STRAIN MEASUREMENT TECHNIQUES FOR FIBER MODULUS DETERMINATION

Two techniques were employed to measure the tensile strain of Kevlar-49-III organic fiber in an epoxy matrix. One, a direct averaging strain method, uses two linearly variable differential transformers whose hollow cores are supported by glass beads bonded to the fiber strand specimens. The other method is an indirect method using specimens of several gage lengths. The crosshead displacement for selected loads was determined for each method and the unit strain calculated for each load. The tensile modulus of the Kevlar-49-III fiber strands was determined to be 20,000,000 psi (138,000,000 kPa). The variation of the averages between methods and within methods between specimens was less than five percent. /Author/

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  • Supplemental Notes:
    • Work performed under the auspices of Atomic Energy Commission.
  • Corporate Authors:

    American Society for Testing and Materials

    100 Barr Harbor Drive, P.O. Box C700
    West Conshohocken, PA  USA  19428-2957
  • Authors:
    • Moore, R L
    • Lepper, J K
  • Publication Date: 1974-5

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 173-175
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00264692
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 31 1974 12:00AM