抄録
The deformation and the stress distribution of woven cloth reinforced laminates under tensile load were studied by FEM calculation and approximate calculation by the curved beam theory. Two boundary conditions were assumed in the analyses. One is a single layer condition and the other is a multilayer condition in which the surfaces of a laminate under consideration are fully constrained to normal displacement. The calculated results by the curved beam theory for the apparent modulus and the stress concentration factor in the longitudinal fiber bundle coincided with the results by FEM calculation.
The elastic moduli of the constituent materials of roving glass cloth laminates were determined by direct measurements and estimation by surface strain distribution of single layer laminates.
The calculated results on the elastic behavior and the static strength had good agreement with the experimental ones for the single layer laminates. For multilayer laminates, the predictions did not agree with the experimental results, suggesting that some delamination processes bring their properties more likely to the single layer laminates.
