Effects of type of testing equipment and specimen size on toughness of wood
Combining results of several studies shows that toughness values determined with the FPL toughness testing machine average higher than those for comparable material determined with the Amsler Universal wood testing machine. In general, FPL machine values may be assumed to be 16 percent higher than Amsler machine values. (Author).
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2-centimeter specimens 5/8-inch and 2-centimeter Amsl Amsler and FPL Amsler machine Amsler toughness ASTM average toughness bolts were cut cient of variation Coeffi conditioning at 75 cut according Douglas-fir and Pacific Effect of specimen EFFECTS OF TYPE Forest Products Laboratory four studies FPL toughness fracture green and air-dried green or air-dried green wood HICKORY SPECIES higher than toughness inches Laboratory toughness testing larger specimen linear regression load-deflection diagrams loblolly pine moisture condition moisture content number of species Pacific silver fir pendulum setting potential energies Products Laboratory toughness radial or tangential Radial Tangential Radial ratio red oak shock resistance size on toughness small specimen specimen locations specimen sizes Tangential Radial Tangential total toughness toughness data toughness determined toughness machine toughness of air-dried toughness of green toughness on specific toughness testing machine toughness values obtained type of test unit toughness basis variability of toughness volume between supports wood testing machine