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There are several machines that have (rotating) cutting blades. For example the kitchen aid Vorwerk Thermomix can cut pieces of Food in hundreds of pieces within a few seconds. But why it is so?

If the blade hits something, there must act some Forces that cut it into pieces. How to compute the Forces that act on a blade to the Thing that the blade is cutting? Can I also compute stress values during the cutting process?

Is there any literature in Engineering mechanics that unravels the mystery of cutting?

And I wonder why knives are classified with Rockwell hardness. I would be happy about a Basic introduction into this topic.

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  • $\begingroup$ Check out texts on machining lathes, drills etc and also resistance of materials ie cutting tomatoes compared to cutting beef and heat treatment .... $\endgroup$ – Solar Mike Oct 20 '17 at 8:45
  • $\begingroup$ Rockwell Hardness indicates how much force is required to deform a material, thus giving an indication as to the expected life of the blade. $\endgroup$ – L Selter Oct 20 '17 at 9:00
  • $\begingroup$ I am sure there is engineering literature, but that is off topic for this site. $\endgroup$ – L Selter Oct 20 '17 at 9:00
  • $\begingroup$ @LSelter I'm not sure if hardness is really what you would want to look at here, at least not exclusively. That wouldn't really account for pieces of the tip fracturing. $\endgroup$ – JMac Oct 20 '17 at 11:13
  • $\begingroup$ Manufacturing texts should cover this information in good detail. $\endgroup$ – JMac Oct 20 '17 at 11:14

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