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  • Users: Dikuza
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  1. Dikuza

    NX: How to ignore touching pairs in Clearance Analysis and only review for hard interferences?

    Hello, I'm trying to run clearance analysis (NX 2212) however is extremely slow due to the large assembly and analysis including "soft" and "touching" pairs, resulting in over 1000 instances, 90% of which are face-to-face mated components. How can I ignore these and check only for hard...
  2. Dikuza

    Steady-State (Static) vs Dynamic Acceleration. What's the Difference?

    Regarding the design of spacecraft structures, what is meant by "static" and "dynamic" acceleration? Any help is much appreciated! Launch vehicle providers always include a table of Spacecraft Design Limit Load Factors in their user guides to use for spacecraft preliminary design. For...
  3. Dikuza

    How to Analyze and Size Spacecraft Structures: Loads Development & Structural Dynamics

    Hello, I'm a mechanical/aerospace design engineer trying to expand into structural analysis. What I'm looking for: A guide or summary as to 1) how spacecraft design loads are determined, and 2) how components are analyzed to these loads Recommended course to learn the above Ideally, I'd...
  4. Dikuza

    Help Understanding Limit Load and Margin of Safety

    Hello, I'm a mechanical design engineer wanting to expand more into structural stress analysis and looking for some clarification on the determination and use of limit load, test loads, and margins. My question is what actually is Limit Load and how are Margins calculated? See examples below...
  5. Dikuza

    How to Approximate Aerodynamic Coefficients

    Hello, this is a very specific question so any help is much appreciated! GOAL: I'm trying to get a first-pass analytical approximation for the lift and drag coefficients for hypersonic flow over a blunt-body capsule spacecraft (similar to NASA's Apollo or SpaceX's Dragon) during atmospheric...
  6. Dikuza

    Online course/resources to learn mechanical stress analysis

    Hello, I'm looking for online courses/resources (either free or inexpensive) to learn general stress analysis. My work experience so far (6 years) has been in Aerospace design and have been referred to Roark's, Shigley's, and Bruhn's text which I've started reading, however, these are very...
  7. Dikuza

    NX11 Batch Assign PMI to Multiple Similar Parts

    I have several (50+) parts that are all essentially rectangular plates of varying size with a few holes of different locations. I'm trying to minimize the amount of repetitive work when it comes to getting these made. My thought was to avoid making drawings entirely, and do this through...
  8. Dikuza

    NX8.5 Iterate Dimensions Until Condition Is Met. Journal: "Invalid attempt to load library&quot

    Hello, I'm wondering if there's a way to iterate a specific dimension through some given range, until a user-defined condition is met? For example, I would like to iterate the length of a line in one of my sketches until a specified distance is measured between two bodies. If this is not...
  9. Dikuza

    HELP! Motion Simulation Dynamic Analysis

    I'm trying to set up a model in NX8.5's Motion Simulation to run dynamic analysis and am having trouble determining the resultant forces/torques. What is the best method to go about this? For example, if I have a simple system of two mating gears with a torque applied to one, when I try and...
  10. Dikuza

    HELP! NX Motion Simulation Reverse Solver

    Hey all, I'm wondering if there's a way in NX's Motion Simulation to reverse solve a system for a given input/desired output I think of this similar to Excel's "Goal Seek" function in which you set a specific cell to a particular value by automatically changing another cell. For example, I...
  11. Dikuza

    How to Prevent Assembly From Opening Children Parts

    Hello, I'm working with a large assembly using Component Groups. My Assembly Load Options are set to: Use Partial Loading Use Lightweight Representations Load Structure Only When I load one of the Component Groups, NX physically opens some of (but not all) of the parts/subassemblies listed...
  12. Dikuza

    Toggle Display of Sketch Dimensions On/Off

    Other than displaying everything as PMI and hiding PMI Dimensions (which seems to slow down my model), is there an easy way to quickly toggle the display of sketch dimensions? I'm trying to design a mechanism by mapping it through sketches, and would like to see it without the dimensions, but...
  13. Dikuza

    Linkage Mechanism Design Software

    I'm trying to design a complex linkage assembly of which the defined path starts as a straight horizontal line, then at a given point, follows a circular curve 90 degrees and stops. Does there exist any program that can map out potential linkage assemblies based on a prescribed path? The only...
  14. Dikuza

    Modeling Gears in NX8.5 (No Toolkit)

    Other than the CG Toolkit (China license only), does anyone have a good method for modeling gears in NX? I'm trying to create a set of bevel gears and can't find a good way to do this. I've tried using a GRIP function but that only gives the tooth profile, not an actual solid. This would also...
  15. Dikuza

    Custom Fastener Assembly Configuration (8020)

    Hey all, Sorry if this has already been answered somewhere but I've done a good amount of research and haven't found a good solution. I have a large assembly of 8020 aluminum extrusions and am looking for an easy way to quickly add all the necessary fasteners (screws and slider nuts), of...
  16. Dikuza

    Windchill/NX: "Failed to open in NX. Internal error."

    I'm using NX8.5 with Windchill as the PDM/PLM. I have an assembly with several different Arrangements. When I try and open the assembly, Windchill gives me the following message: "Failed to open in NX8.5 Internal Error." for the top level assembly. If I then right-click and "Open" the assembly...
  17. Dikuza

    Torque required to lift a load independent of screw engagement?

    Hey all, I'm trying to do a simple calc to determine the torque required to lift a load (essentially a power screw). I have found several different equations from the following sources: 1. http://www.engineeringtoolbox.com/screw-jack-d_1308.html 2. https://en.wikipedia.org/wiki/Leadscrew 3...
  18. Dikuza

    Determining Position Tolerance Value

    Hello, I understand most GD&T and how to interpret a position callout, however, I'm still a little confused on how to actually determine the correct value for diametrical position callouts. Please let me know if my below method is correct: 1. Two parts are to be bolted together via a...
  19. Dikuza

    Help creating edges on a swept body or curved mesh

    Hello, I have a swept body that I would like to apply chamfers to as well as eventually dimension off of. The original path was that of an oval, hence the sweep. It's because of this sweep, I assume, that not all lines are considered "edges." In the attached image, the pink line is what I need...
  20. Dikuza

    Best resources for new hires

    Hello, I just started my professional career as a mechanical engineer doing primarily design work for a small aerospace company and was wondering what resources you all have found helpful that you wish you had starting your first job, making you a smarter and more efficient worker. Things such...

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