Encyclopedia of Engineering Geology

Living Edition
| Editors: Peter Bobrowsky, Brian Marker

Bulk modulus

  • Jeffrey R. Keaton
Living reference work entry
DOI: https://doi.org/10.1007/978-3-319-12127-7_38-1

Definition

Bulk modulus (K) is the ratio of hydrostatic stress (p) on an object to the resulting volumetric strain (εv), which is the ratio of volume change (ΔV) to the initial volume (Vo).

Hydrostatic stress cannot produce shear stress ; however, principal stress acting in one direction produces strain in all three directions, as described by Hooke’s law and Poisson’s ratio ( ν). Therefore,
$$ {\varepsilon}_v = {\varepsilon}_x+{\varepsilon}_y+{\varepsilon}_z $$
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References

  1. Mott PH, Dorgan JR, Roland CM (2008) The bulk modulus and Poisson’s ratio of “incompressible” materials. J Sound Vib 312:572–575CrossRefGoogle Scholar

Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  1. 1.Amec Foster WheelerLos AngelesUSA