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  1. JulesVerne77

    Problem with pre-tensioned bolt

    sorry brad, I forgot to mention it above.. yes sure, I have sufficient boundary condition for the model in step 1 (but no additional boundary condition for the pre-tension nodes).. When I run the analysis without the pre-tension definition, there is no problem.. but when I add these lines...
  2. JulesVerne77

    Problem with pre-tensioned bolt

    hi, I`d like to perform a nonlinear analysis in ABABUS with pretensioned bolts (made of solid brick elements). The model was created with I-DEAS-Preprocessor. I defined a pre-tensioned section and a pre-tension node for each bolt. The pre-tension nodes are not attached to any element in the...
  3. JulesVerne77

    Combination of Tetrahedron and Hexahedron-Elements ???

    thanks chorus, I will try it..
  4. JulesVerne77

    Combination of Tetrahedron and Hexahedron-Elements ???

    hi, I have to model a structure with a complex geometry.. for first estimations, I used linear brick elements.. now, in the more detailed model, I doubt that these element type will give me good results due to high bending moments at local regions.. Alternatively I can mesh all with tet10...
  5. JulesVerne77

    Combination of Tetrahedron and Hexahedron-Elements ???

    hi, I have to model a structure with a complex geometry.. for first estimations, I used linear brick elements.. now, in the more detailed model, I doubt that these element type will give me good results due to high bending moments at local regions.. Alternatively I can mesh all with tet10...
  6. JulesVerne77

    Conatct analysis with a negative eigenvalue

    thanks corus, you were right.. I found a rigid body motion and I restrained it.. now it works.. bye JV..
  7. JulesVerne77

    Conatct analysis with a negative eigenvalue

    Dear Abaqus users, I have a problem while doing a 3D contact analysis (nonlinear analysis) with Abaqus and thus need your help or suggestions. The model consists of a sandwich plate connected by rivets with an al-bracket. Both of them are deformable. I meshed all with C3D8 elements. I applied...
  8. JulesVerne77

    Export of a model with contact sets in ABAQUS

    I created a model with I-DEAS Preprocessor... the model consists of several parts with a gap between.. I defined contacts sets between the surfaces of these parts and spring elements to remove singuralities.. now my question, if I import this file in ABAQUS for nonlinear static analysis, does...
  9. JulesVerne77

    Importing I-DEAS-Files with Contact Sets

    I created a model in I-DEAS Preprocessor... the model consists of several parts with a gap between.. I defined contacts sets between the surfaces of these parts and spring elements to remove singuralities.. now my question, when I import this file in ABAQUS, does ABAQUS identify this contact...
  10. JulesVerne77

    QUESTION: Static Load Test of a Cut-Out of Large Cylindrical Structure

    @prex, the background is a global static load test to qualify a cylindrical cylinder (material= AL-Honeycomb core (xxx) and CFK facesheets).. the cylinder is fixed to the adjacent upper and lower structure by rivets in a al-bracket (aaa)... ¦xxx¦ Sandwich ¦xxx¦ ¦¦xxx¦¦ ¦¦xxx¦¦...
  11. JulesVerne77

    Contact Sets between surfaces of two separeted parts

    can anyone help me.. i have some problems to define a contact set between the two surfaces of two separate modeled parts.. when I try to add a surface to a region/contact set, I can only choose surfaces of one part.. (surfaces of the other part are not highlighted) what can I do to define the...
  12. JulesVerne77

    QUESTION: Static Load Test of a Cut-Out of Large Cylindrical Structure

    can anyone help me.. we have to arrange a static load test for a large cylindrical structure( R=2000, L=1000,t=30mm), but we are only able to test a cut-out of the cylinder.. in a fe-model we determined the internal force at this location (axial compressive forces, radial an circumferential...

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