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Recent content by Joel_Lapointe

  1. Joel_Lapointe

    Small dc brushed electrical motor format "280"?

    Well, Would be pretty much big for a small brushed 12V dc motor for automotive door locker and/or appliance motor! Is there a different standard for these small motors?
  2. Joel_Lapointe

    Small dc brushed electrical motor format "280"?

    I'm searching over the Internet a type of small DC brushed motors. I came to the conclusion that there is a standard for naming these. However, I don't find the original source of this standard. Different manufacturers are naming these motors with the number "280" placed withing other...
  3. Joel_Lapointe

    Classification of peroxide silicone sealant?

    I'm attempting to do a document to explain myself and my collegues the classification of silicone sealants. What I saw over internet is that most of the time, the classification goes like that: Acetoxy silicone (condensation cure + humidity + organic tin catalyst) Alcoxy silicone (condensation...
  4. Joel_Lapointe

    Automotive overmolded connector sealing

    Hi, We have an automotive mechatronic actuator product that contains some overmolded electrical pins that forms a connector. This PBT enclosure must be IP67. Despite the pins being overmolded, there is sealing issues. An example is that some automotive oil is running in electrical wires between...
  5. Joel_Lapointe

    Attribute gage r&r

    Hi! I have no experience into gage r&r for attribute gage validation (new engineer in training). So we have gages that are measuring a dimension with 3 attributes : to small, good and to big. I'm tasked to qualify those gages with a gage r&r process from AIAG MSA. According to our quality...
  6. Joel_Lapointe

    Cylindrical coordinate system shear stresses for SolidWorks Simulation?

    I have a simple axisymetric part with a torque load. SolidWorks Simulation gives the choice to get the shear stresses in the usual x, y and z coordinates system. I didn't find a way to get the angular shear stress? Is there a way to get shears in the cylindrical coordinate system?
  7. Joel_Lapointe

    Bad drawing conversion (hole pattern asymetric position)

    I've put zero because I need to change it accordingly...
  8. Joel_Lapointe

    Bad drawing conversion (hole pattern asymetric position)

    Currently working on a part mod. I want to convert the current drawing to proper GD&T standards. So, a 6 holes pattern of 6mm H7 is positioned on a pitch circle of 25.78 which has asymetrical tolerance. So, I want to convert this asymetrical tolerance of (+0.012, -0.006) mm to a position...
  9. Joel_Lapointe

    Equations in forum threads (MathML)?

    Unless I'm unaware of it, I don't see any way to include equations within the threads. I resort to put images with equations in them. As an engineering forum, it is unfortunate. Is there a way to push "MathML" in the interface? Is there a forum for "user suggestions" so people can post suggestions?
  10. Joel_Lapointe

    Signed von Mises stress when the sign is "zero"

    I have a stress state that gives a sign of zero for the signed von Mises stress. According to most of the literature, the sign is coming from the first invariant I1 of the stress tensor (Hydrostatic stress): For the general stress state the invariants are : For the principal stresses the...
  11. Joel_Lapointe

    Get fatigue the notch factor for non standard geometry?

    We have an aluminium die casting housing that receives some machining. From time to time, the machining is notching a wall. A hole is produced so 2 empty volumes are communicating. Since all of this is sealed with 2 shaft seals and a cover, we may accept that hole as is. However, we aim to make...
  12. Joel_Lapointe

    Empirical formulas for compressive yield strength?

    I have material sheets in a sandwich pressed by screw. So, buckling isn't a problem, the width is way bigger than the height. The sandwich varies in composition (steel, plastics, aluminium ...). For our application, it is important to know this compressive elastic limit.
  13. Joel_Lapointe

    Empirical formulas for compressive yield strength?

    I work with a diversity of materials. The properties of these materials aren't always well known in websites like MatWEB, Campus plastics... Compressive Yield Strength is seldom given for most materials, even common ones. Despite that, I need that property in my calculations. Is there some...
  14. Joel_Lapointe

    Helical gear tooth force according to axis torque

    I can't talk about the reasons... Thank you for the suggestion for "Buckingham". I'll dive into it.

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