rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Modeling soil
    sub title: tool interaction in a lunar soil simulant
  name:
    name part: Willman, Brian Michael
    name part: 1966-
    role:
      role term: creator
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: xx
    date issued: 1994
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xv, 263 leaves : illustrations ; 28 cm.
  abstract: With the establishment of a lunar base, or the landing of a
  abstract: robotic rover on the Moon, excavation of the lunar soil will
  abstract: be integral to the missions success. Many researchers have
  abstract: addressed the problem of lunar excavation, but most of the
  abstract: work to date has been conjecture based with a simple
  abstract: extrapolation of terrestrial excavation techniques to the
  abstract: lunar environment. In order to understand the process of
  abstract: physically removing an insitu soil mass with a tool, the
  abstract: excavation process is analyzed for its determinants. Through
  abstract: arrangement of these determinants, various excavating
  abstract: implements and techniques can be compared by virtue of their
  abstract: overall efficiency. In this arrangement of the parameters of
  abstract: excavation, it is found that force is derived from constant
  abstract: parameters. With this, it is determined that the force
  abstract: required for a tool to fail the lunar soil is the first step
  abstract: in determining its overall efficiency. Thus, it is the first
  abstract: parameter investigated in this research process. With the
  abstract: lunar soil being a vital national resource, various lunar
  abstract: soil simulants have been developed. Researchers then conduct
  abstract: experiments upon this lunar soil simulant. In this research,
  abstract: the index properties of the lunar soil simulant (JSC-1) are
  abstract: assessed and compared to that of the lunar soil. An apparatus
  abstract: that can draw tools of various configurations through the
  abstract: compacted JSC-1 lunar soil simulant is developed. It has the
  abstract: capability of variable tool speed, and measures the
  abstract: horizontal force required to fail the lunar soil simulant
  abstract: over time. Flat blades of various scale ratios are affixed
  abstract: to this apparatus and drawn through the lunar soil simulant
  abstract: while measuring force and time. Upon the conclusion of each
  abstract: test, the mode of soil failure and the dimensions of the
  abstract: ensuing rupture surfaces are recorded.
  note: by Brian Michael Willman.
  note: Vita.
  note: "Major Subject: Civil Engineering".
  note: Issued also on microfiche from University Microfilms Inc.
  note: Includes bibliographical references.
  note: Ph. D. Texas A&M University 1994.
  subject:
    topic: Major civil engineering
  identifier: 95-20497 UMI
  identifier: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  record info:
    record content source: TXA
    record creation date: 960628
    record change date: 20190325093133.0
    record identifier: in00001305228