Effect of Fiber Direction on the Instability of Single-Layer Resin-Impregnated Glass-Cloth Cylinders under Torsion

摘要

128 tests on 65 single-layer open-weave glass-cloth resin-impregnated shells with five different fiber orientations were made. The report discussed these tests, the apparatus in which they were carried out, and the instrumentation used to make the appropriate observations. Additionally, it presents a statistical analysis of the results. This analysis indicates that fiber direction is significant. It influences both stability and stiffness. Generally speaking, the higher the strength the lower the stiffness. It is significant to note that the Southwell Plot which is generally accepted for column data interpretation is shown equally pertinent to this problem. (Author)