Accession Number : AD0432299

Title :   COMPARISON OF BLOCK SHEAR METHODS FOR DETERMINING SHEARING STRENGTH OF SOLID WOODS,

Corporate Author : FOREST PRODUCTS LAB MADISON WIS

Personal Author(s) : Hilbrand,Howard C.

Report Date : FEB 1964

Pagination or Media Count : 25

Abstract : Information concerning the relative magnitudes of shear strength as determined by using cube-shaped or notched specimens in roller or nonroller testing apparatus has often been contradictory. This describes a comparative study, conducted at the U. S. Forest Products Laboratory and the Australian C.S.I.R.O. Division of Forest Products on six different specimen-apparatus combinations using matched specimens of southern yellow pine and overcup oak. Several of the combinations yielded estimates of shear strength that were significantly different, but standard deviations of shear strength were generally independent of the test method. Significant interaction of growth ring orientation and test type was apparent and may have contributed to previous conflicting views. In general, cube specimens yielded higher estimates of shear strength than notched specimens, and nonroller apparatus yielded higher estimates than roller-equipped apparatus. (Author)

Descriptors :   (*WOOD, MECHANICAL PROPERTIES), (*TEST METHODS, SHEAR STRESSES), TEST EQUIPMENT, STANDARDS, MOISTURE, DENSITY, EXPERIMENTAL DATA, STATISTICAL ANALYSIS

Distribution Statement : APPROVED FOR PUBLIC RELEASE