Repeated Compression-Annealing Experiments on Anisotropic Core Ice

• Main Authors: Maohuan, Huang, Wenti, Wang, Jun, Li, Gang, Li
• Format: Article in Journal/Newspaper
• Language: English
• Published: Polar Research Institute of China - PRIC 1991
• Subjects: Advances in Polar Science; ice core; Polar Science
• Online Access: http://library.arcticportal.org/2026/; http://library.arcticportal.org/2026/1/A19910103.pdf

Three runs (6 samples) of repeated uniaxial compression-annealing experiments were conducted on a creep testing machine with a loading accuracy of 1% at -2 (plus/minus)0.2°C. The tested samples were cut from BHQ ice core. Compression axes were parallel, at an angle of 45° and normal to the vertical of the core respectively. The initial orientation fabrics of samples were single-maximum pattern or approximate single maximum pattern with different mean grain size. The sample was compressed with an initial axial stress of 0.8 MPa, until 10% axial strain was obtained, and then annealed for 72 hours. Such compression-annealing procedure was repeated 6 times for a run.