METHOD TO DETERMINE MATERIAL LIMITING STATE DURING FEW CYCLES FATIGUE TESTING Russian patent published in 1994 - IPC

Abstract RU 2019813 C1

FIELD: material testing. SUBSTANCE: testing interruption to determine limiting state of material is exercised in the phase of its stretching, when loading achieves its maximum value. In the case they measure opening of crack edges along its trajectory and determine mean value of the opening by given ratio. Measurements are carried out at least twice with different number of loading cycles. According to results of measurements a plot of change of average crack opening as function of number of cycles is constructed. Extrapolating it to zero value of opening, they determine number of loading cycles, corresponding to limiting state of material by cracks beginning. EFFECT: increase of structure reliability estimation level particularly in the field of estimation of crack resistance of structural and processing concentrators. 2 dwg, 2 tbl

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RU 2 019 813 C1

Authors

Тarnovskij А.I.

Тarnovskij G.I.

Рronin V.Р.

Dates

1994-09-15—Published

1991-06-17—Filed