Fracture toughness of snow in shear under friction

被引：18

作者：

Kirchner, HOK

Michot, G

Schweizer, J ^{[1
]}

机构：

[1] Swiss Fed Inst Snow & Avalanche Res SLF, CH-7260 Davos, Switzerland

[2] Univ Paris 11, Inst Sci Mat, F-91405 Orsay, France

[3] Ecole Mines, Phys Mat Lab, F-54042 Nancy, France

来源：

PHYSICAL REVIEW E | 2002年 / 66卷 / 02期

关键词：

D O I：

10.1103/PhysRevE.66.027103

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The fracture toughness of snow in shear is one of the most relevant parameters when studying the mechanics of snow slab avalanche release. Double-cantilever snow beams were loaded asymmetrically to determine K-IIc. If crack surfaces touch under applied pressure, the fracture toughness in shear of snow (rho=247 kg m(-3)) is K-IIc=680+/-60 Pa m(1/2). Screening of the stress intensity at the crack tip occurs by Newtonian friction with k=1.3+/-0.47 along the crack faces.

引用

页码：1 / 027103

页数：3

共 16 条

[1]

Anderson T.A., 1995, FRACTURE MECH

[2] MODE-2 STRESS-INTENSITY FACTORS FOR CRACKED WOOD BEAMS [J].

BARRETT, JD ;

FOSCHI, RO .

ENGINEERING FRACTURE MECHANICS, 1977, 9 (02) :371-&

[3]

CASASSA G, 1989, ANN GLACIOL, V13, P40, DOI DOI 10.3189/S0260305500007618

[4]

COLBECK C, 1990, INT CLASSIFICATIOND

[5] Fracture toughness of snow in shear and tension [J].

Kirchner, HOK ;

Michot, G ;

Schweizer, J .

SCRIPTA MATERIALIA, 2002, 46 (06) :425-429

[6]

Kirchner HOK, 2001, PHILOS MAG A, V81, P2161, DOI 10.1080/01418610010029043

[7] Creep instability of the weak layer and natural slab avalanche triggerings [J].

Louchet, F .

COLD REGIONS SCIENCE AND TECHNOLOGY, 2001, 33 (2-3) :141-146

[8]

LOUCHET F, 2001, 26 GEN ASS EUR GEOPH

[9]

McClung D., 1993, AVALANCHE HDB

[10] FRACTURE MECHANICAL MODELS OF DRY SLAB AVALANCHE RELEASE [J].

MCCLUNG, DM .

JOURNAL OF GEOPHYSICAL RESEARCH, 1981, 86 (NB11) :783-790

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