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  1. greauxpete

    local failure (triaxial stress) check at every node

    Apparently solid works 2015 added a stress plot for sum of the principal stresses. Ironic. Now all I need is the local failure nodal strain check for elasto plastic analysis.
  2. greauxpete

    local failure (triaxial stress) check at every node

    Asme section viii div 2 and api 6a require a local failure (triaxial stress) at every node is checked. This means the sum of the principal stresses must be less than 4Sm (For linear fea). Is there a more efficient way to export these stresses or perhaps create a custom stress plot? Exporting...
  3. greauxpete

    Simulation of Nozzles for Fatigue (ASME VIII-2)

    I have seen methods used where the stress is linearized at the toe of the weld (area of max stress),and the membrane + bending stress is used to calculate the number of stress cycles. The mesh was checked for sufficient convergence at the toe of the weld by making sure at least one element on...
  4. greauxpete

    Working under related P.E. apply?

    I didn't have any problems using my father, who was my supervising professional. Best decision I ever made was to work with my dad; he taught me how to be a professional, the importance of protecting clients (sometimes from themselves), engineering, and how to run a business. I also was...
  5. greauxpete

    Aluminum Angles in Bending/Flexure (Lateral Torsional Buckling)

    I am trying to design an aluminum angle in bending/flexure. The aluminum Association 2005 looks at: 1. Local buckling of leg tip in max compression (which I understand) 2. Leg in uniform compression (which I understand) 3. Yielding for flange in compression at various orientations. Not sure I...
  6. greauxpete

    9th Edition - Design Question for HSS tubes classified as "Slender"

    Here is the Mathcad attachment.http://files.engineering.com/getfile.aspx?folder=0ee255fb-0414-45c9-a5f4-d78a6617169b&file=Mathcad_-_AISC_8th_and_9th_Edition_Tubing_Bending_Analysis.pdf
  7. greauxpete

    9th Edition - Design Question for HSS tubes classified as "Slender"

    Hello, I was wondering if you someone could help with a design issue I am having with TU8x8x3/16. The tube is classified as a “Slender” tube due to the high b/t ratio when compared to values in the AISC Manual 8th and 9th edition. I have figured it out in the 13th edition (its more straight...
  8. greauxpete

    Compare RISA-3D to CosmosWorks using Beam Elements

    I use both and prefer RISA to Cosmos when dealign with standard structural shapes. Cosmos is better for components with weird geometry or weird restraints/ loads. I still try to do hand calcs in Mathcad where possible.
  9. greauxpete

    Using Cosmos FEA (Shells) for ASME Section VIII Div 2 Pressure Vessel

    My boss is a PE and he checks my work. He has 30 of experience with the design, fabrication and testing of ASME vessels. However, we occasionally run into a situation where an FEA analysis is required. The ASME code is not very helpful (in my opinion) with dealing with stresses reported in...
  10. greauxpete

    Using Cosmos FEA (Shells) for ASME Section VIII Div 2 Pressure Vessel

    corus, Thanks for the advice. What section of ASME is the diagram? I looked through it and did not see a diagram fo a vessel, but I did see a table that list examples of stress at different locations on the vessel. I assume this will serve the same purpose. I woul dlike to see the daigram you...
  11. greauxpete

    Using Cosmos FEA (Shells) for ASME Section VIII Div 2 Pressure Vessel

    Hello, I am trying to use Cosmosworks FEA to analyze a pressure vessel using shell elements. The vessel R/t ratio is 150. The I-beam thickness is also "thin" compared to the width and height R/t = 15. Am I correct in using shells for this analysis? The vessel includes only internal pressure...
  12. greauxpete

    Eccentric Load on Flange of W-Shape

    I ran into a similar problem this week - I ended up using an FEA analysis to solve the problem. Do you have acess to FEA software? I thought about treating the flange of the beam as a cantilevered beam (with flange connection at the web being restrained)to see what kind of stresses I would...

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