Example: biology
Janka hardness
Found 1 free book(s)Wood Handbook, Chapter 11: Mechanical Properties of …
www.fpl.fs.fed.usHardness is measured as resistance to indentation using a modified Janka hardness test, measured by the load required to embed an 11.3-mm (0.444-in.) diameter ball to one-half its diameter. Fastener holding strength is the maximum resistance to separate or withdraw a fastener in …