Gordon England Surface Engineering Forum



Surface Impact Resistance


Posted by Richard on January 05, 2004 at 19:12:11:

I am building a simple ball-impact tester to test the surface impact resistance/hardness of various wood finishes, based on one I used at university. It consists of a 5ft length of drain-pipe and a 2" diameter hardened steel ball to drop down the pipe onto my sample peices.

However I can't remember how to calculate the hardness using this method and don't have a text readily at hand. Can I use the Brinell formula directly, or do I need another? What if I want to convert these values to Janka Hardness values (as used in a table of wood species I have), how do you do this?

Any suggestions will be greatly appreciated.

~Richard, Winnipeg Canada.


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