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DOI | 10.1002/2017GL075110 |
Measuring the Elastic Modulus of Snow | |
Gerling, B.; Lowe, H.; van Herwijnen, A. | |
2017-11-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:21 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland |
英文摘要 | The elastic modulus is the most fundamental mechanical property of snow. However, literature values scatter by orders of magnitude and hitherto no cross-validated measurements exists. To this end, we employ P wave propagation experiments under controlled laboratory conditions on decimeter-sized snow specimen, prepared from artificial snow and subjected to isothermal sintering, to cover a considerable range of densities (170-370 kg m(-3)). The P wave modulus was estimated from wave propagation speeds in transverse isotropic media and compared to microstructure-based finite element (FE) calculations from X-ray tomography images. Heterogeneities and size differences between acoustic and FE sample volumes were characterized by SnowMicroPen measurements, yielding an elastic modulus as a by-product. The moduli (10-340MPa) from the acoustic and FE method are in very good agreement (R-2 = 0.99) over the entire range of densities. A remaining bias (24 %) between both methods can be explained by layer heterogeneities which systematically reduce the estimates from the acoustic method. |
英文关键词 | Snow Elastic modulus Wave propagation X-ray tomography Finite Element Method |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000418572900037 |
WOS关键词 | THERMAL-CONDUCTIVITY ; CONE PENETRATION ; WAVE PROPAGATION ; MICROSTRUCTURE ; LAYERS ; MICROTOMOGRAPHY ; FRACTURE ; DENSITY ; STRESS ; ENERGY |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26370 |
专题 | 气候变化 |
作者单位 | WSL Inst Snow & Avalanche Res SLF, Davos, Switzerland |
推荐引用方式 GB/T 7714 | Gerling, B.,Lowe, H.,van Herwijnen, A.. Measuring the Elastic Modulus of Snow[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(21). |
APA | Gerling, B.,Lowe, H.,&van Herwijnen, A..(2017).Measuring the Elastic Modulus of Snow.GEOPHYSICAL RESEARCH LETTERS,44(21). |
MLA | Gerling, B.,et al."Measuring the Elastic Modulus of Snow".GEOPHYSICAL RESEARCH LETTERS 44.21(2017). |
条目包含的文件 | 条目无相关文件。 |
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