National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

Non-Metallic Antenna-Support Materials.

COM7411770

Publication Date	1973
Personal Author	Marlowe, D. E.; Halsey, N.; Mitchell, R. A.; Mordfin, L.
Page Count	54
Abstract	A program was initiated to develop a non-conductive FRP rod material for use as guy lines and catenaries in large antenna systems. It is intended that the longterm structural properties of the new material, under adverse weathering conditions, be superior to those exhibited by the GRP rod and rope materials which are available at the present time. Two new end fittings for FRP rod were developed which out-perform commercially available fittings. These two fittings, which enable the tensile strengths of the rod materials to be accurately determined, include a shear-type fitting and a compression-type fitting. Deficiencies in the physical characteristics of existing GRP rod materials were identified, and modifications to the manufacturing processes were proposed to overcome these deficiencies. A subcontract was let for the manufacture of experimental GRP rods using the modified processes. A bank of six high-capacity creep testing machines was designed and is being assembled. These machines, which will accommodate long specimen lengths, are equipped with environmental chambers to permit stress-rupture testing under elevated temperature and saturated humidity conditions.
Keywords	Supports Antennas Fiberglass reinforced plastics Rods Reinforced plastics Polyester resins Guy wires Fittings Finite element analysis
Source Agency	National Institute of Standards and Technology
NTIS Subject Category	49A - Antennas
Corporate Authors	National Bureau of Standards, Washington, D.C. Engineering Mechanics Section.; Air Force Materials Lab., wright-Patterson AFB, Ohio.
Document Type	Technical Report
Title Note	Annual interim rept. no. 1, 16 Oct 71-15 Oct 72.
NTIS Issue Number	197503
Contract Number	F33615-72-M-5000

Non-Metallic Antenna-Support Materials.

Non-Metallic Antenna-Support Materials.
COM7411770

Publication Date	1973
Personal Author	Marlowe, D. E.; Halsey, N.; Mitchell, R. A.; Mordfin, L.
Page Count	54
Abstract	A program was initiated to develop a non-conductive FRP rod material for use as guy lines and catenaries in large antenna systems. It is intended that the longterm structural properties of the new material, under adverse weathering conditions, be superior to those exhibited by the GRP rod and rope materials which are available at the present time. Two new end fittings for FRP rod were developed which out-perform commercially available fittings. These two fittings, which enable the tensile strengths of the rod materials to be accurately determined, include a shear-type fitting and a compression-type fitting. Deficiencies in the physical characteristics of existing GRP rod materials were identified, and modifications to the manufacturing processes were proposed to overcome these deficiencies. A subcontract was let for the manufacture of experimental GRP rods using the modified processes. A bank of six high-capacity creep testing machines was designed and is being assembled. These machines, which will accommodate long specimen lengths, are equipped with environmental chambers to permit stress-rupture testing under elevated temperature and saturated humidity conditions.
Keywords	Supports Antennas Fiberglass reinforced plastics Rods Reinforced plastics Polyester resins Guy wires Fittings Finite element analysis
Source Agency	National Institute of Standards and Technology
NTIS Subject Category	49A - Antennas
Corporate Authors	National Bureau of Standards, Washington, D.C. Engineering Mechanics Section.; Air Force Materials Lab., wright-Patterson AFB, Ohio.
Document Type	Technical Report
Title Note	Annual interim rept. no. 1, 16 Oct 71-15 Oct 72.
NTIS Issue Number	197503
Contract Number	F33615-72-M-5000