysis in ansys-10, I have a permenant magnet (a block) on the floor with the N-pole and S-pole along the x axis (x-y plane is the floor), then I have a piece of iron (cylindrical shape) fixed at a height ( in the z direction) to the roof (the magnet is on the floor and the piece of iron is on the roof with a small air gap in between them), please tell me how to simulate the magnetic problem and how to get the magnetic flux density on the iron piece

See the following site:

http://www.edge.org/q2008/q08_index.html

And then, think: If you had to answer the same question, what would your answer be?

(BTW, I know I have quite a few comments to reply here, but somehow have not been able to find time to do so.... I will, soon enough... Anyway, in the meanwhile, wish you all a happy new year... And oh yes, I think it would  be great if mechanicians could share their answers to the above referred question too.)

I have a need to solve huge ( > 1 million ) linear system Ax=b. The matrix is sparse and nonsymmetric. Is there an optimal solver for this type of problems ? If yes, where can I find it ?