Skip to Main Content
Book Chapter

Chapter 8: Creep of Solenhofen Limestone Under Moderate Hydrostatic Pressure*

By
EUGENE C. ROBERTSON
EUGENE C. ROBERTSON
Search for other works by this author on:
Published:
March 01, 1960

Stress, strain, and time observations were made of 10 solid cylinders of Solenhofen limestone compressed into the plastic range or beyond rupture; 32 observations were made of transient creep under nearly constant hydrostatic pressure and stress difference. Eighteen creep tests were made on Danby marble, Rutland White marble, and calcite, and 10 creep tests on the punching of Solenhofen limestone discs.

One to six consecutive creep tests on each specimen were made under hydrostatic pressures up to 4000 bars under stress differences from 3000 to 8000 bars at room temperature. Although the data are somewhat inexact and refer only to transient creep (measured for periods less than 3 hours), certain generalizations can be made: (1) The effect of hydrostatic pressure in decreasing the creep rate is demonstrated by the 100-fold decrease in the creep rate per unit stress difference as hydrostatic pressure is increased from 1000 bars to 2000 bars. (2) The similarity of creep behavior of obviously highly fractured specimens to those apparently deformed wholly by plastic flow suggests that fracturing is one of the principal mechanisms of creep in limestone. Healing of fractures is indicated by recovery of deformation upon unloading. (3) Two empirical laws were found to satisfy the creep data: a logarithmic relation for strain-time data,  
· = t i 1
and a linear power law for the strain rate-stress difference data,  
t · = k 1 σ D k 2

A dimensionless strain ratio, t∈̇/∈ and a dimensionless stress ratio, (σz - σ m )/σ m , were found to be parameters respectively of fracturing and of ductility for limestone.

You do not currently have access to this article.
Don't already have an account? Register

Figures & Tables

Contents

GSA Memoirs

Rock Deformation (A Symposium)

David Griggs
David Griggs
Search for other works by this author on:
John Handin
John Handin
Search for other works by this author on:
Geological Society of America
Volume
79
ISBN print:
9780813710792
Publication date:
March 01, 1960

GeoRef

References

Related

A comprehensive resource of eBooks for researchers in the Earth Sciences

This Feature Is Available To Subscribers Only

Sign In or Create an Account

This PDF is available to Subscribers Only

View Article Abstract & Purchase Options

For full access to this pdf, sign in to an existing account, or purchase an annual subscription.

Subscribe Now