Brittle failure of ice
WebMay 1, 2024 · Numerical modeling for the brittle failure of ice in the laboratory scale is scarce, primarily because of the challenge of the complex characteristics of ice and the demand for more advanced numerical methods. In this study, the brittle behaviors of the ice specimen are modeled with PSM introduced above. The variation of the parameters, … WebOct 1, 1995 · Experiments were performed on orthotropic columnar fresh-water ice of ≈ 6mm column diamter proportionally loaded across the columns under biaxial compression at −10°C under various combinations of strain rate and stress ratio, R = σ 22 /σ 11.The ductile-to-brittle transition strain rate increased from about 8 × 10 −5 s −1 under no confinement …
Brittle failure of ice
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WebMar 10, 1997 · The brittle compressive failure of cubes of columnar saline ice was studied under triaxial (proportional) loading where the ratio of normal stresses (σ 11:σ 22:σ 33:) was varied in a systematic manner using a true multiaxial loading system.The strain rate in the direction of the greatest applied compressive stress was 6×10 −3 s −1 and the … WebAug 7, 1997 · The brittle compressive strength is related to ice−ice friction. Modeling and experiment suggest that the transition strain rate of cracked ice scales as (crack size) …
WebMar 1, 2011 · 2.3. Brittle damage model for ice. In order to model the distributed brittle cracking phenomenon in ice projectile during impact, the damage model proposed by Camacho and Ortiz (1996) is followed. It should be mentioned here, that the proposed damage model does not incorporate the micro-structural behavior of ice (taking into … Web8.3 Brittle fracture. Brittle fracture is a failure mode of great concern to welding engineers. Once initiated, it is a fast and unstable type of fracture. There is no advance warning and …
WebSep 8, 2024 · The ice exhibited brittle behavior over all χ paths; that is, the applied stress, after increasing more or less linearly with increasing strain, dropped suddenly as terminal failure set in. Failure occurred once the ice had shortened by 0.15–0.3%, through the development of a Coulombic fault inclined at θ = 27 ± 3° to the direction of ... WebJan 1, 2002 · New experiments have been performed on the brittle compressive failure of columnar-grained, first-year sea ice with the S2 growth texture, harvested from the …
WebJan 1, 2002 · Brittle Failure of Ice. Reviews in Mineralogy and Geochemistry (2002) 51 (1): 201–252. Ice exhibits either ductile or brittle behavior, depending upon the conditions under which it is loaded. Glaciers, for instance, are loaded by gravity, under deviatoric stresses of ~0.1 MPa or lower. At temperatures of interest, they flow through ... poetry handlesWebFeb 1, 2010 · Introduction. Compressive failure more often than not occurs under a multi-axial state of stress. For example, during the interaction between a floating ice feature and an engineered structure, material within the contact zone is compressed not only along the direction of impact, but also in orthogonal directions, owing to constraint imposed by … poetry handbookWebJun 1, 2024 · Schulson (1990) studied experimentally brittle compressive failure of granular ice at temperatures from −10 °C to −50 °C for grain diameters from 1 to 10 mm. The prepared ice was transparent with low porosity. The density of the ice was 916.2 kg/m 3 and it was free of cracks. poetry handsWebAug 30, 2001 · Brittle failure limits the compressive strength of rock and ice when rapidly loaded under low to moderate confinement. Higher confinement or slower loading results … poetry harborWebDec 31, 1995 · @article{osti_175214, title = {A failure surface for brittle failure of orthotropic (columnar) saline ice under triaxial compression}, author = {Gratz, E T and Schulson, E M}, abstractNote = {Experimental results are presented from triaxial compression tests conducted at -10{degrees}C on orthotropic S2 (columnar) saline ice … poetry handbook mary oliver pdfWebJan 1, 2014 · Under high confinement adiabatic instability can lead to brittle-like failure. • A new model gives the failure stress for failure under high confinement. • New model … poetry handoutsWebSep 16, 1986 · The micromechanics of brittle failure in compression and the transition from brittle to ductile failure, observed under increasing confining pressures, are eaxamined in the light of existing ... poetry harrogate