Mixed I/III mode fracture toughness of a 2034 aluminum alloy.

摘要

Mode I fracture toughness as a fracture mechanics parameter has been widely used in engineering applications. However, in reality, more often than not that the fractures occur under the mixed mode loading conditions. The complete understanding for the mixed mode fractures and the standard testing methods have not been well established. In this study, the mixed I/III mode fracture behavior of a 2034 aluminum alloy has been investigated. The results show that under the mixed I/III mode loading condition, the critical J-integrals at crack initiation are lower than that of the pure mode I case. The effect of Mn as an alloy element in this material has been also discussed in this work.