RESEARCH AND DEVELOPMENT REPORT ON JOINT DESIGN DATA FOR HIGH STRENGTH PLASTICS.
Abstract
The report lists the factors which influence the mechanical performance of joints constructed with high strength plastic structural (load-bearing) members. One of these factors, holding strength of screws in plastics, was studied by determining ultimate pull-out loads of 1/4 inch -20, 3/8 inch -16 and 1/2 inch -13 machine screws driven to various depths of penetration in a high strength plastic panel. However, more important than the pull-out data, the significant contri butions which evolved from this study may be listed as follows: (1) Mode of pull-out failure, for lower depths of penetration, was demonstrated to be local delamination and consequent panel failure, instead of hitherto supposed thread shear or bearing failure. (2) Value of a non destrucevve test technique to study mode of failure was demonstrated. (3) Two joining tech niques for improving fastener pull-out strength were developed, evaluated and introduced by the Laboratory for application in joint design. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 16, 1963
- Accession Number
- AD0416665
Entities
People
- A. Ufolo