Ask iMechanica

Hi friends

I have two errors in my simulating ,with this massage:





2 nodes are missing degree of freedoms. The MPC/Equation/kinematic coupling constraints can not be formed. The nodes have been identified in node set ErrNodeMissingDofConstrDef.



Analysis Input File Processor exited with an error.



I checked all constraints in those two nodes, and I am sure that I created these constraints like others, but I cannot understand what is the problem?

Also there is a warning:

Hello freinds 

I am simulating a bridge with beam elements, here i should put a beam on the other one with out any conection

now how I could creat this kind of constraint ?

Thanks alot

Dear all,

I have a plate with side length a>b. which is subjected to a in-plane bending moment M in the center.

Can you help me how to get the formula on calculating the Max. stress ?

Thanks.

Hello, I have been trying to get some help with regards to Abaqus, hope someone in the community can help me with this..



I am doing a fatigue thermal analysis of an electronic flip chip undergoing thermal cycles. I am using a slice model of the chip and there is a particular boundary condition that I do not know how to apply in ABAQUS. 

Dear all,

One of the consistency conditions of
the Ogden model is that sum(μ)= initial classic shear modulus. To
apply this condition, I need to calculate slope of stress-strain
curve (of an experimental dataset). I do not know up to which level of
strain I can consider this curve as a linear elastic model to find E
(that can be used to calculate shear modulus).

I’ve seen in one book this can be
considered for e<3%. Unfortunately I could not remember which book
was that. Do you know a standard for this
assumption?

Hi everybody,

 I am a very beginnerin doing research :-) and my topic is about "micro indentation analysis using continuum dislocation theory". I am applying high-order finite element method for this nonlinear problem.

Hi All,

I have a problem that I need to take in to account the elastic, thermal and plastic strains (with isotropic hardening). Temperature is changing and the corresponding material properties (elastic, plastic) are temperature dependent. This can be done in Abaqus without using subroutines. As I should add some other features I need to write an UMAT.

Dear colleagues 

During the analysis of my projects, I always monitor the procedure. I encountered a strange warning which was not shown in error or warning tab in the monitiring part, but when I check the data file I saw it! you can see the warning in following:

" 

     ***NOTE:       84 SLAVE NODES INVOLVED IN *TIE CONSTRAINT

               HAVE BEEN ADJUSTED. FOR MORE DETAILED INFORMATION ON