Tuesday, July 7, 2015

what is the best radius for a fillet in objects

According to wiki, the applications of fillets are:


  1. to eliminate the stress concentration
  2. to reduce aerodynamic drag
  3. for manufacturing cost reduction(in milling)
  4. it prevents the edges from damages
  5. to eliminate the injuries from sharp edges
  6. also it is given as an aesthetic feature


now, what is the best radius for a fillet in objects to eliminate the injuries from a sharp edge?
but before that another question should answer.

does a sharp edge really cause injuries?

A sharp edged object cannot make an injury as a knife does. because the included angle in the knife is really small to make the serious cut.

consider the sharp edge on a rectangular block.the included angle is 90 degrees. does it can make a cut on your body. if "burrs" are present on the surface obviously it will cause injuries. otherwise if the sharp edged block is having a surface finish like "i phone" it is difficult to make a cut.


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