Physics of Soft Impact and Cratering

This book focuses on the impact dynamics and cratering of soft matter to describe its importance, difficulty, and wide applicability to planetary-related problems. A comprehensive introduction to the dimensional analysis and constitutive laws that are necessary to discuss impact mechanics and cratering is first provided. Then, particular coverage is given to the impact of granular matter, which is one of the most crucial constituents for geophysics. While granular matter shows both solid-like and fluid-like behaviors, neither solid nor fluid dynamics is sufficient to fully understand the physics of granular matter. In order to reveal its fundamental properties, extensive impact tests have been carried out recently. The author reveals the findings of these recent studies as well as what remains unsolved in terms of impact dynamics. Impact crater morphology with various soft matter impacts also is discussed intensively. Various experimental and observational results up to the recent Itokawa asteroid's terrain and nanocrater are reviewed and explained mainly by dimensional analysis. The author discusses perspectives of the relation between soft matter physics and planetary science, because it is an important step towards unifying physics and planetary science, in both of which fields crater morphology has been studied independently.

Links granular physics and planetary science through impact cratering Discusses essential factors of soft matter impacts based on various experimental results and intuitive dimensional analysis Provides a fundamental basis of the scaling concept and constitutive laws to understand impact dynamics

Autorentext
Hiroaki Katsuragi, Associate Professor
Department of Earth and Environmental Sciences,
Nagoya University, Furocho, Chikusa, Nagoya 464-8601, Japan.

Inhalt
Introduction.- Scaling and dimensional analysis.- Constitutive laws.- Soft drag force.- Morphology of planetary impact craters.- Soft impact cratering.- Grains and dust dynamics.- Perspectives.

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