Radiographic layer counter for composites. Final technical report, Jun 87-Feb 88

Technical Report · Sat Jun 01 00:00:00 EDT 1991

OSTI ID:6166223

Larsen, R E

The Army helmet is a composite of layers of resin-bonded Kevlar. Inadvertent omission of layers or undetected shifting of layers during molding processes can reduce the effective number of fibers in some helmet areas and impair their strength properties. A nondestructive method of 100% testing of the helmets, more effective than random sampling by ballistic testing, is needed. This six-month study evaluated the feasibility of using relatively low-energy radioisotopes to gauge the uniformity of Kelvar helmets. The potential for constructing a portable detection unit was also assessed. A laboratory radiometric test system was used to evaluate resin-bonded Kevlar samples, as well as actual Army helmets from current suppliers. It was found that the radiometric test system has the capacity to reflect the general condition of fabricated Kevlar helmets.

• Research Organization: Reinhart and Associates, Inc., Austin, TX (United States)
• OSTI ID: 6166223
• Report Number(s): AD-A-240794/8/XAB; CNN: DAAK60-87-C-0039
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
42 ENGINEERING
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
MILITARY PERSONNEL
PROTECTIVE CLOTHING
NONDESTRUCTIVE TESTING
RADIOMETERS
PERFORMANCE TESTING
ARAMIDS
FEASIBILITY STUDIES
FIBERS
HEAD
LABORATORIES
LAYERS
MECHANICAL PROPERTIES
MILITARY EQUIPMENT
MOLDING
PORTABLE EQUIPMENT
PROCESS CONTROL
PROCESSING
RADIOISOTOPES
SAMPLING
BODY
BODY AREAS
CLOTHING
CONTROL
EQUIPMENT
FABRICATION
ISOTOPES
MATERIALS
MATERIALS TESTING
MEASURING INSTRUMENTS
PERSONNEL
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
RADIATION DETECTORS
SYNTHETIC MATERIALS
TESTING
450000* - Military Technology
Weaponry
& National Defense
420500 - Engineering- Materials Testing
440102 - Radiation Instrumentation- Radiation Dosemeters