Seasonal Arctic summer ice extent still hard to forecast.

A new study lead by Prof Julienne Stroeve says year-to-year forecasts of the Arctic’s summer ice extent are not yet reliable.

Bookmark and Share

Rock Physics

  • Location: Room OB15b, Basement, Kathleen Lonsdale Building
  • Telephone Extension: 32410
  • Laboratory Manager:Dr Nicolas Brantut

Rock Physics - main

A range of activities are performed in this laboratory. The area houses a variety of apparatus for the Rock & Ice Physics research group.

Graduate and undergraduate experimental projects are also performed in this laboratory.

Research Equipment Includes:

Triaxial Rock Physics Ensemble
Rock Physics - triaxial vesselRock Physics - triaxial ensemble

Our servo-controlled triaxial rock deformation and rock physics ensemble can operate at confining pressures to 400 MPa and temperatures to 400ºC. It incorporates an independent 400 MPa pore fluid pressure intensifier/porosimeter/permeameter, and load is applied through a 1500 kN servo-controlled actuator. Rock samples (40mm in diameter by 100mm long) are enclosed in engineered polymer jackets with 12 transducer mounting points. This allows real-time monitoring of changes in elastic wave velocities (both P and S), electrical conductivity and electrical potential, and 3D location of acoustic emission events generated during crack propagation.

The ensemble is designed to allow us to simulate conditions throughout the seismogenic crust (upper 15 km or so) on relatively large volume samples.

Rock Physics - Rock-frac_ae
Rock Physics - SS-bas

The servo-control additionally allows us to conduct experiments over a range of constant strain rates or at controlled constant stress (for brittle creep or static fatigue tests).

Servo-controlled 200 KN universal load frame
Rock Physics - load frame

Our 200 kN universal load frame is equipped with a large volume environmental chamber to allow experiments to be conducted on rock or ice samples at temperatures from +400ºC to -200ºC.

It is also equipped with a range of fixtures for fracture mechanics experiments on rock and ice, including short rod, 3- and 4-point bend, compact tension and double torsion tests.

UCL Earth Sciences · Gower Street London WC1E 6BT · +44 (0)20 7679 2363
earthsci@ucl.ac.uk · more