The crack path growth in aluminium alloy rectangular specimens under proportional bending with torsion

The paper contains the results of investigations of the crack path growthin rectangular specimens made of the AlCuMg1 aluminium alloy under proportionalbending with torsion loading. Specimens with rectangular cross-sections and stressconcentrator in the form of external one-sided sharp notch were used. The tests wereperformed under the different ratios of torsion to bending moments and different stressratio, R.