Accession Number : AD0733731

Title :   Properties of Re-Entry Materials.

Descriptive Note : Final technical rept. Apr 69-Jun 71,

Corporate Author : IIT RESEARCH INST CHICAGO ILL

Personal Author(s) : Bortz,Seymour A.

Report Date : OCT 1971

Pagination or Media Count : 222

Abstract : The engineering and design data characterizing new reentry materials are evaluated. Materials studied were a molded carbon cloth phenolic composite (REST 6300), and a pierced fabric composite. Tests were also conducted on FRP Teflon which is being employed for behavioral studies under reentry conditions. REST 6300 was evaluated for mechanical strength, elastic modulus, strain to failure, and thermal expansion at various temperatures up to 6000 F. Precharring was used to reduce the effect of time on char conditions during testing. All property measurements were evaluated and related to the temperature of the test conditions. The FEP Teflon was evaluated for shear and compression strength and modulus, viscosity, and stress relaxation over a temperature range from room temperature to 450 F. These experiments provided material properties which could be used to verify material response theories developed to explain cross hatching phenomena which may occur in a re-entry environment. (Author, modified-PL)

Descriptors :   (*COMPOSITE MATERIALS, THERMAL ANALYSIS), (*REENTRY VEHICLES, *HEAT SHIELDS), HALOCARBON PLASTICS, PHENOLIC PLASTICS, LAMINATES, PYROLYTIC GRAPHITE, MICROSTRUCTURE, THERMAL STRESSES, HEAT TREATMENT, COMPRESSIVE PROPERTIES, THERMAL PROPERTIES

Subject Categories : Laminates and Composite Materials
      Guided Missile Reentry Vehicles

Distribution Statement : APPROVED FOR PUBLIC RELEASE