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  • Users: prelmes
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  1. prelmes

    Ansys 12.1 - Remote Displacement

    I'm applying a remote compressive displacement to a plate that sits on top of a rubber spring (z-axis). At the moment I've constrained the x and y displacement to zero - which is not representative. Nor is allowing the plate to move freely in the x and y direction. How do I allow the plate to...
  2. prelmes

    Equivalent force on impact

    I'm trying to calculate the equivalent force on impact. Using the conservation of energy approach - the Physics based text books I've consulted suggest Force (Fe) x displacement (d) = kinetic energy (KE). However, the engineering texts suggest the relationship is: Fe x d = 2 x KE. Am I...
  3. prelmes

    Comparative testing

    We would like to change our plating supplier. The components are mild steel and receive a zinc plate and passivate. The potential new supplier uses a different process to the current supplier - although we are assured the parts will have the same level of corrosion protection. Is there a...
  4. prelmes

    Electronic encapsulation

    I'm currently researching methods to encapsulate electronic components to meet ATEX approval. I'm keen to understand what materials are typically used for this application and the type of processing techniques employed. I would be particularly interested to hear from anyone who has used low...
  5. prelmes

    Nickel-Silver contamination

    Hi We have observed 'blackspot' contamination on a nickel-silver alloy (see images in attached spreadsheet). We are assured by our suppliers that the contamination cannot be easily removed by solvent and/or abrasion. Our supplier has also informed us that the contamination was present on...
  6. prelmes

    Knitting & nitrile

    Can anyone suggest a useful source of information (text book, web article, etc) that explains the cause of "knit lines" in rubber mouldings - with particular reference to nitrile...
  7. prelmes

    Torsion of I-section

    There is a case for torsion of an I-section in Roark's formulas (Table 20, No. 26). However, the formula requires the following information: "a positive angle through which a tangent to the boundary rotates in turning or travelling around the reentrant portion". How do I determine...
  8. prelmes

    Ultrasonic vulcanisation

    Does anyone know where I can find information on the ultrasonic vulcanisation of rubber-to-metal bonded components?

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