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Found 4 results

  1. Hello everyone, Currently I am doing an optimization and I get Error 312, which states that there is a Problem with the stiffness. The Displacement is huge to be exact. So, to find the Problem I checked all the BC`s and the material but coud not find anything. I created a new model just to check if an simple analysis would work and it did not get the Error but here is the Problem: the displacement is 2.07e+08 in two directions. I can not find the source for this mistake. The material is the standard steel with 210000 E-Modulus with card Image MAT1. NU and RHO are defined as well. The cube has a side length of 100mm. I created two Load Collectors, one for the Constraint and one for the Force and one Loadstep, both do not have Card Images. The Mesh is a SolidMap and the Property is PSOLID. Where could this error come from? tbh I am not very aware of Card Images and which ones to use. Thank you all.
  2. Hello! I want to measure the volume of a solid. I know I can find this in Tool --> Mass Calc I am interested in measuring the volume with more numerical precicion. Is there a way of increasing this? For example i would like to read more numbers beyond 2.781 as the image shows. Thank you
  3. Sir can you tell me ,how can i calculate th6 NODED 11 MEMBERS TRUSS.hme weight of members of the optimised truss in the result window?I am attaching my file for you.
  4. Hello, I'm to optimize an CFRP drive shaft for an formula student race car. The shaft itself is produced in a winding process. The tulips of the homokinetic joints are glued into the ends of the shaft. For that I created a model with a PCOMPP property and a laminate with 4 plies. The tulips are simplified as rod elements with HyperBeam tubesections and PROD properties with characteristical values of aluminium. The measurements are: length of the shaft: ca. 300 mm inner diameter: 65 mm laminate thickness: 8 mm length of the rods: 80 mm inner diameter of the tulips: 45 mm If I run an analysis of the model and check the out.file, the mass is calculated as about 1350g. If I run the free-size optimization afterwards, the mass before the first iteration is calculated as 1270g. I don't understand why the two values aren't the same. Is the calculated mass in the analysis the mass of the tulips and the shaft an the mass before the free-size optimization only the mass of the shaft because of the objective function? I don't really get, why there is a difference. Because the mass of the tulips should be about 600g and not 100g. The objective funktion ist minmass and the contraints are set by the displacement of the nodes of one end of the shaft.
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