A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Evaluating Geotechnical Characterization Methods for NEOs
Tools and method to characterize the geotechnical properties of NEOs are needed to advance exploration, science, planetary defense planning, and resource exploitation of these bodies. We are evaluating several methods to characterize NEO geotechnical properties. In this paper we focus on a dart or kinetic impact approach. We have used empirical correlations developed to predict the depth of penetration of kinetic impactors into a variety of terrestrial surfaces, called the Young penetration equations. The Young equations predict penetration of a dynamic cone penetrometer reasonably well. The largest uncertainty in designing a NEO geotechnical evaluation tool is the lack of information on expected NEO geotechnical properties. In the approach presented here this translates to selecting an appropriate Penetrability (also known as Snumber) of the NEO surface. We evaluate the problem over the full range of Young penetration equation penetrability: equivalent to dense cemented sand to soft marine sediments. The utility of the Young penetration equations is that a large dart design parameter space can be explored that includes surface penetrability, penetrator diameter, penetrator cone angle, penetrator mass, and impact velocity. The paper discusses methods and instrumentation approaches for a NEO geotechnical evaluation dart and a 3U cubesat configuration.
Evaluating Geotechnical Characterization Methods for NEOs
Tools and method to characterize the geotechnical properties of NEOs are needed to advance exploration, science, planetary defense planning, and resource exploitation of these bodies. We are evaluating several methods to characterize NEO geotechnical properties. In this paper we focus on a dart or kinetic impact approach. We have used empirical correlations developed to predict the depth of penetration of kinetic impactors into a variety of terrestrial surfaces, called the Young penetration equations. The Young equations predict penetration of a dynamic cone penetrometer reasonably well. The largest uncertainty in designing a NEO geotechnical evaluation tool is the lack of information on expected NEO geotechnical properties. In the approach presented here this translates to selecting an appropriate Penetrability (also known as Snumber) of the NEO surface. We evaluate the problem over the full range of Young penetration equation penetrability: equivalent to dense cemented sand to soft marine sediments. The utility of the Young penetration equations is that a large dart design parameter space can be explored that includes surface penetrability, penetrator diameter, penetrator cone angle, penetrator mass, and impact velocity. The paper discusses methods and instrumentation approaches for a NEO geotechnical evaluation dart and a 3U cubesat configuration.
Evaluating Geotechnical Characterization Methods for NEOs
Dreyer, C. B. (author) / Walton, O. R. (author) / Scheld, Dan (author) / Gamber, Terry (author) / Knowles, Logan (author) / Hall, David (author) / Hayden, Jefferey (author)
Earth and Space 2014 ; 2014 ; St. Louis, Missouri
Earth and Space 2014 ; 26-34
2015-06-15
Conference paper
Electronic Resource
English
| British Library Conference Proceedings | 2000
Produkttest - Drehstuhl Neos von Wilkhahn
Online Contents | 2005