| タイトル | Constitutive Soil Properties for Mason Sand and Kennedy Space Center |
| 本文（外部サイト） | http://hdl.handle.net/2060/20120000504 |
| 著者（英） | Chitty, Daniel E.; Thomas, Michael A. |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 2011-12-01 |
| 言語 | eng |
| 内容記述 | Accurate soil models are required for numerical simulations of land landings for the Orion Crew Exploration Vehicle (CEV). This report provides constitutive material models for two soil conditions at Kennedy Space Center (KSC) and four conditions of Mason Sand. The Mason Sand is the test sand for LaRC s drop tests and swing tests of the Orion. The soil models are based on mechanical and compressive behavior observed during geotechnical laboratory testing of remolded soil samples. The test specimens were reconstituted to measured in situ density and moisture content. Tests included: triaxial compression, hydrostatic compression, and uniaxial strain. A fit to the triaxial test results defines the strength envelope. Hydrostatic and uniaxial tests define the compressibility. The constitutive properties are presented in the format of LSDYNA Material Model 5: Soil and Foam. However, the laboratory test data provided can be used to construct other material models. The soil models are intended to be specific to the soil conditions they were tested at. The two KSC models represent two conditions at KSC: low density dry sand and high density in-situ moisture sand. The Mason Sand model was tested at four conditions which encompass measured conditions at LaRC s drop test site. |
| NASA分類 | Engineering (General) |
| レポートNO | NASA/CR-2011-217323
NF1676L-13996 |
| 権利 | Copyright, Distribution under U.S. Government purpose rights |
