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  • Users: andrearrd
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  1. andrearrd

    Pre-defined fields

    Hi all, I am really struggling with something for a couple of days now. I have a model and I am trying to restart it using the import analysis. I have to do this since I wish to change BCs and hence cannot use a restart analysis. Some of the model has 3D brick elements, some continuum shell...
  2. andrearrd

    ABAQUS RESTART PROBLEM

    Hi all, I am running a complex dynamic analysis simulating an impact event. I have done this using successive restarts of the same model to overcome the high computational time. Now, I want to load the structure, ie model post impact loading. when i try to do so I get an error saying that...
  3. andrearrd

    Cyclic Symmetry

    Hi, I am trying to analyze a model of a stiffened cylinder. I have run the full model, and are now trying to set up a cyclic symmetry model of 1/8 of the whole cylinder to save computational time as I will eventually do an optimization on it. Ive set up the cyclic symmetry with the...
  4. andrearrd

    Element-by-element properties

    Hi, Is it possible in a model containing solid elements to specify material properties to individual elements (ie poissons ratio and Young's modulus)? I have read about the *distribution and *element properties keywords but these seem to only be applicable with shell elements. Thanks, Andrea
  5. andrearrd

    mass data

    How do I print the model mass data (location of center of mass, moments of inertia etc) for a model to the .dat file? thanks, andrea
  6. andrearrd

    Node numbering

    Hello everyone, I am working on an FE model whcih has a global model which then drives a local model. I am coming up with an error which ive never seen before, as when I run the local model job it says that "the node numbering might not be correct for element # instance 'name'" where # is an...
  7. andrearrd

    SUBMODELING

    Hey guys, I have a question regarding submodeling. I have a complete shell model of a stiffened panel, and have conducted postbuckling analyses of it succesfully. Im now trying to make a local model of a region of this panel. I followed the guidlines in the manual, and as a starting point my...
  8. andrearrd

    Reading data in an external file

    Hi everyone. I am trying to read data from an external file into my ABAQUS input file. i have read up on the *INCLUDE, INPUT= option and understand its function. However, my problem is this: I have a DSLOAD, and the input file is as follows: *DSLOAD __PICKEDSURF33, EDNOR, 0.175 Now, instead...
  9. andrearrd

    homogenizing a composite

    Hi, I have the following problem. I have a certain layup, composed of, for example, 10 plies stacked at different angles (ie a laminate). I have all properties including ply thicknesses. If I have for instance a block of this layup, is there any simple program available that will allow me to...
  10. andrearrd

    coordinate systems

    Hi, I would like to know if it is possible to create a coordinate system that "moves" with a model as it deforms. It is to my understanding that this is not possible, having done a search on this forum on related topics and reading the user guides. If i have, for example, a plate that is in...
  11. andrearrd

    postprocessing

    Hi, My problem is that I am dealing with solid composite secions whose output (eg stress/strain) cannot be viewed using the visualization module of ABAQUS. Am I corect in saying that i need a postprocessor program so that I can, for example, create a .fil file in ABAQUS and then open it in...
  12. andrearrd

    element deletion

    hello everyone, I would greatly appreciate if you could help me on this. I am currently modelling skin -stiffener configurations which undergo debonding. The way im doing this is by creating a layer of cohesive elements between the skin and stiffener parts. these are of composite material...
  13. andrearrd

    field output

    hi everyone, I just wanted to ask another question regarding somethign which is confusing me at the moment. In my ABAQUS model, which consists of two parts with cohesive elements in between, I am unable to get the required output results. I have specified the *element output wtih S, E (strains...
  14. andrearrd

    section controls

    Hello, I am trying to add section controls to some of teh sections i defined in the model. to add the controls im usign teh keywords editor. When I run the job, which works fine without adding teh section control definitions, i get the error relating to a misplaced keyword, and it says that the...
  15. andrearrd

    orphan mesh

    I am very confused about orphan meshes, and would greatly appreciate it if someone cuold help me out. lets say i create an orphan mesh from a part, so then i have the actual part and the orphan mesh. in the subsequent analysis, do i apply loads etc on the part or teh orphan mesh?? do i...
  16. andrearrd

    cohesive elements

    Hi, I have jsut started to use cohesive elements and am very confused. for example consider i have two parts with a cohesive layer in between. I create one part, then create an orphan mesh on that so as to make the cohesive layer. When I assemble the two parts together in the the assembly...
  17. andrearrd

    problem with composite

    Hello everyone, I am using ABAQUS/Standard (6.2) to model a stiffened composite plate under buckling. I create the model in CAE, and then asssume that it is made of a linear elastic material and the buckling eigenvalue analysis works. When i then edit the input file manually, replacing the...
  18. andrearrd

    radial stress

    if i have a cylinder shaped part, with axis 3 pointing in the longitudinal direction , and the 1 and 2 axes define the place whre the circular cross section lies, is ther a way of making ABAQUS show circumferential and radial stresses? Do i have to introduce a cylindrical coordintate system...
  19. andrearrd

    units

    I am really confused about units. For my abaqus part i am using mm, for load N, (thus pressure loadings are N/mm2), and thus as i had read on a thread here density is in tonnes/mm3 to keep the Newton consistent. Now, when i input a hyperelastic material via stress strain data values (uniaxial)...
  20. andrearrd

    explicit.exe

    I am running a contact analysis in explicit (using the kinematic contact algorithm) and I always get an explicit.exe error soon after contact is established. Does anyone know why this is so? Thanks in advance

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