DEVELOPMENT OF NON-DESTRUCTIVE TESTS FOR LAMINATED GUNSTOCK BLANKS
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 08, 1953
- Accession Number
- AD0018554
Entities
People
- Ben A. Jayne
Organizations
- Yale University