アルミニウム合金7NO1-T6の平たんおよびせん断破壊抵抗の検討

概要

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With special attention to the fracture modes, flat mode and slant mode, ductile crack growth was examined over a wide range of crack extension of ran aluminum alloy 7 NO 1-T6 using compact specimens with various thicknesses and notch geometries. Results obtained are as follows : (1) The conventional concept that the ductile crack growth resistance of the slant mode is higher than that of the flat mode, does not hold true ; (2) The mode I, plane-strain, ductile crack growth resistance can be obtained from the J-Δa_<max> curve, where Δa_<max> is the maximum crack extension of the flat mode fracture near the midthickness of the specimens ; (3) It is not possible to evaluate both the ductile crack growth resistances of the flat mode and of the slant mode, using specimens with side grooves and with slant notches, respectively.
一般社団法人日本機械学会の論文
1986-06-25