ISSN:
1460-2695
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract—Three different fracture mechanics approaches were applied to two full-scale penstock model tests. The two models were produced, using a Sumiten 80P HSLA steel (minimum yield strength 700 MPa and minimum ultimate tensile strength 800 MPa), in the form of pressure vessels. The first experiment was a burst test performed on a pre-cracked model to determine crack arrest properties. The second experiment was a hydro-pressure test on a model with no cracks and this enabled a post-yield experimental analysis of the undermatched weld metal, when cracks did not initiate. Crack driving forces, obtained numerically, and J-R curves, obtained by the J-integral direct measurement on tensile panels, were used to predict the residual strength. The overall behaviour of a welded penstock under load was analysed on the basis of the results of these three approaches, allowing an evaluation of the significance of cracks.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1460-2695.1995.tb01415.x
