COARSE-GRAINED DEBRIS-FLOWS: HYSTERESIS AND TIME-DEPENDENT RHEOLOGY. TECHNICAL NOTE

Rheometer tests of coarse-grained debris-flow material show hysteresis of yield stress, the degree of which depends on maximum grain size, solids concentration, and normal stress. Coarse-grained debris-flow material did not exhibit well-defined flow curves based on instantaneous data; shear stresses at a given shear rate varied between +/- 50-100% of the mean value. Over periods of seconds to minutes this variability is accompanied by more gradual variation of shear stress at constant shear rate. The rheometry of coarse-grained debris-flows resembles that of dense suspensions in its poor precision and reproducibility of viscometric data.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/8672558
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Contreras, S M
  • Davies, TRH
• Publication Date: 2000-12

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 938-941
• Serial:
  • Journal of Hydraulic Engineering
  • Volume: 126
  • Issue Number: 12
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9429
  • Serial URL: https://ascelibrary.org/journal/jhend8

Subject/Index Terms

• TRT Terms: Coarse grained materials; Debris flows; Flow; Grain size (Geology); Hysteresis; Rheology; Shear stress; Time dependence; Viscometers; Yield stress
• Subject Areas: Geotechnology; Highways; Hydraulics and Hydrology; I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 00803985
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 12 2001 12:00AM