Dynamic Finite Element Predictions for Mars Sample Return Cellular Impact Test #4 PDF Download
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Author: Edwin L. Fasanella
Publisher:
ISBN:
Category : Astrodynamics
Languages : en
Pages : 28
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Book Description
The nonlinear, transient dynamic finite element code, MSC. Dytran, was used to simulate an impact test of an energy absorbing Earth Entry Vehicle (EEV) that will impact without a parachute. EEV's are designed to return materials from asteroids, comets, or planets for laboratory analysis on Earth. The EEV concept uses an energy absorbing cellular structure designed to contain and limit the acceleration of space exploration samples during Earth impact. The spherical shaped cellular structure is composed of solid hexagonal and pentagonal foam-filled cells with hybrid graphite-epoxy/Kevlar cell walls. Space samples fit inside a smaller sphere at the center of the EEV's cellular structure. Pre-test analytical predictions were compared with the test results from a bungee accelerator.
Author: Edwin L. Fasanella
Publisher:
ISBN:
Category : Astrodynamics
Languages : en
Pages : 28
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Book Description
The nonlinear, transient dynamic finite element code, MSC. Dytran, was used to simulate an impact test of an energy absorbing Earth Entry Vehicle (EEV) that will impact without a parachute. EEV's are designed to return materials from asteroids, comets, or planets for laboratory analysis on Earth. The EEV concept uses an energy absorbing cellular structure designed to contain and limit the acceleration of space exploration samples during Earth impact. The spherical shaped cellular structure is composed of solid hexagonal and pentagonal foam-filled cells with hybrid graphite-epoxy/Kevlar cell walls. Space samples fit inside a smaller sphere at the center of the EEV's cellular structure. Pre-test analytical predictions were compared with the test results from a bungee accelerator.
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781721264070
Category :
Languages : en
Pages : 40
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Book Description
The nonlinear, transient dynamic finite element code, MSC.Dytran, was used to simulate an impact test of an energy absorbing Earth Entry Vehicle (EEV) that will impact without a parachute. EEVOs are designed to return materials from asteroids, comets, or planets for laboratory analysis on Earth. The EEV concept uses an energy absorbing cellular structure designed to contain and limit the acceleration of space exploration samples during Earth impact. The spherical shaped cellular structure is composed of solid hexagonal and pentagonal foam-filled cells with hybrid graphite-epoxy/Kevlar cell walls. Space samples fit inside a smaller sphere at the center of the EEVOs cellular structure. Pre-test analytical predictions were compared with the test results from a bungee accelerator. The model used to represent the foam and the proper failure criteria for the cell walls were critical in predicting the impact loads of the cellular structure. It was determined that a FOAM1 model for the foam and a 20% failure strain criteria for the cell walls gave an accurate prediction of the acceleration pulse for cellular impact. Fasanella, Edwin L. and Billings, Marcus D. Langley Research Center NASA/TM-2001-211023, L-18087, NAS 1.15:211023, ARL-TR-2539
Author: Marcus Dwight Billings
Publisher:
ISBN:
Category : Impact
Languages : en
Pages : 90
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Book Description
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 738
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 166
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 312
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 594
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Book Description
Author: James S. Noel
Publisher:
ISBN:
Category : Solid propellant rockets
Languages : en
Pages : 124
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Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 390
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Book Description
Author: Justin Filiberto
Publisher: Elsevier
ISBN: 012804201X
Category : Science
Languages : en
Pages : 427
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Book Description
Volatiles in the Martian Crust is a vital reference for future missions - including ESA's EXO Mars and NASA's Mars2020 rover - looking for evidence of life on Mars and the potential for habitability and human exploration of the Martian crust. Mars science is a rapidly evolving topic with new data returned from the planet on a daily basis. The book presents chapters written by well-established experts who currently focus on the topic, providing the reader with a fresh, up-to-date and accurate view. Organized into two main sections, the first half of the book focuses on the Martian meteorites and specific volatile elements. The second half of the book explores processes and locations on the crust, including what we have learned about volatile mobility in the Martian crust. Coverage includes data from orbiter and in situ rovers and landers, geochemical and geophysical modeling, and combined data from the SNC meteorites. - Presents information about the nature, relationship, and reactivity of chemical elements and compounds on Mars - Explores the potential habitability of Mars - Provides a comprehensive view of volatiles in the Martian crust from studies of actual samples as well as from the variety of landed missions, including the MER and Curiosity rovers - Delivers a vital reference for ongoing and future missions to Mars while synthesizing large data sets and research on volatiles in the Martian atmosphere - Concludes with an informative summary chapter that looks to future Mars missions and what might be learned
