This paper is concerned with the determination of the far-field compressive buckling stress of a near-surface parallel crack, in the limiting case when the.crack is situated close to the free surface In other words, we restrict consideration to the practical case h/l < < 1, where I is the crack half-length and h is the distance between the crack and boundary The problem is simplified as the layer between the crack and the free surface can then be treated as a beam under given loads. For the case h/l < < 1, the critical buckling stress takes a very simple asymptotic form. As buckling is taking place, the crack starts to open asymmetrically, thus causing an increase of both mode I and mode II stress intensity factors Both K1 and K11 can be expressed in term of forces and moment at the crack tips. The stress intensity factors in the post-buckling regime can be calculated using a nonlinear analysis.
|Original language||English (US)|
|Title of host publication||4th North American Rock Mechanics Symposium, NARMS 2000|
|Publisher||American Rock Mechanics Association (ARMA)|
|Number of pages||7|
|ISBN (Print)||9058091554, 9789058091550|
|State||Published - 2000|
|Event||4th North American Rock Mechanics Symposium, NARMS 2000 - Seattle, United States|
Duration: Jul 31 2000 → Aug 3 2000
|Name||4th North American Rock Mechanics Symposium, NARMS 2000|
|Other||4th North American Rock Mechanics Symposium, NARMS 2000|
|Period||7/31/00 → 8/3/00|
Bibliographical noteFunding Information:
Partial Funding for this work has been provided by Atomic Energy of Canada Limited as part of their contract to support Ontario Hydro's Used Fuel Disposal Program. This support is gratefully acknowledged.
© 2000 Balkema, Rotterdam.