Recent content by Pellefant

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    Solving Spring Problem: Find F? Angle for 1 mm Compression

    I can represent the problem when i come back; you can get springs where the force only vary from 1 till 2%; and where it is sliding i will use a surface finish on 0,3; but i have not found a table who tells the relationship between surface finish and the coefficient for friction, but my guess is...
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    Solving Spring Problem: Find F? Angle for 1 mm Compression

    Am i rigth or not? i should add this is no homework it is for a real welding fixture; i can explain by pm if someone r interested. The problem definition is relevant as defined. My question is as stated above: ... There r gearing too; with 30 degree we get the following relationship: y-> 0,5...
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    Solving Spring Problem: Find F? Angle for 1 mm Compression

    Hi i think i get it now; The force F1 i wrote about do no not act on the plunger, that so explains it; i can also see that on you free body diagram and understand it by intution. It was nice to get that problem out of the way :). That changes the problem definition-> i will no see it was a...
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    Solving Spring Problem: Find F? Angle for 1 mm Compression

    I will look deeper into your reply in this week hopefully tomorrow. You say that there r more who r acting on it then the friction force; that is what has confused me. Because the force of the springs acts in the x direction, so who can it create a force in the y direction; let me illustrate...
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    Solving Spring Problem: Find F? Angle for 1 mm Compression

    About the friction force; it is equilibrium on the x direction; because the two friction forces in the right and left case are countering each other, in the x-direction. I am just interested in the force in the y-direction; so the only force who is interesting is the friction force in the...
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    Solving Spring Problem: Find F? Angle for 1 mm Compression

    Forgot it shall be multiplyed with 2 ... So is it ok?
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    Solving Spring Problem: Find F? Angle for 1 mm Compression

    Homework Statement I am seeking f? Homework Equations See picture The Attempt at a Solution See picture http://img14.imageshack.us/img14/1778/industri1.jpg ...... Also some private thinking if the angel would be 45 degree then i would use 50% of F?, because if F? puch the rod 1 mm...
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    Ask for validity concerning statement for friction?

    Anyone? The reason for the question is that it dosen't seems natural; but that is what i get; because how could a force in the x-direction eb created if we don't have friction?
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    Ask for validity concerning statement for friction?

    Homework Statement The statement i make is that detail 2 will never move in the x-direction if the friction is cero. Because the force who acts on detail 2 acts in the y-direction and not in the x-direction. If we have friction we will get a force who acts in the x-direction. See picture...
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    Second moment of area, storing of energy.

    Thank you! But why do you integrate hooks law when you do not integrate potential energy; m*g*h?
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    Second moment of area, storing of energy.

    I want to point out that this is not a Homework or Coursework question. in wiki we can read the following under the chapter intution: http://en.wikipedia.org/wiki/Second_moment_of_area Assuming linear elasticity, the restoring stress that any point in the beam will provide, is proportional...
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    Seeking method to optimization force distribution among rivet joints

    I have a case where I am trying to find the optimal place to put 3 rivet points (I will maybe even test with 4). The rivet points r subject to a force according to the picture, which vary 360. What I am seeking here is mathematical methods to find the optimal place to put the 3 riverts, so that...
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    Engineering Problem understanding Thévenins equivalent circuit

    Problem understanding "Thévenins equivalent circuit " The problem is illustrated in the picture below. http://img266.imageshack.us/img266/5422/thevininprobxn1.jpg I am not sure i understand this so well either, any comments are appriciated. Best regards Pellefant
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    How to model relative friction in ansys (FEM software)

    Yes but above that box, it is a box that says material id, which means that i give a friction coefficient for both materials, which hardly is the same as the relative friction between two surfaces Kindly Pellefant ...
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    How to model relative friction in ansys (FEM software)

    When you have friction between two surfaces, then u use the relative friction coefficient right. But how do i do that with ansys? I have put contact element between two different materials, but it doesn’t seems as I can use the relative friction in ansys. ... This is the possibilities i seems...
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