Compressive Strength of Ship Hull Girders. Part III. Theory and Additional Experiments.

摘要

A phenomenological theory has been developed for predicting the ultimate strength of rectangular structural plates loaded in uniaxial longitudinal compression, uniaxial transverse compression and biaxial compression. The effects of normal pressure also were considered. The theory was found to be in reasonable agreement with experimental data. Certain areas of the theory and some of the experiments require additional study. The longitudinal compression theory was found to agree well with corresponding theories of other investigators. Other results of broad interest are the demonstration of the applicability of a biaxial plasticity law to biaxial strength theory and the delineation of a method for selecting an optimum material for compression strength. The use of stress-strain curves for strain analysis of critical and ultimate strengths is described. They were employed to construct theoretical strength curves. Theoretical relations and corresponding curves have been developed for perfect plates. The effects of strength degrading factors are discussed and the analysis of residual stress effects is included.