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Jul 11, 2012
Sand Impact Tests of a Half-Scale Crew Module Boilerplate Test Article
Authors: Gregory J. Vassilakos [email protected] and Robin C. Hardy [email protected]Author Affiliations
Publication: Earth and Space 2012: Engineering, Science, Construction, and Operations in Challenging Environments
Abstract
Although the Orion Multi-Purpose Crew Vehicle (MPCV) is being designed primarily for water landings, a further investigation of launch abort scenarios reveals the possibility of an onshore landing at Kennedy Space Center (KSC). To gather data for correlation against simulations of beach landing impacts, a series of sand impact tests were conducted at NASA Langley Research Center (LaRC). Both vertical drop tests and swing tests with combined vertical and horizontal velocity were performed onto beds of common construction-grade sand using a geometrically scaled crew module boilerplate test article. The tests were simulated using the explicit, nonlinear, transient dynamic finite element code LS-DYNA. The material models for the sand utilized in the simulations were based on tests of sand specimens. Although the LS-DYNA models provided reasonable predictions for peak accelerations, they were not always able to track the response through the duration of the impact. Further improvements to the material model used for the sand were identified based on results from the sand specimen tests.
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© 2012 American Society of Civil Engineers.
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Published online: Jul 11, 2012
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Analytical Services & Materials, NASA Langley Research Center, Mail Stop 230, Hampton, VA 23681. E-mail: [email protected]
NASA Langley Research Center, Mail Stop 495, Hampton, VA 23681. E-mail: [email protected]
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