# Uniaxial compression strength versus hydrostatic / triaxial

1. Oct 26, 2015

### rollingstein

For typical metals used in construction I've seen the compression strength being used in various calculations. Typically I assume this is the uniaxial compressive strength. i.e. Say in a UTM with the specimen laterally loaded.

Are there engineering situations where the hydrostatic compressive strength of materials is important? This strength seems much larger than the uniaxial strength & is tested in a setup where a piston & oil produce lateral uniform loadings on the test sample.

2. Nov 1, 2015