18 Questions 43 Answers 0 Followers
Questions related from Prithivirajan Veerappan
Hello All, I have been trying to restart an ABAQUS simulation using the command line. The following works fine ######## abaqus job=restart1.inp oldjob=OLD user=UMAT.f cpus=160 scratch=$PWD...
03 March 2019 851 5 View
Hello All, Say, I have a huge mesh ( ~ 4 M linear tetrahedron elements) out of which 2 % are distorted. ( Note : Mesh quality is calculated using beta = CR / (3.0 * IR) where CR = circumsphere...
01 January 2019 237 5 View
I would like to create a surface (on top side of a cube) in Abaqus I am aware of doing it manually by using the following in GUI : 1) Tools->Surface-> Create 2) Select regions for surface by the...
01 January 2019 7,519 1 View
Hello All, I am using C3D4 elements for my crystal plasticity analysis using Abaqus. I would like to obtain values of the mesh quality measures ( distortion, jacobian, terta collapse, aspect...
12 December 2018 6,804 2 View
Manually , I do it using the option " by angle" and clicking on the face. But I am looking to automate this as I have to deal with multiple simulations I used the following script : rind =...
06 June 2018 3,270 4 View
Hello,I am working on crystal plasticity finite element simulations of poly-crystalline microstructures with linear elements (C3D4). I have total number of elements in the order of ~ 4 M. I often...
08 August 2017 5,078 5 View
I have an UMAT which combines the thermal expansion with crystal plasticity.Say, I give only thermal expansion in the first step, the geometry expands and settles to some unknown displacement.At...
05 May 2017 8,397 6 View
I am carrying out a coupled thermal-mechanical simulation in Abaqus, using my own UMAT.At the first step, I am just running the thermal case with kinematic constraints.After this step, I obtain...
05 May 2017 3,517 4 View
When we only have mechanical loading, I understand that abaqus calculates the total deformation gradient using F = I + partial_U/partial_X and U = N_i*U_i where U_i is the displacement at the...
04 April 2017 9,618 1 View
I am doing an FE simulation of a polycrystal ( uniaxial). I currently am using C3D8 elements to simulate the same. I would like to reduce the simulation time, Hence I am planning to use a C3D8R (...
04 April 2017 5,125 7 View
Hello all,I would like to enforce a constraint among a group of N nodes in ABAQUS likeUx (node1) = Ux (node 2) = Ux (node 3) = ... = Ux (node N) I have seen a couple of options like kinematic...
03 March 2017 1,295 19 View
I understand that we can do this using a path operation in GUI. But how do we do this using Python ?I have been using Python for quite a while to obtain stress values at the integration...
02 February 2017 4,794 3 View
Hello All, I have an 3D orphan mesh (Abaqus) that I obtained from the Gmsh software. I would like to insert a perfect spherical hole in that mesh. I selected all the elements inside a sphere and...
12 December 2016 541 5 View
For a material in linear elastic regime, the work density is given as 0.5 * σ:ε ( double dot product of stress tensor and strain tensor)Say, a material is undergoing plastic deformation, also...
08 August 2016 1,763 4 View
I can easily get what a residual strain means.I can easily visualize it1) But how do I get a basic understanding of residual stress ? ?Other follow up questions :2) What are are the possible...
08 August 2016 1,004 4 View
One of the fundamental kinematic equation in crystal plasticity is the relation between the velocity gradient and slip rate. [ Please find the equation in the attached figure ] In general terms, L...
08 August 2016 10,035 4 View
I read a few papers wherein the lattice incompatibility is defined mathematically, taking the route of the non closure of the loop in the intermediate configuration and finally arriving at the Nye...
08 August 2016 8,804 0 View
We know that the velocity gradient L = F'F-1 [ F ' is the time derivative of F ] Using multiplicative decomposition, F =FeFp we have , L = F'eFe -1 + Fe F'p Fp -1 Fe -1 = Le + Fe Lp Fe...
08 August 2016 8,974 11 View
