Time-Temperature Behavior of a Unidirectional Graphite/Epoxy Composite

Creep rupture of polymer-matrix composites

“…agreed well with experimentally determined curves and medium term (103 minutes) test results [1,[3][4][5]. Therefore, the information given in…”

“…An E 2 master curve* (item C) for the same material is shown in Figure 5. The TTSP methods used to obtain such master curves was reported previously [1,3]. Further, it was shown in earlier publications that the shift function (item C) was essentially independent of fiber angle and that master curves for arbitrary fiber angles predicted using the orthotropic transformation equation (item B)…”

The Viscoelastic Behavior of a Composite in a Thermal Environment

“…to A previous study 12 found S 11 and S 12 to be independent of time for our graphite/epoxy material. The time dependent compliances S 22 (t) and S 66 (t) are found from creep tests of specimens with fiber orientations of 90° and 10°, respectively.…”

“…3 were constructed. 13 The need for such master curves will be subsequently discussed. It is assumed that reciprocal of compliance, such as shown in Figs is important when calculating lamina modulus for an arbitrary fiber angle using anisotropic transformation equations.…”

The viscoelastic behavior of the principal compliance matrix of a unidirectional graphite/epoxy composite

“…Load levels were such that material response was always linear viscoelastic. Further discussion of the experimental procedures may be found eisewhere [8].…”