Accession Number : ADA306191

Title :   Thermal Expansion Properties of Composite Materials.

Descriptive Note : Contractor rept.,

Corporate Author : LOCKHEED MISSILES AND SPACE CO INC SUNNYVALE CA

Personal Author(s) : Johnson, Robert R. ; Kural, Murat H. ; Mackey, George B.

PDF Url : ADA306191

Report Date : JUL 1981

Pagination or Media Count : 62

Abstract : Thermal expansion data for several composite materials, including generic epoxy resins, various graphite, boron, and glass fibers, and unidirectional and woven fabric composites in an epoxy matrix, have been compiled into one comprehensive report. A discussion of the design, material, environmental, and fabrication properties affecting thermal expansion behavior is presented. Test methods and their accuracy are discussed. Analytical approaches to predict laminate coefficients of thermal expansion (CTE) based on lamination theory and micromechanics are also included. For space applications, a near-zero CTE is often highly desirable to maintain the thermal dimensional stability of a structure on-orbit. Although this is easily achievable with composite materials, it is often at the expense of some structural efficiency. A discussion is included of methods of tuning a laminate to obtain a near-zero CTE. Related references that describe these data more extensively are included. (MM)

Descriptors :   *COMPOSITE MATERIALS, *THERMAL EXPANSION, *EPOXY RESINS, THERMAL PROPERTIES, SPACE TECHNOLOGY, SPACECRAFT, LAMINATES, FIBER REINFORCED COMPOSITES, POLYAMIDE PLASTICS, FABRICATION, THERMAL STABILITY, GRAPHITE, VOIDS, INTERFEROMETRY, GLASS FIBERS, FABRICS, EPOXY COMPOSITES, BORON, MICROMECHANICS, WEAVING, GRAPHITE EPOXY COMPOSITES, UNIDIRECTIONAL.

Subject Categories : Laminates and Composite Materials
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE