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    • Flow laws in polymineralic aggregates deformed by a combination of diffusion creep and dislocation creep

      Dilip Saha

      Volume 106 Issue 4 December 1997 pp 221-224

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jess/106/04/0221-0224

    • Keywords

       

      Diffusion creep; dislocation creep; flow law; uniform stress; uniform strain rate bounds

    • Abstract

       

      Microstructures in naturally deformed rocks in the upper crust demonstrate that creep strain in nature may be accommodated by a combination of dislocation creep, diffusion/dissolution processes and microcracking. A theoretical approach towards deriving an aggregate flow law is presented, where the strain in the constituent phases is assumed to occur by simultaneous operation of diffusive mass transfer and crystal plastic mechanisms (dislocation creep). Both uniform stress and uniform strain rate situations are considered.

    • Author Affiliations

       

      Dilip Saha1

      1. Geological Studies Unit, Indian Statistical Institute, 203 B. T. Road, Calcutta - 700 035, India

    • Dates

       
      Published
      December 1997

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