Uniqueness of rate-dependency, creep and stress relaxation behaviors for soft clays

Qi yin Zhu, Zhen yu Yin, Chang jie Xu, Jianhua Yin, Xiao he Xia

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)


This work focuses on the uniqueness of rate-dependency, creep and stress relaxation behaviors for soft clays under one-dimensional condition. An elasto-viscoplastic model is briefly introduced based on the rate-dependency of preconsolidation pressure. By comparing the rate-dependency formulation with the creep based formulation, the relationship between rate-dependency and creep behaviors is firstly described. The rate-dependency based formulation is then extended to derive an analytical solution for the stress relaxation behavior with defining a stress relaxation coefficient. Based on this, the relationship between the rate-dependency coefficient and the stress relaxation coefficient is derived. Therefore, the uniqueness between behaviors of rate-dependency, creep and stress relaxation with their key parameters is obtained. The uniqueness is finally validated by comparing the simulated rate-dependency of preconsolidation pressure, the estimated values of secondary compression coefficient and simulations of stress relaxation tests with test results on both reconstituted Illite and Berthierville clay.
Original languageEnglish
Pages (from-to)296-302
Number of pages7
JournalJournal of Central South University
Issue number1
Publication statusPublished - 1 Jan 2015


  • creep
  • oedometer test
  • rate-dependency
  • soft clays
  • stress relaxation

ASJC Scopus subject areas

  • Engineering(all)
  • Metals and Alloys

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