A icrj a cr

Therefore substituting in (1),

Ee\ = ctj (1 + v) — 3 vo But the volumetric stress a may also be written in terms of the bulk modulus,

volumetric stress volumetric strain but volumetric strain = sum of the three linear strains

Substituting in (2),

But, mean strain

Alternatively, re-writing eqn. (8.16) in terms of £), o\ 3i>

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