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  • 1
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    User's Manual for Space Debris Surfaces (SD_SURF) (1996)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A unique collection of computer codes, Space Debris Surfaces (SD_SURF), have been developed to assist in the design and analysis of space debris protection systems. SD_SURF calculates and summarizes a vehicle's vulnerability to space debris as a function of impact velocity and obliquity. An SD_SURF analysis will show which velocities and obliquities are the most probable to cause a penetration. This determination can help the analyst select a shield design which is best suited to the predominant penetration mechanism. The analysis also indicates the most suitable parameters for development or verification testing. The SD_SURF programs offer the option of either FORTRAN programs and Microsoft EXCEL spreadsheets and macros. The FORTRAN programs work with BUMPERII version 1.2a or 1.3 (Cosmic released). The EXCEL spreadsheets and macros can be used independently or with selected output from the SD_SURF FORTRAN programs.
    Keywords: Spacecraft Design, Testing and Performance
    Type: NASA-CR-4705 , NAS 1.26:4705 , M-799
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Structural Damage Prediction and Analysis for Hypervelocity Impacts: Handbook (1996)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: This handbook reviews the analysis of structural damage on spacecraft due to hypervelocity impacts by meteoroid and space debris. These impacts can potentially cause structural damage to a Space Station module wall. This damage ranges from craters, bulges, minor penetrations, and spall to critical damage associated with a large hole, or even rupture. The analysis of damage depends on a variety of assumptions and the area of most concern is at a velocity beyond well controlled laboratory capability. In the analysis of critical damage, one of the key questions is how much momentum can actually be transfered to the pressure vessel wall. When penetration occurs without maximum bulging at high velocity and obliquities (if less momentum is deposited in the rear wall), then large tears and rupture may be avoided. In analysis of rupture effects of cylindrical geometry, biaxial loading, bending of the crack, a central hole strain rate and R-curve effects are discussed.
    Keywords: Spacecraft Design, Testing and Performance
    Type: NASA-CR-4706 , NAS 1.26:4706 , M-800
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    External tank space debris considerations (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Orbital debris issues associated with maintaining a Space Shuttle External Tank (ET) on orbit are presented. The first issue is to ensure that the ET does not become a danger to other spacecraft by generating space debris, and the second is to protect the pressurized ET from penetration by space debris or meteoroids. Tests on shield designs for penetration resistance showed that when utilized with an adequate bumper, thermal protection system foam on the ET is effective in preventing penetration.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: AIAA PAPER 92-1411
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Space Debris Surfaces - Probability of no penetration versus impact velocity and obliquity (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A collection of computer codes called Space Debris Surfaces (SD-SURF), have been developed to assist in the design and analysis of space debris protection systems. An SD-SURF analysis will show which obliquities and velocities are most likely to cause a penetration to help the analyst select a shield design best suited to the predominant penetration mechanism. Examples of the interaction between space vehicle geometry, the space debris environment, and the penetration and critical damage ballistic limit surfaces of the shield under consideration are presented.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: AIAA PAPER 92-1407
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 5
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    Fracture mechanics expert system (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Attention is given to fracture mechanics, an analytical method used extensively in the National Space Transportation System to conservatively predict the remaining service life of an article when a flaw or a material defect is detected. These analyses are performed on hardware containing material defects that have been detected by various nondestructive inspection techniques. An expert system being developed to streamline the process so that hardware dispositions may be obtained in a timely and consistent manner is discussed. The expert system reduces the potential for errors due to the manual transcription between the various software programs involved in completing a fracture mechanics analysis. NEXPERT Object, the expert system development shell selected for this purpose, allows the various software programs used in fracture mechanics analyses to be accessed and manipulated from the same platform.
    Keywords: CYBERNETICS
    Type: AIAA PAPER 92-0876
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Space Debris Surfaces (Computer Code): Probability of No Penetration Versus Impact Velocity and Obliquity (1995)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A unique collection of computer codes, Space Debris Surfaces (SD_SURF), have been developed to assist in the design and analysis of space debris protection systems. SD_SURF calculates and summarizes a vehicle's vulnerability to space debris as a function of impact velocity and obliquity. An SD_SURF analysis will show which velocities and obliquities are the most probable to cause a penetration. This determination can help the analyst select a shield design that is best suited to the predominant penetration mechanism. The analysis also suggests the most suitable parameters for development or verification testing. The SD_SURF programs offer the option of either FORTRAN programs or Microsoft-EXCEL spreadsheets and macros. The FORTRAN programs work with BUMPERII. The EXCEL spreadsheets and macros can be used independently or with selected output from the SD_SURF FORTRAN programs. Examples will be presented of the interaction between space vehicle geometry, the space debris environment, and the penetration and critical damage ballistic limit surfaces of the shield under consideration.
    Keywords: Structural Mechanics
    Type: NASA-CR-200969 , NAS 1.26:200969 , AIAA Paper 92-1407 , MAF/MMA-31-100(3/95) , Space Programs and Technologies Conference; Mar 24, 1992 - Mar 27, 1992; Huntsville, AL; United States
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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