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  • is it possible to design this beam with these dimensions ?

    Discussion in 'The main mechanical design forum' started by jimxz, Nov 6, 2015.

    1. jimxz

      jimxz Member

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      is it possible to design this plate so that it deflects only 0.1 mm ?

      [​IMG]

      [​IMG]
       
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    3. jimxz

      jimxz Member

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      material is AISI 1045 Steel, cold drawn
       
    4. CPPMable

      CPPMable Well-Known Member

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      I would say go back to the basics. This is a simple problem that doesn't really need FEA. Derive the equations for a beam with fixed ends and two point loads. This is a very common problem. You than can very easy solve the equation based on your fixed parameters to determine if it is possible with the current load/material/area moment/etc.
       
    5. jimxz

      jimxz Member

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      fair enough. my question is how can it be designed so that the deflection is 0.1 mm while keeping the thickness at 60 mm ?
       
    6. tonycro

      tonycro Well-Known Member

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      no, your are faced with dimensional limits. As CPPMable says, go back to basics - at 60mm deep that is the limiting factor that defines the second moment of area - its resistance to bending.

      the only way to then reduce bending is too increased the youngs modulus of the material but to get close to 0.1mm you need to have E > 1000GPa !

      you need to deepened the beam section or reduce the load :(

      tony
       
    7. jimxz

      jimxz Member

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      great I agree. how about making the shape a bit less simple. how about curving the beam upwards !? how is that done ?
       

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