Technical Requirements for Lunar Structures

Jablonski, Alexander M.; Ogden, Kelly A.

doi:10.1061/(asce)0893-1321(2008)21:2(72)

Cited by 36 publications

(5 citation statements)

References 15 publications

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“…It has been shown that the convection has negligible effects in hollow spheres with diameters less than 4 mm [10]. In addition, the flux due to radiation typically does not control heat transfer in composite foams [11]. As such, this study only considers conduction to model the flame retardant behavior of CMF.…”

Section: Flame Test Modelmentioning

confidence: 98%

Experimental and computational studies on the thermal behavior and fire retardant properties of composite metal foams

Chen

Marx

Rabiei

2016

International Journal of Thermal Sciences

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a b s t r a c tA comprehensive experimental and computational evaluation of thermal behavior and fire retardant properties of composite metal foams (CMFs) is reported in this study. Thermal behavior characterizations were carried out through specific heat, effective thermal conductivity, and coefficient of thermal expansion analyses using differential scanning calorimetry, high temperature guarded-comparativelongitudinal heat flow technique, and thermomechanical analyzer (TMA), respectively. The experimental results were compared with analytical results obtained from, respectively, rule of mixture, Brailsford and Major's model, and modified Turner's model for verification. United States Nuclear Regulatory Commission (USNRC) standards were employed as regulatory standards and criteria for fire retardant property study. The results revealed a superior thermal resistance and fire survivability of CMFs compared to 304L stainless steel. A physics-based three-dimensional model accounting for heat conduction was built using Finite Element Analysis to validate the reliability of the experimental results. The model led to a good reproduction of the experimentally measured data when comparing CMF to bulk stainless steel. This research indicates that one of the potential applications of lightweight CMFs can be in nuclear spent fuel casks replacing conventional structural and radiation shielding materials with demonstrated benefits of excellent thermal isolation, fire retardant, light weight and energy absorption capabilities.

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Section: Flame Test Modelmentioning

confidence: 98%

Experimental and computational studies on the thermal behavior and fire retardant properties of composite metal foams

Chen

Marx

Rabiei

2016

International Journal of Thermal Sciences

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“…The alternating day and night rhythm, which takes 14 days, results in extreme surface temperatures of –244 °C [23] at the poles and +122 °C in the equatorial zone as well as maximum temperature changes of up to 280 K [9]. These extreme conditions make high demands on materials and processing due to thermal expansion.…”

Section: Lunar Environmentmentioning

confidence: 99%

Review of possible mineral materials and production techniques for a building material on the moon

Wilhelm

Curbach

2014

Structural Concrete

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This article provides an overview of the findings and production processes for the mineral materials that have been developed and tested worldwide in the past with regard to the establishment of a lunar base. Firstly, the aim of and procedure for constructing a lunar base are briefly outlined. Following that, the lunar environment factors and their influence on a possible structure are described. The paper then presents the advantages and disadvantages of the materials examined, such as sulphur concrete, cast basalt, lunar concrete or polymer concrete, on the one hand, as well as production processes investigated previously, such as sintering, geothermite reaction and 3D printing, on the other. One promising method is the dry‐mix/steam‐injection (DMSI) method for producing a lunar concrete as a possible material which was developed by T. D. Lin and is based on cement made from lunar resources.

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“…The internal pressure environment of the habitat set by NASA in conjunction with the lunar environment has specific design implications on the habitat (Jablonski, 2008). Due to the lack of atmosphere on the lunar surface and the internal pressure of the habitat, the predominant stress on the habitat while on the lunar surface is the internal pressure.…”

Section: Habitation Calculationsmentioning

confidence: 99%

In-situ strain analysis of potential habitat composites exposed to a simulated long-term lunar radiation exposure

Rojdev

O’Rourke

Hill

et al. 2013

Radiation Physics and Chemistry

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NASA is studying the effects of long-term space radiation on potential multifunctional composite materials for habitats to better determine their characteristics in the harsh space environment. Two composite materials were selected for the study and were placed in a test stand that simulated the stresses of a pressure vessel wall on the material. The samples in the test stand were exposed to radiation at either a fast dose rate or a slow dose rate, and their strain and temperature was recorded during the exposure. It was found that during a fast dose rate exposure the materials saw a decreased strain with time, or a shrinking of the materials. Given previous radiation studies of polymers, this is believed to be a result of crosslinking occurring in the matrix material. However, with a slow dose rate, the materials saw an increase in strain with time, or a stretching of the materials. This result is consistent with scission or degradation of the matrix occurring, possibly due to oxidative degradation.

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Technical Requirements for Lunar Structures

Cited by 36 publications

References 15 publications

Experimental and computational studies on the thermal behavior and fire retardant properties of composite metal foams

Experimental and computational studies on the thermal behavior and fire retardant properties of composite metal foams

Review of possible mineral materials and production techniques for a building material on the moon

In-situ strain analysis of potential habitat composites exposed to a simulated long-term lunar radiation exposure

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