This report documents the work accomplished during the course of a three year period. The main objective of this study was to investigate the collapse of thick-walled tubes under combined axial tension and pressure. A combined analytic and experimental approach was adopted. The D/t range of interest was 10-40. A number of collapse tests were conducted using small diameter tubing. Careful measurements of geometrical and material parameters were carried out before each collapse test. Tension-pressure collapse envelopes were obtained for tubes of different D/t. Collapse tests involving different ...
This report documents the work accomplished during the course of a three year period. The main objective of this study was to investigate the collapse of thick-walled tubes under combined axial tension and pressure. A combined analytic and experimental approach was adopted. The D/t range of interest was 10-40. A number of collapse tests were conducted using small diameter tubing. Careful measurements of geometrical and material parameters were carried out before each collapse test. Tension-pressure collapse envelopes were obtained for tubes of different D/t. Collapse tests involving different loading paths as well as initially ovalized tubes were carried out. Specimen of lower DIt values tested at very high tensile loads showed a lack of collapse failure within the load-displacement capability of the setup.