DOI: 10.1002/2013GL058078
论文题名: Numerical simulation of microstructural damage and tensile strength of snow
作者: Hagenmuller P. ; Theile T.C. ; Schneebeli M.
刊名: Geophysical Research Letters
ISSN: 0094-10512
EISSN: 1944-10243
出版年: 2014
卷: 41, 期: 1 起始页码: 86
结束页码: 89
语种: 英语
英文关键词: avalanche
; fracture
; micro-tomography
; simulation
; snow
Scopus关键词: Elastic properties
; Failure process
; Micro-structural
; Micro-structural damages
; Micro-tomography
; Modeling procedure
; simulation
; Weibull modulus
; Finite element method
; Fracture
; Ice
; Mechanical properties
; Microstructure
; Snow
; Tensile strength
; Tomography
; Avalanches (snowslides)
; compressive strength
; elastic property
; failure analysis
; finite difference method
; microstructure
; microtopography
; simulation
; snow
; tensile strength
英文摘要: This contribution uses finite-element analysis to simulate microstructural failure processes and the tensile strength of snow. The 3-D structure of snow was imaged by microtomography. Modeling procedures used the elastic properties of ice with bond fracture assumptions as inputs. The microstructure experiences combined tensile and compressive stresses in response to macroscopic tensile stress. The simulated nonlocalized failure of ice lattice bonds before or after reaching peak stress creates a pseudo-plastic yield curve. This explains the occurrence of acoustic events observed in advance of global failure. The measured and simulated average tensile strengths differed by 35%, a typical range for strength measurements in snow given its low Weibull modulus. The simulation successfully explains damage, fracture nucleation, and strength according to the geometry of the microstructure of snow and the mechanical properties of ice. This novel method can be applied to more complex snow structures including the weak layers that cause avalanches. Key Points Strength and damage of snow was simulated based on the 3-D microstructure Measured and simulated tensile strength differs by 35\%, as in experimental data Significant damage before peak stress explains observed acoustic events ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896709299&doi=10.1002%2f2013GL058078&partnerID=40&md5=33b1b61e7fbdb58137fb63a83b20dee8
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7776
Appears in Collections: 气候减缓与适应
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作者单位: Irstea, UR ETGR, St Martin d'Hères, France
Recommended Citation:
Hagenmuller P.,Theile T.C.,Schneebeli M.. Numerical simulation of microstructural damage and tensile strength of snow[J]. Geophysical Research Letters,2014-01-01,41(1).