The features of the ideal elastic-plastic stress-strain curve compared with practical curves are discussed with reference to conventional materials engineering and geosynthetic materials testing practices. Uniaxial and biaxial test curves are compared and references to the modes of failure of the two types of specimens. A comparison of the well-drained yield points HDPE geosynthetics with the smoother elastic-plastic transitions in LLDPE and PP is presented, together with methods that define artificial yield points. Considerations for the use of one, rather than two, gage length values for the determination of yield and break strain behavior of geosynthetics in laboratory uniaxial tests and in the field are compared together with their significance in the stress crack testing and alongation performance in HDPE geomembranes. Reference is also made to the measurement of strain and its significance during the shear testing of seams.


  • English

Media Info

  • Features: Figures; References;
  • Pagination: p. 3-17

Subject/Index Terms

Filing Info

  • Accession Number: 00801030
  • Record Type: Publication
  • ISBN: 0803128541
  • Report/Paper Numbers: STP 1379
  • Files: TRIS
  • Created Date: Oct 16 2000 12:00AM