EFFECT OF A MOLDED PATTERN ON THE RIGIDITY OF PLASTICS,
Abstract
This report covers an investigation of the effect of a molded pattern on the rigidity of plastic materials. It is concluded that: (1) Thermo plastic sheet material and glasforced plastic laminates both showed increases in stiffness similar to those reported for such metals as steel, Al and Co; (2) Assuming a rigidity of 1 for a flat sheet, a single formed sheet had a rigidity of 6; two molded sheets bonded, a rigidity of 25; and two molded sheets face-to-face with pattern matched and bonded, 44; (3) Although the rigidity varied with the angle of test, none of the deflections varied by more than 26% from the average; (4) Rigidized sheet material may be made without increasing the weight of the material; and (5) Use of the rigid izing pattern could be made to overcome the initial low modulus of elasticity of the plastic. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 29, 1963
- Accession Number
- AD0418005
Entities
People
- Solomon Goldfein
Organizations
- United States Army Engineer Research and Development Laboratory