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hello im a M-Tech student..i need  help regaring LS DYNA.i want to model a composite plate with the orientations[0/45/-45/90] i want apply the orientations and how to view the orientations of the plies. and i want know how to predict delaminations when it is impacted by a rigid ball...in LS DYNA..plz help me out

Hello All,

I am a Masters Student trying to model a cyst in a Nerve for which i need to obtain large deformation(not displacement) which is not able to model with the help of Finite Element Tools(used Abaqus previously but no success).

 I searched through the Internet and got to know that Meshless Methods are well known for Large Deformation.I found on the web that LSDyna has commercial code of EFG which i feel will be useul to me.

I want to get stiffnes matrix from ANSYS Classic. I used substructure analysis and using list->other-> super element data and got stiffness matrix of whole structure. But I want to get stiffness matrix of individual elements. Can I do it in ANSYS Classic?

DEAR FRIENDS

IS IT POSSIBLE TO MODEL A METAL BLANK UNDER EXPLOSION USING SPH? (IN ORDER TO SIMULATE EXPLOSIVE FORMING OF A HEMISPHERE)

THANKS

hello..can we install the abaqus software with window7...plz tell me...???

HI! All

I am modeling a connection with pre-stressed bolts. When I run my job, it aborted: "Node set assembly__load-1_blrn_ has not been defined

A concentrated load has been specified on node set assembly__load-1_blrn_. This node set is not active in the model"

I think I don't know how to convert a pre-tension surface of bolt to pre-tension node.

Can someone help me to show it clearly?

Thanks alot.

PAnh

Hi everybody,

          Can anybody tell me what is the difference between these two field outputs in ABAQUS?? First one is CPRESS and the other one is PRESSURE which comes under stress output??? Actually I want to know normal pressure for my work. Which one of these two will give me Normal pressure??? Thanks..

I have a very basic question regarding anisotropic materials elastic constants.

The elastic constants must satisfy the condition of the positive definiteness of the stiffness matrix so that the strain energy is guaranteed to be positive for any strain state. However, are there any extra conditions on these constants ?

In particular, can we have a material with shear stiffness higher than the normal stiffness even if the stiffness matrix is still positive definite ?

If so, is there any physical explanation, on the microlevel or something, for this phenomenon ?