Mathematics – Logic
Scientific paper
Jul 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.2521w&link_type=abstract
Geophysical Research Letters, Volume 28, Issue 13, p. 2521-2524
Mathematics
Logic
24
Physical Properties Of Rocks: Fracture And Flow, Physical Properties Of Rocks: Microstructure, Physical Properties Of Rocks: Permeability And Porosity
Scientific paper
Since dilatancy is generally observed as a precursor to brittle faulting and the development of shear localization, attention has focused on how localized failure develops in a dilatant rock. However, recent geologic observations and reassessment of bifurcation theory have indicated that strain localization may be pervasive in a compactant porous rock. The localized bands can be in shear or in compaction, and oriented at relatively high angles (up to 90°) to the maximum compression direction. Here we report microstructural characterization of the spatial distribution of damage in failed samples which confirms that compaction bands and high-angle conjugate shears can develop in sandstones with porosities ranging from 13% to 28%. These failure modes are generally associated with stress states in the transitional regime from brittle faulting to cataclastic ductile flow. The laboratory results suggest that these complex localized features can be pervasive in sandstone formations, not just limited to aeolian sandstone in which they were first documented. They may significantly impact the stress field, strain partitioning and fluid transport in sedimentary formations and accretionary prisms. While bifuraction theory provides an useful framework for analyzing the inception of localization, our data rule out a constitutive model that does not account for the activation of multiple damage mechanisms in the transitional regime.
Baud Patrick
Klein Emmanuelle
Wong Teng-Fong
No associations
LandOfFree
Localized failure modes in a compactant porous rock does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Localized failure modes in a compactant porous rock, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Localized failure modes in a compactant porous rock will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1199840