1990 Volume 56 Issue 524 Pages 759-767
A new method for measuring the strain around the high-temperature-creep-crack tip is proposed in the present paper. A grid pattern was described in a space of about 30μm with a diamond stylus in the area ahead of the precrack of the specimen. Then the distortion of the grids and the change in specimen thickness which were induced by the creep deformation were measured by means of the photomicroscope and the roughness-measuring system, respectively. The three-dimensional components of the strain were calculated through the Lagrangian equation, into which the above measurements were introduced. The route of creep-crack extension was examined in association with the local strain measured through the proposed method.
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
Transactions of the Japan Society of Mechanical Engineers Series C
Transactions of the Japan Society of Mechanical Engineers Series B
