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ASTM Selected Technical Papers
Fracture Mechanics: Perspectives and Directions (Twentieth Symposium)
By
RP Wei
RP Wei
1
Lehigh University
,
Bethlehem, PA
.
Search for other works by this author on:
RP Gangloff
RP Gangloff
2
University of Virginia
,
Charlottesville, VA
.
Search for other works by this author on:
ISBN-10:
0-8031-1250-5
ISBN:
978-0-8031-1250-6
No. of Pages:
709
Publisher:
ASTM International
Publication date:
1989

During fatigue crack propagation in sufficiently thin metallic sheets, shear lips develop which spread throughout the material thickness. This leads to a situation where, in addition to a Mode I component of deformation, there is also a Mode III component. Finite-element calculations are carried out on several geometries in an attempt to assess the effect of this additional deformation upon catastrophic failure and fatigue crack propagation. for these particular geometries, it is shown that the slant crack is less dangerous than the flat crack with regard to catastrophic failure and, when propagating in fatigue, may grow faster or slower than the flat crack.

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