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Design And Analysis Of Inflatable Space Structures
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Book Synopsis Design and Analysis of Inflatable Space Structures by : Manpreet Singh Puri
Download or read book Design and Analysis of Inflatable Space Structures written by Manpreet Singh Puri and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The numerical algorithm is created in general context and is flexible for a large variety of material models. For a closed membrane structure, the skew symmetric constraint parameters vanish, while the existing symmetric domain variables mirror preservation of the system. This procedure does not demand the discretization of the fluid (gas) domain or the link between coupling of fluid (gas) and membrane. As a result of this basic fact, the computation is drastically simplified. The adaptive structures model introduces a novel approach in harnessing solar power for reuse on the ground as a stable source of power. The simulations were based on the space part of the stiff structure created of hexagonal membrane cells. Simulations are carried out in Abaqus Finite Element Analysis software for simplicity & a comparison for validation purposes is tested against an experimental inflatable cell within a vacuum chamber. It was showcased that the final configuration could be achieved regardless of the packaging shape of the inflatable cell array. The inflatable beam model is comprised of two sections, the bending & buckling of the inflated beam and the post-inflation of the bent and buckled beam. Abaqus software was used to simulate the inflatable beam during each configuration utilizing the integration of a modified VUMAT subroutine. A comparison is showcased representing the importance of the integration of the VUMAT subroutine within our Abaqus model.
Book Synopsis Structural Dynamics Experimental Activities in Ultra-lightweight and Inflatable Space Structures by : Richard S. Pappa
Download or read book Structural Dynamics Experimental Activities in Ultra-lightweight and Inflatable Space Structures written by Richard S. Pappa and published by . This book was released on 2001 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper reports recently completed structural dynamics experimental activities with new ultra-lightweight and inflatable space structures (a.k.a., "Gossamer" spacecraft) at NASA Langley Research Center, NASA Marshall Space Flight Center, and NASA Goddard Space Flight Center. Nine aspects of this work are covered: 1) inflated, rigidized tubes, 2) active control experiments, 3) photogrammetry, 4) laser vibrometry, 5) modal tests of inflatable structures, 6) in-vacuum modal tests, 7) tensioned membranes, 8) deployment tests, and 9) flight experiment support. Structural dynamics will play a major role in the design and eventually in-space deployment and performance of Grossamer spacecraft. Experimental research and development such as this is required to validate new analysis methods.
Book Synopsis Design of Inflatable Lunar Structure by : Dheeraj Kumar Kaja
Download or read book Design of Inflatable Lunar Structure written by Dheeraj Kumar Kaja and published by . This book was released on 2017 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: NASA and other space agencies are now looking to create a lunar settlement for the continued exploration of Moon and beyond. The most challenging aspect of a lunar settlement is its construction, and the weight and size of building materials brought from Earth. In-Situ Resource Utilization (ISRU) and inflatable structures are considered to be the most preferred way for the fabrication of a lunar settlement because they minimize weight and size. The use and performance of inflatables and flexible structures in space applications have been increased in the recent past due to the technological advancements in materials technology. So, we propose the concept of two-tier semi-rigid inflatable structure where the base is built with the help of autonomous robots using ISRU, and the main inflatable structure is manufactured on Earth and inflated on the lunar surface. Also, magnesium is proposed as the base material as it is the most abundantly available structural-strength material in lunar environment, and it is relatively easy to machine. A hemispherical inflatable structure placed on top of a cylindrical base with regolith shielding around the structure is considered as a possible lunar design as well as the test prototype. A static analysis is first conducted on the proposed design using ANSYS, and the stress values are order-of-magnitude verified with simple calculations that prove the possibility of the material and model. Also, an order-of-magnitude analysis is conducted on meteoroid impact loads where we estimate the maximum size of meteoroid that our structure can sustain. As future work, we suggest the framework known as Performance Based Engineering. We had spent some time attempting to use this framework for a simplified lunar structural analysis. However, large data gaps precluded significant progress. But we include it as one of our future research topics.
Book Synopsis Progress In Astronautics and Aeronautics by : C. H. Jenkins
Download or read book Progress In Astronautics and Aeronautics written by C. H. Jenkins and published by AIAA. This book was released on 2001 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of the Feasibility and Applicability of Shape Controlled Space Based Inflatable Membrane Structures by : Craig M. Whittinghill
Download or read book A Study of the Feasibility and Applicability of Shape Controlled Space Based Inflatable Membrane Structures written by Craig M. Whittinghill and published by . This book was released on 2000-09-01 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inflatable structures used for space applications offer mass, volume, and cost savings to spacecraft programs, allowing larger space structures to be built. For certain space applications, there are advantages to using large structures. For example, antennas achieve higher gains when they are increased in size. Higher gains equate to higher data throughputs. Therefore, inflatable structures offer improvements in performance to certain types of spacecraft components. Environmental factors induce surface errors on large inflatable structures, though. This degrades performance, especially for inflatable antennas. To reduce this degradation, active and passive control systems can be used to sense errors and control the shape of the antenna. One method of applying an active and passive control system is by using piezoelectric films that are either attached to or are part of the inflatable structure. The research performed for this thesis explored the theoretical performance of a large inflatable space-based antenna via spreadsheet analysis and the physical performance of a piezoelectric film via laboratory experimentation. For the laboratory experiment, the film was attached to a drum and varying internal pressures and voltages were applied. Also, in order to validate the experimental results, an analytical model was created using MSC/PATRAN and MSC/NASTRAN software.
Book Synopsis Deployment of Inflatable Space Structures by : M. Salama
Download or read book Deployment of Inflatable Space Structures written by M. Salama and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environmental Disturbance Modeling for Large Inflatable Space Structures by : Donald J. Davis
Download or read book Environmental Disturbance Modeling for Large Inflatable Space Structures written by Donald J. Davis and published by . This book was released on 2001-03-01 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tightening space budgets and stagnating spacelift capabilities are driving the Air Force and other space agencies to focus on inflatable technology as a reliable, inexpensive means of deploying large structures in orbit. Recent improvements in rigidization techniques make the use these inflatable structures feasible for a growing number of missions. For many of these missions, the primary design requirement is dimensional accuracy of the structure. Finite element analysis offers a means of predicting structural behavior in orbit. The analysis requires knowledge of external loads. This thesis examines the environmental disturbances which act upon large, orbiting structures. Calculations are made on a base model to relate the torques generated by these disturbances to the orbital altitude. This facilitates identification of the critical loads. An environmental disturbance model is then developed in MATLAB. The model calculates the critical loads on each element of a faceted structure as it propagates through its orbit. A basic structure is defined and run through the model. Results and analysis for various orbits are presented to verify accuracy of the code and validate the derived torque-altitude relationships.
Book Synopsis RIGEX: Preliminary Design of a Rigidized Inflatable Get-Away-Special Experiment by :
Download or read book RIGEX: Preliminary Design of a Rigidized Inflatable Get-Away-Special Experiment written by and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: As space structures grow in size and complexity, their weight and cost increase considerably. The use of inflatable and rigidizable structures offers drastic improvements in all areas of spacecraft design. The goal of this experiment is to verify and validate ground testing of inflation and rigidization methods for inflatable space structures. The Rigidized Inflatable Get-Away-Special Experiment is an autonomous, self-contained space shuttle experiment that will inflate and rigidize several structures. After inflation, the experiment will perform a structural analysis by exciting the rigidized structures and collecting vibration data. A systems engineering approach is utilized to make design decisions based on a total system and life-cycle perspective.
Download or read book Rigex written by John D. DiSebastian and published by . This book was released on 2001-03-01 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: As space structures grow in size and complexity, their weight and cost increase considerably. The use of inflatable and rigidizable structures offers drastic improvements in all areas of spacecraft design. The goal of this experiment is to verify and validate ground testing of inflation and rigidization methods for inflatable space structures. The Rigidized Inflatable Get-Away-Special Experiment is an autonomous, self-contained space shuttle experiment that will inflate and rigidize several structures. After inflation, the experiment will perform a structural analysis by exciting the rigidized structures and collecting vibration data. A systems engineering approach is utilized to make design decisions based on a total system and life-cycle perspective.
Author :C. H. Jenkins Publisher :AIAA (American Institute of Aeronautics & Astronautics) ISBN 13 : Total Pages :626 pages Book Rating :4.3/5 (91 download)
Book Synopsis Gossamer Spacecraft by : C. H. Jenkins
Download or read book Gossamer Spacecraft written by C. H. Jenkins and published by AIAA (American Institute of Aeronautics & Astronautics). This book was released on 2001 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of membrane and inflatable structures technology for space applications. It provides an overview and historical review of the subject; theoretical discussion of the mechanics and physics of membrane structures, and chemical and processing issues; and applications and case studies.
Book Synopsis Multidisciplinary Design Analysis and Optimization of Aerospace Composites by : Charles Lu
Download or read book Multidisciplinary Design Analysis and Optimization of Aerospace Composites written by Charles Lu and published by SAE International. This book was released on 2019-04-30 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multidisciplinary Design and Optimization of Aerospace Composite Materials is a collection of ten SAE technical papers focusing on the design analysis of aerospace composite structures from the perspective of various disciplines. The book concentrates on the following aspects: • Analytical methods for weight design of aircraft structures, including a parametric geometry model capable of generating dedicated models for both aerodynamic and structural solvers. • Methodologies for evaluating the structural performance of carbon/epoxy composite panels. • An aerodynamic design of flexible wings made of composite structures. • Thermal design and analysis of composite enclosures. • Methodologies for analyzing the acoustic performance of composite structures, including the design optimization method to evaluate the acoustic performance in terms of transmission loss (TL) of various composite panels. • The lightening effect on composites, presenting a theoretical method to compute the electrical current propagating through composite structures due to lightning strikes. • The issue of fire resistance as most polymer resins are flammable once the respective ignition temperatures are reached. • A probabilistic-based reliability analysis of the composite structures. The method is demonstrated on a graphite/epoxy composite space habitat subjected to the debris attacks. • A sustainability analysis of aircraft composite materials, including improved durability, less maintenance, and lower energy consumption.
Book Synopsis Technology for Large Space Systems by :
Download or read book Technology for Large Space Systems written by and published by . This book was released on 1986 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Large Space Structures & Systems in the Space Station Era by :
Download or read book Large Space Structures & Systems in the Space Station Era written by and published by . This book was released on 1990 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural Analysis of the Rigidizable Inflatable Get-Away-Special Experiment by :
Download or read book Structural Analysis of the Rigidizable Inflatable Get-Away-Special Experiment written by and published by . This book was released on 2004 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this research was to validate the structural integrity of the Rigidizable Inflatable Get-Away-Special Experiment (RIGEX) and make appropriate improvements to the design, motivated by static and dynamic analysis results. RIGEX is designed to advance the use of rigidizable inflatable structures in the space environment by providing three sets of on-orbit test data on the structural characteristics of three thermoplastic composite tubes. This thesis discusses the RIGEX structural analysis. The term structural analysis refers to the development of a detailed finite element model and the tests for which the model was used. The finite element model provided an acceptable estimation of RIGEX's natural frequencies, the structural integrity of the fastener system, the maximum stress seen by the aluminum primary structure, and the maximum possible displacements at various locations around the RIGEX structure for various load conditions. These three analyses motivated numerous design changes, which are discussed in detail in this thesis. The analysis process was repeated following each design change until all structural integrity and design criteria were met. In addition to the structural analysis and associated design changes, this thesis presents the as built RIGEX drawing package and wiring schematic. The results presented in this thesis are the first step towards passing the structural integrity requirements set forth by the National Aeronautics and Space Administration (NASA) for manned spaceflight. Recommendations of appropriate construction and testing techniques to ensure the actual structure matches the computer model are discussed.
Book Synopsis Analysis and Design of Inflatable Aerospace Structures by : John A. Main
Download or read book Analysis and Design of Inflatable Aerospace Structures written by John A. Main and published by . This book was released on 1993 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781794001909 Total Pages :26 pages Book Rating :4.0/5 (19 download)
Book Synopsis Demonstration of Probabilistic Sensitivity Analyses Tools on the Structural Response of a Representative Inflatable Space Structure by : National Aeronautics and Space Adm Nasa
Download or read book Demonstration of Probabilistic Sensitivity Analyses Tools on the Structural Response of a Representative Inflatable Space Structure written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2019-01-13 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work provides an initial step toward demonstrating a probabilistic numerical simulation capability to support trade studies and the development of a certification plan for inflatable space habitats. This study concentrates on interpreting the results from probabilistic analysis and numerical simulation tools to identify parameter sensitivities for a novel inflatable airlock concept, specifically the Non‐Axisymmetric Inflatable Pressure Structure (NAIPS) that was designed and tested under NASA's Minimalistic Advanced Softgoods Hatch (MASH) Program. A brief overview of the finite element model is provided along with the probabilistic sensitivity analysis approach. The sensitivity studies required a model that was numerically stable and efficient enough that hundreds of simulations could be completed in the allotted time. Therefore, the existing full model was simplified by: extracting a quarter symmetry section of the dome; focusing on a single inflation pressure; and replacing the non‐linear material stress‐strain curves with linear, isotropic materials defined by elastic moduli. Responses of interest include the sensitivity of various structural component loads to material properties, cord lengths, inflation pressure and friction. Multiple sensitivity studies were completed and three are reported here. The first study focused on utilizing wide input parameter ranges to provide an opportunity to assess numerical robustness. The next two studies narrowed the parameter ranges to enable focus on understanding uncertainty at a fixed operating condition. The completion of the sensitivity studies improved understanding of the interdependence of multiple inputs on the responses. In addition, numerical stability of the simulations over wide parameter ranges, shows the feasibility of incorporating uncertainty‐based methods in the design and certification of inflatable space habitats. With the experience and trust gained, it is anticipated that the
Book Synopsis Design and Ground-testing of an Inflatable-rigidizable Structure Experiment in Preparation for Space Flight by : Chad R. Moeller
Download or read book Design and Ground-testing of an Inflatable-rigidizable Structure Experiment in Preparation for Space Flight written by Chad R. Moeller and published by . This book was released on 2005 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
