Accession Number : AD0018554


Title :   DEVELOPMENT OF NON-DESTRUCTIVE TESTS FOR LAMINATED GUNSTOCK BLANKS


Corporate Author : YALE UNIV NEW HAVEN CT SCHOOL OF FORESTRY


Personal Author(s) : JAYNE, BEN A


Report Date : 08 Oct 1953


Pagination or Media Count : 19


Abstract : Four black-walnut gunstocks with lamination planes parallel, and 4 with lamination planes normal, to the wide face of the butt were laminated. Half of the blanks were laminated with pure Cascophen LT-67, a phenol formaldehyde adehsive; the others were laminated with a modified adhesive containing 15 wt-% of BaSo4. All were assembled with void, waxed, and cellophane-containing areas. Ultrasonic tests in water between 68 and 82 F did not reliably or definitely indicate the defects. Voids in pure-adhesive bonds were not revealed by 0.9-sec x-ray exposures taken at 45 kv and 60 ma; those indicated by ultrasonic transmissions in BaSoO4-containing adhesive were clearly evident in x-rays. However, x-rays were unsuccessful in detecting the other defects. Shear-test data which were obtained following the defect tests suggested the possibility of correlating the acoustic damping capacity of laminated specimens with recognized destructive tests. (See also AD-16 403)


Descriptors :   TEST AND EVALUATION , CAPACITY(QUANTITY) , WATER , LAMINATES , PHENOLS , ULTRASONIC TESTS , FORMALDEHYDE , DESTRUCTIVE TESTS , ACOUSTIC INSULATION


Distribution Statement : APPROVED FOR PUBLIC RELEASE