| Study of Free-Free Beam Structural Dynamics Perturbations due to Mounted Cable Harnesses |
APR 2007 |
14 pages |
| Authors:
James C. Goodding; Vit Babuska; D. T. Griffith; Brea R. Ingram; III Robertson Lawrence M.; CSA ENGINEERING INC ALBUQUERQUE NM
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 | Signal and power harnesses on spacecraft buses and payloads can alter structural dynamics, as has been noted in previous flight programs. The community, however, has never undertaken a thorough study to understand the impact of harness dynamics on spacecraft structures. The Air Force Research Laboratory is leading a test and analysis program to develop fundamental knowledge of how spacecraft harnesses impact dynamics and develop tools that structural designers could use ... |
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| Experimental and Numerical Identification of a Monolithic Articulated Concentrated Strain Elastic Structure's (MACSES's) Properties |
APR 2007 |
11 pages |
| Authors:
Eric L. Pollard; Thomas W. Murphey; Gregory E. Sanford; CSA ENGINEERING INC ALBUQUERQUE NM
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| The objective of this research is to identify the effective continuum properties of a recently developed, deployable hierarchical truss architecture composed of carbon fiber reinforced plastic (CFRP) tubes and CFRP tape-spring hinge elements with embedded shape memory alloy (SMA) flexures; this particular structural system is referred to as monolithic articulated concentrated strain elastic structure (MACSES) and is representative of a concentrated, material deformation based deployable architecture. The scope of this ... |
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| Synchronous Deployed Solar Sail Subsystem Design Concept |
APR 2007 |
14 pages |
| Authors:
Jeremy A. Banik; Thomas W. Murphey; CSA ENGINEERING INC ALBUQUERQUE NM
|
| A solar sail concept has been developed from a common spiral fold pattern in order to enable a simultaneous mast and sail deployment. This novel concept utilizes the stored strain energy in a series of elastic spar members to enforce proper folding kinematics rather than relying on bulky mechanical joints. The critical inner and outer spar networks are secured to four elastically extendible masts anchored to a central drum. Deployment ... |
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| Experimental and Numerical Analysis of a DECSMAR Structure's Deployment and Deployed Performance |
APR 2007 |
17 pages |
| Authors:
Eric L. Pollard; Thomas W. Murphey; Gregory E. Sanford; CSA ENGINEERING INC ALBUQUERQUE NM
|
| The objective of this research is to analyze the deployment and deployed performance of a recently developed, self-deployable truss architecture composed of carbon fiber reinforced plastic (CFRP) tape-spring elements and embedded shape memory alloy (SMA) flexures; this particular structural system is referred to as deployable elastic composite shape memory alloy reinforced (DECSMAR) and is representative of a concentrated, material deformation based deployable architecture. The scope of this study encompasses numerically ... |
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| Development of Deployable Elastic Composite Shape Memory Alloy Reinforced (DECSMAR) Structures |
MAY 2006 |
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| Authors:
Eric L. Pollard; Thomas W. Murphey; CSA ENGINEERING INC ALBUQUERQUE NM
|
 | The objective of this research is to develop a novel. self-deployable truss architecture composed of carbon fiber reinforced plastic (CFRP) tape-spring elements and embedded shape memory alloy (SMA) flexures; this particular structural system is referred to as deployable elastic composite shape memory alloy reinforced (DECSMAR) and is representative of a concentrated, material deformation based deployable architecture. The scope of this study encompasses applying fundamental principles of rational boom design relevant ... |
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| Development of Concentrated Strain Based Deployable Truss Structures |
2006 |
14 pages |
| Authors:
Eric L. Pollard; Thomas W. Murphey; Juan M. Mejia-Ariza; CSA ENGINEERING INC ALBUQUERQUE NM
|
| The objective of this research is to develop a novel deployable hierarchical truss architecture composed of extruded carbon fiber reinforced plastic (CFRP) rod and shape memory alloy (SMA) flexure elements; this structural system is representative of a concentrated material deformation based deployable architecture. The scope of this study encompasses applying fundamental principles of rational truss design, relevant to all deployable structures, first to prove the concept at the individual element ... |
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| Design and Evaluation of a Reinforced Advanced-Grid Stiffened Composite Structure |
2005 |
10 pages |
| Authors:
Adam Biskner; John Higgins; CSA ENGINEERING INC ALBUQUERQUE NM
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| A composite grid-stiffened structure concept was selected for the payload fairing of the Minotaur launch vehicle. Compared to previous designs, this concept is lighter weight and requires reduced manufacturing costs. Various failure mechanisms were examined for the composite grid-stiffened structure. The controlling criterion for this design was determined to be joint peel-off failure. The identification of this failure mechanism and the assessment of bounding strains to control it, required extensive ... |
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| EELV Secondary Payload Adapter (ESPA) Static Qualification Tests |
AUG 2004 |
26 pages |
| Authors:
Gregory E. Sanford; Jeffry S. Welsh; CSA ENGINEERING INC ALBUQUERQUE NM
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| The United States Air Force Research Lab is currently examining options to launch small satellites ( |
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| Structural Qualification of Unique Aerospace Structures |
2004 |
17 pages |
| Authors:
Gregory E. Sanford; Jeffry S. Welsh; CSA ENGINEERING INC ALBUQUERQUE NM
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| The Air Force Research laboratory, Space Vehicles Directorate (AFRL/ VS), and CSA Engineering have developed a large scale structural testing facility on Kirtland AFB, NM. This facility is capable of applying static and dynamic loads with up to 18 independent hydraulic actuators. Coupled with the servo-hydraulic load control unit is a fully integrated 256-channel data acquisition system (DAS). Configurable for strain gages, LVDT's, or virtually any other strain gage-based or ... |
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Reports by Corporate Author
