H.H. Shen – författare

Recording the proceedings of the IUTAM Symposium held in Fairbanks, Alaska, in 2000, this book addresses a variety of scaling issues in ice mechanics and ice dynamics, ranging over planetary ice mechanics, ice forces on offshore structures, fracture of ice, friction, constitutive and failure modelling, and ice dynamics models, as well as textural and structural transformations in the drifting ice of the polar regions. The 39 articles focus on small and large scales in the study of ice, the failure mechanics of heterogeneous media, and multi-scale statistical physics. Guidance is provided as to the range of applicability of different fracture, constitutive, and ice dynamics models, and attempts are made to link the behaviour at smaller scales with successive geophysical scales. This book should be useful to researchers in ice mechanics and ice dynamics, and to those who wish to gain an overview of the subject.

The 45 papers presented in this volume all share the common goal of constructing continuum models based on the micro behaviours of granular materials. Computer simulations continue to provide observations to aid modelling, while new experimental works begin to show promise for increased understanding in this area. Theoretical studies have extended into transitions between the rapid and quasi-static regimes and the fluid and solid mixture flows. Exciting new topics discussed in this volume include: concepts of a measure for randomness in quasi-static granular materials, which is analogous to the granular temperature in a rapid flow; scaling effects in granular media and their implications in both physical and computer simulations; instability; and boundary effects on heterogeneous behavior in simple flow configurations, which are posing new challenges for mathematical modelling. The volume will prove indispensable reading for researchers interested in the current developments in the fundamental aspects of mechanics of granular materials.

This Volume constitutes the Proceedings of the IUTAM Symposium on 'Scaling Laws in Ice Mechanics and Ice Dynamics', held in Fairbanks, Alaska from 13th to 16th of June 2000. Ice mechanics deals with essentially intact ice: in this discipline, descriptions of the motion and deformation of Arctic/ Antarctic and river/lake ice call for the development of physically based constitutive and fracture models over an enormous range in scale: 0.01 m - 10 km. Ice dynamics, on the other hand, deals with the movement of broken ice: descriptions of an aggregate of ice floes call for accurate modeling of momentum transfer through the sea/ice system, again over an enormous range in scale: 1 km (floe scale) - 500 km (basin scale). For ice mechanics, the emphasis on lab-scale (0.01 - 0.5 m) research con­ trasts with applications at the scale of order 1 km (ice-structure interaction, icebreaking); many important upscaling questions remain to be explored.