Calculating or Modeling Resistance of a Complex 3-D Shape

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SUMMARY

This discussion focuses on methods to calculate or model the electrical resistance of complex 3-D shapes, specifically using the example of a cone. Participants recommend using Finite Element Method (FEM) software, such as Ansys Maxwell, for modeling resistance and visualizing current density. While FEM software may not be specifically designed for resistivity calculations, it can effectively represent complex geometries. The conversation also highlights the analytical approach to resistance calculation, which involves advanced mathematical techniques like vector calculus.

PREREQUISITES
  • Understanding of electrical resistivity and its relation to material properties
  • Familiarity with Finite Element Method (FEM) software, specifically Ansys Maxwell
  • Basic knowledge of vector calculus for analytical resistance calculations
  • Ability to mathematically describe complex geometrical shapes
NEXT STEPS
  • Research the capabilities and features of Ansys Maxwell for modeling electrical resistance
  • Explore other FEM software options suitable for complex shape analysis
  • Study vector calculus applications in electromagnetic resistance calculations
  • Learn about current density visualization techniques in electrical engineering
USEFUL FOR

Electrical engineers, researchers in material science, and professionals involved in the design and analysis of electrical components requiring resistance modeling.

vlado4
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Hello all!

I am looking for a method to calculate or model a resistance of a complex 3-D shape.

For example if I have the resistivity of a material, and I know the shape (let's say a cone), I would like to be able to model the resistance which this shape will produce.


I am looking for modeling software which would be good for this.

Also, it would be cool to be able to visualize the current density going through the conductor.
This would be particularly useful to identify current crowding and hot spots.


Has anyone else done this? Does anyone have recommendations?
 
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You'd probably be able to solve your problem with FEM software, such as:

http://www.ansoft.com/products/em/maxwell/

This software isn't exactly suited for finding resistivity of complex objects, but it's representative of FEM software.
 
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It is possible to do analytically, if you can describe the shape mathematically that is.

I remember calculating the resistance of a quarter washer using standard electromagnetic equations. I remember it was difficult, used a lot of vector calculus.
 

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