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  • Users: Transient1
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  1. Transient1

    Selecting a Molder / The Right Questions to Ask

    Without naming any names, I got a quote from someone that seems too good to be true. I am new to the plastic industry and this is a project I am working solo on. I have two questions: 1) Is there a forum with customer feedback somewhere? 2) What are the most important questions to ask the...
  2. Transient1

    Handling Manufacturing Drawing Workflow

    The situation is this: I start with a block of material that is machined in house. It is sent out for specialized machining to vendor A. Then it comes back and is sent for specialized machining to Vendor B. Then it comes back and is finished in house. What's the best way to handle this...
  3. Transient1

    Erosional Velocity in Molybdenum and Tungsten/Copper-Infiltrated

    Hi all, I'm trying to find resources discussing maximum fluid velocity of water in Moly or Tungsten. The actual tungsten material is 90% Tungsten infiltrated with 10% copper. So I'm considering limiting the fluid flow to copper limits for that material. Any references on either and if not, how...
  4. Transient1

    2007 Sec. VIII Div 1 and 2 BPVC E-beam welds and Ultrasonic Inspection

    Does anyone know why 100% ultrasonic inspection is mandated for e-beam welds?
  5. Transient1

    ASME B&PV Section VIII, Division II, Weld Inspections

    I am trying to find if in Division II there are exceptions that allow me to be exempt from NDE on e-beam welds. I have data that shows repeatable quality welds but it looks like 100% Ultrasonic Testing is always required. Assume I am only talking about Category A, Circumferential welds.
  6. Transient1

    ASME online B & PV code course for Sec VIII Div 2

    Has anyone taken one of the web based courses from the ASME? If so, what did you think of it? My understanding is that the course is completely text based; it requires that you read through the material on your own. I am not sure if there is any added value compared to reading through the code...
  7. Transient1

    PE Exam- Question about bringing Reference books

    So it says that all personal items must be in a clear plastic bag. Does that go for reference books too? I'm thinking its gonna be a pain to find a clear backpack before Friday. I'm taking the exam in NY state.
  8. Transient1

    Question on Equations for Calculating Forming Strains

    In the 2007 edition of the code, the first equation which pertains to one piece double curved circumferential products, has three variables Db, Do, and t. Db is the diameter of the blank or the diameter of the intermediate product. Do is the original outside diameter and t is the thickness...
  9. Transient1

    Modeling beam and shell support Frame

    Hi all, I am trying to reduce the model size of a project I am working on and I am a little unsure if I am handling it correctly. I have a test fixture that looks like a box with beams along each of its edges. It has four long beams and at the ends four short beams connect between the long...
  10. Transient1

    2007 B&PV Division 2 Part 5 Secondary & Peak Stress Clarification

    Questions below. I understand peak stresses (F) as arising basically from geometric discontinuities/nonlinear stress distributions. Secondary stresses (Q) seem more elusive. In the examples of stress categorization, Q can at times be thermal stresses, membrane stresses, gradient through plate...
  11. Transient1

    Shock Testing Requirement Reasoning

    MIL-STD-1540 states that 50% of the spectrum points during a shock test must be above the nominal test value. Can anyone provide some insight into how this requirement came about? 50% of the points above nominal doesn't seem to mean much because you could still test below nominal (within the...
  12. Transient1

    Modifying Poured Concrete Foundation

    I'm looking at buying a home with an unfinished basement and somewhere along the line it would seem nice to put full size windows in the basement. Putting the windows in would involve cutting out a larger section below the existing windows (small basement windows ~36''long x 10'' wide) However...
  13. Transient1

    Response Spectrum Analysis Contact Results

    Hi, I've performed a response spectrum analysis and I want to make sure that the right procedure in post processing contact results is something like: summtype,comp /INP,,mcom ESEL,S,REAL,# !Select Contact Target FSUM,,CONT !Get reaction forces I'm a little confused about when I would...
  14. Transient1

    MIL-DTL-83513 Connector Dimensioning Inconsistency

    Has anyone noticed that for D-sub miniature connectors (in my case a 9-pin connector) if the connectors are each hard mounted that according to the dimensioning of the connectors it is impossible to gaurantee 100% fit. I am dealing with the case of one box plugging into another box. According...
  15. Transient1

    Purchasing Snubbers / Finding Snubber Materials

    I need to select an appropraite snubber material for use in an electronics box that will be flown in space (So outgassing is an issue). I've been trying to a find a listing of viscoelastic materials or a supplier for circuit board snubbers and google has been coming up with very little. So far...
  16. Transient1

    Temperature Result not equal to Temperature Boundary Condition

    I have a complex model with contact. I set one face to a boundary temperature and I have heat flow (Watts) on a few other faces. The problem solves but the results show that face with the temeprature constraint is equal to a different value than what was set. I am refining the mesh and rerunning...
  17. Transient1

    How to Increase SRS by 3dB

    I have a shock response spectrum where at 100 Hz it is 6 G and at 1000 Hz it is 240 G. A specification says that the unit should be tested at this SRS at +3dB. Am I correct in saying that this means to increase the SRS by a factor of 2 (so 12 G at 100 Hz and 480 G at 1000 Hz) and if it was 6dB...
  18. Transient1

    Fastener Axial Load Exceeds Preload Question

    The situation is that I have a fastener that may exceed its estimated preload by 50%. This axial load is not enough to damage the threads. What is the consequence of exceeding the preload if the pull out load is not surpassed and the fastener is staked around the fastener head to prevent...
  19. Transient1

    Plot Hysteresis Response

    I'm having difficulty figuring out the APDL commands necessary to plot the hysteresis response of my analysis. I think what I need to do is plot stress versus strain at each time point of the analysis. Can anyone provide me some guidance on this?
  20. Transient1

    Constrain Nodes at Current Location within a Multi-step Process

    Hi, I am working in workbench V11 and I have a two step process: (1) Step one apply displacement. (2) Hold that displacement and now fix an edge at its current location. Is there a way to do this elegantly in workbench? I suppose one way to do this is to get the location of each node...

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