書誌事項
- タイトル別名
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- Experimental study on the mechanical strength of ice-silica particle mixtures
- コオリ シリカ ビリュウシ コンゴウブツ ノ リキガク キョウド ニ カンスル ジッケンテキ ケンキュウ
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conducted deformation experiments of ice -1μm silica beads mixtures to clarify the e ects of silica beads volume fraction and temperature on the flow law. The silica beads volume fraction,φ, was changed from 0 to 0.63 to simulate the surfaces of icy bodies like layered structures on Mars polar region, and two color regions on Ganymede. Unconfined uniaxial compression tests were made in a cold room at the temperatures from -10 to -25℃ in ILTS, Hokkaido University and we set constant strain rates ranged from 2.9×10-3 to 8.5×10-7 s-1. We determined the flow law of mixture written by ε=A・σmax nfrom the relationship between maximum stress,σmax, on the stressstrain curve and applied strain rate,ε. At -10℃, the mixtures with silica volume fractions of 0.004- 0.04 had almost the same maximum stress with pure ice and the stress exponent,n,is about 3. On the other hands, at the silica volume fractions more than 0.15 , the mixture became harder as silica volume fraction increased, and it also had the same stress exponent, about 6. Also, we found that A for silica volume fractions more than 0.15 was written by an exponential equation related to silica volume fraction, A=6.86×10-8 exp (-6.35φ). Furthermore, we found that n of 0.15 was independent of temperature, about 6.2, and the brittle-ductile boundary of φ=0.29 and 0.63 was 30-50℃ higher than that of pure ice.
収録刊行物
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- 雪氷
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雪氷 71 (5), 377-385, 2009
公益社団法人 日本雪氷学会
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詳細情報 詳細情報について
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- CRID
- 1390569335609757184
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- NII論文ID
- 10025591529
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- NII書誌ID
- AN00131221
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- ISSN
- 18836267
- 03731006
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- NDL書誌ID
- 10438930
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- KAKEN
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- 使用不可