Impact tests for woods

Bureau of Standards
naca-tn-78
February, 1922


Although it is well known that the strength of wood depends greatly upon the time the wood is under the load, little consideration has been given to this fact in testing materials for airplanes. Here, results are given of impact tests on clear, straight grained spruce. Transverse tests were conducted for comparison. Both Izod and Charpy impact tests were conducted. Results are given primarily in tabular and graphical form.

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http://naca.central.cranfield.ac.uk/reports/1922/naca-tn-78.pdf