2226 アルミ鋳造合金の動的破壊特性評価(S15-1 実験力学と材料評価(1),S15 実験力学と材料評価)

概要

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This study will address calibration of ductile fracture of a cast aluminum alloy. The tensile tests on the smooth and notched round bar specimens were performed to calibrate the fracture strain in the range of high positive stress triaxialities. The combined loading tests on the butterfly specimens were carried out using a uniquely designed Universal Biaxial Testing Device. These tests cover the fracture properties in the rage of low and negative stress triaxialities. Detailed finite element models of all the tests were developed. The fracture loci in the space of the effective plastic strain to fracture and the stress triaxiality were constructed in a wide rage from -1/3 to 1.0. It was found that material ductility sharply decreases with the stress triaxiality while the material ductility increases as the deformation rate increases at the high stress triaxiality.
社団法人日本機械学会の論文
2007-09-07