Blog posts

I am solving a simple solid mechanics problem by meshless method.  use RPIM to  calculate shape function.

when i calculate the derivatives of shape function, i found the derivative is not close to zero at the compute point, when the point is on the boundry of problem domain. and good derivative result can be got if the compute point is in problem domain. 

is there anybody has experience in working with RPIM shape function help me to fix the problem? 

If your research activites are related to modeling the dynamic behaviour of materials then you may consider participating in minisymposium 4.10 at

12th U.S. National Congress on Computational Mechanics

Raleigh, NC (July 22-25, 2013)

http://12.usnccm.org

See attachment for details. The deadline for submitting an abstract is February 28, 2013.

Hi All

 Hope all are doing well. Suppose I have a specimen and I want to find out the Johnson-Cook material model parameters (A, B, C, m, n). Can any one tell me how can I proceed?  Experimental or Numerical simulation??

Thanks in advance

Hi all,

I am working on Abaqus 6.8. I am doing a pile loading
analysis in dense sand. I am not understanding how to plot
load-displacement plot by using static general step. I mean where i
should assign reaction forces and displacement in output request. i have
assigned a set at middle of pile and requested for disp. in output
request also i have made a set of bottom which is fixed and ask for
reation force in output request. i summed up all reaction forces and
combine with displacement. but i am getting zero force and graph becomes

Hello Everyone,

I am a new member of imechanica. I have started to learn UMAT of Abaqus to model my material behavior ( Cu6Sn5, HCP) using crystal plasticity finite element model. I found Dr. Huang's single crystal UMAT to start learning UMAT and I thought that it would be a great guide to start though it is written for FCC mat. But unfortunately I was not able to run the UMAT with it's input file.

Hi.

I'm working  with the element link8 (Ansys 12.1) and I have to
introduced the tensile curve and compression curve, but I don't know,
How I have to introduced its???

I have worked with the comands: TB: aniso, miso,..., I think the best
option is: TB, user, but How I have to introduced the values of tensile
and compression curve?, when this are different.

 File attachment is the tensile and compression curve to introduce

Thank you, Toni 

Hi.

I'm working  with the element link8 (Ansys 12.1) and I have to introduced the tensile curve and compression curve, but I don't know, How I have to introduced its???

I have worked with the comands: TB: aniso, miso,..., I think the best option is: TB, user, but How I have to introduced the values of tensile and compression curve?, when this are different.

 File attachment is the tensile and compression curve to introduce

Thank you, Toni