Comparison of some Data Reduction Schemes for Composite Delamination Specimens

Abstract

Three different solutions for orthotropic, beam-like fracture specimens were compared in the currentwork. A beam theory-based approach was developed previously by the author. Another solutionbased on refined plate theory was also considered. Finally, equations based on a numerical calibrationtechnique were utilized as a third solution. These solutions were extended for the case of compositedouble-cantilever beam, end-loaded split and single-cantilever beam fracture specimens. All the threesolutions give reliable expressions for the double-cantilever beam. In contrast for the end-loaded splitand the single-cantilever beam coupons the three models give quite distinct results, especially for themode ratio of the single-cantilever beam specimen