Hi all,
Does anyone know how to define nonliner (or exponential) stiffness for cohesive behaviour (for ascending branch before damage)? In CAE it's only allowed to enter one value
Thanks
Mo
Help needed!! in Abaqus
I have UMAT written to update stress and material tangent components for a user defined material model. I need stretch ratio as an input for my material model. For this I am using deformation gradient from UMAT. Problem is, when there is constant strain (strain rate = 0), for example when material stretched to 100% strain (rubber) and then held at that strain for certain time to see stress relaxation, the deformation gradient should give the same value of 100% strain, but to my surprise this is changing. Can any one help me with this.
I would like to share with you our recent paper published in the Journal of Applied Mechanics: J. Appl. Mech. 81(8), 081010 (Jun 02, 2014)
Hello All,
I am trying to make a 2D shell layer on XZ plane. To capture buckling of shell layer with 3-point bending load, I am required to model a 2D sketch on XZ plane. Modeling this way I can use shell elements' bending degrees of freedom. But ABAQUS always pick defauly XY plane to start with.
Does anyone know how to draw a sketch on XZ plane?
Thanks,
Jay Patel
HI,
I'm trying to simlate the buckling behavior of a grpahene sheet using ANSYS APDL 14.5
In my analysis I need to have a graphene sheet that is curved with a variable radius for different cases. I was wondering if there is a faster way to model the graphene sheet assuming that the carbon-carbon bonds are modelled as elastic beam elements( beam 188) and the nodes are represnted by the carbon atoms.
--Naveen R--
Full case study freely available from http://www.journals.elsevier.com/case-studies-in-structural-engineering/recent-articles/ together with other artciles.
You can access all the articles published so far from the journal homepage: http://www.journals.elsevier.com/case-studies-in-construction-materials/recent-articles/
You can also submit your papers, go to: http://www.journals.elsevier.com/case-studies-in-construction-materials/
Phani Motamarri, from the University of Michigan, is the 2014 Melosh Medalist for his paper "A Spectral Finite-Element Based Method For Large-Scale Quantum Mechanical Calculations Using Kohn-Sham Density Functional Theory". Please join me in congratulating Phani!
