The uniaxial compressive strength of iceberg ice was determined over a wide range of strain rates from 108 to 10+1 s1 at 10°C. It was found that for strain rates less than 104 s1, strength increased in a power-law manner with strain rate. Above 104 s1, the strength was essentially constant at 4 MPa, dropping slightly between 103 and 101 s1, before rising again to a value of about 10 MPa at 10+1 s1. Thin sections of the ice revealed a small grain size of about 3.5 mm and elongated air bubbles with a ratio of length to width of about 10. In the practical strain-rate range of interest, the maximum failure stress observed was 4.8 MPa. PACS No.: 62.20
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