Dynamic Fracture Behavior of Magnesium Alloy under Biaxial Stress

Abstract:

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.

• Periodical: Materials Science Forum (Volumes 488-489)
• Pages: 853-858
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.488-489.853
• Online since: July 2005
• Authors: Do Yeon Hwang, Akira Shimamoto
• Keywords: Caustic Method, Dynamic Fracture, Fracture Toughness, Stress Intensity Factor (SIF)

References

[1] K. Wallin: Eng. Frac. Mech., Vol. 22(1985), pp.149-163.

[2] S. Aoki: JSME, Vol. 84(784), 1981, pp.243-249.

[3] A. Shimamoto, R. Kubota: Key Eng. Materials, Vols. 207-273(2004), pp.1254-1261.

[4] M. Nakano, K. Kishida and T. Yokoyama: JSME, Vol. 55, 512(1989), pp.782-789.

[5] K. Shimizu: JSNDI, Vol. 44, 7(1995), pp.498-504.

[6] S. Takahashi, T. Shimizu: Science of Machine, Vol. 37, 4(1985), pp.485-490.

[7] S. Takahashi, T. Shimizu: Science of Machine, Vol. 37, 5(1985), pp.621-626.

[8] K. Simizu, H. Shimada JSNDI, Vol. 32, 2(1983), pp.57-64.