Dynamic Fracture Behavior of Magnesium Alloy under Biaxial Stress
In this study, dynamic behaviors of cracks under dynamic biaxial stress were investigated. We conducted static and dynamic loading fracture experiments on a magnesium alloy (AZ31B-O) under equitable and inequitable biaxial stress by using a hydraulic high-speed biaxial experimental machine. We processed specimens as the cross type with a crack. Different kinds of cracks were defined by their crack angles. We analyzed the results using the caustic method. The experiments revealed some important findings; there is a negative relation between the fracture toughness value and the plate thickness of the magnesium alloy sheet specimen; the fracture toughness value decreases when the crack has an angle different from the loading direction; the fracture toughness value decreases significantly under inequitable biaxial stress.
W.Ke, E.H.Han, Y.F.Han, K.Kainer and A.A.Luo
D. Y. Hwang and A. Shimamoto, "Dynamic Fracture Behavior of Magnesium Alloy under Biaxial Stress", Materials Science Forum, Vols. 488-489, pp. 853-858, 2005