Some micromechanics considerations of the folding of rigidizable composite materials

Murphey, Thomas W.; Meink, Troy; Mikulas, Martin M.

doi:10.2514/6.2001-1418

Cited by 42 publications

(19 citation statements)

References 2 publications

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“…The twelve coupons were evenly split between two-ply and four-ply laminates. The laminates were reinforced with T300 carbon fibers, and the matrix material was DP-7 EMC resin, which is an epoxy based thermoset resin [3]. This resin had a glass transition temperature of approximately 70C.…”

Section: Testing and Resultsmentioning

confidence: 99%

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Incoherent Combining of High-Power Fiber Lasers for Directed-Energy Applications

Sprangle¹,

Ting²,

Peñano³

et al. 2008

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing date sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstandingny other provision of law, no person hatl be ait to any penalty for failing to comply with a collection of information if t does not display a currently valid OMB control number PLEASE DO NOT RETIM11 Y1=R FORM TO THE ABOVE ADDRESS.

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Section: Testing and Resultsmentioning

confidence: 99%

“…The critical wavelength, X,,, is a material property based on the fiber's failure strain. Equation 7 shows the relationship between the effective strain and the wavelength to amplitude ratio for a sinusoid if the axial strain is neglected [3]. …”

Section: Kinematic Analysis[4lmentioning

confidence: 99%

Incoherent Combining of High-Power Fiber Lasers for Directed-Energy Applications

Sprangle¹,

Ting²,

Peñano³

et al. 2008

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“…5 In particular, TEMBO ® EMC materials, which combine a fully-cured thermoset TEMBO ® shape memory polymer matrix with traditional fiber reinforcements, have the ability to "freeze" and release induced strain energy via a specific thermomechanical cycle. 6 Furthermore, TEMBO ® EMC materials can achieve significantly higher induced packaging strains than traditional hard-resin composites without damage to the fibers or the resin, 7 which leads to TEMBO ® EMC components that can be packaged more compactly than traditional designs. Finally, TEMBO ® EMC materials provide the added advantage of much lower stored strain energy than traditional high-strain, high-stiffness materials, thus significantly reducing parasitic mass associated with launch-containment devices.…”

Section: A Tfpv Cell Technologymentioning

confidence: 99%

“…6 Consultant, PO Box 4362. 7 Consultant, 8111 El Extenso Ct. F to provide a given total power. This limitation in TFPV technology means that TFPV systems will only be practical if more efficient deployment technologies and structural designs can be developed.…”

Section: Imentioning

confidence: 99%

Development of a Passively Deployed Roll-Out Solar Array

Barrett¹,

Campbell²,

Lake³

et al. 2006

4th International Energy Conversion Engineering Conference and Exhibit (IECEC)

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY) SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR'S ACRONYM(S)AFRL/VSSV Air Force Research Laboratory* Space Vehicles Directorate Advanced solar arrays capable of generating greater than 50 kW of total power, at power densities greater than 250 W/kg, are required for many future Air Force missions. The largest heritage systems are limited to less than 20 kW of total power, at roughly 80 W/kg. To meet the requirements of future Air Force missions, the Rollout And Passively Deployed ARray (RAPDAR™) has been developed. This innovative, patent-pending design takes full advantage of the latest advances in thin-film photovoltaic and TEMBO® Elastic Memory Composite (EMC) deployment technologies. A key feature of the design is the use of solar energy to passively actuate the TEMBO® EMC members and deploy the array. The present paper addresses the development and validation of detailed designs for the RAPDAR™ (patent applied for) structural system. Specific focus is placed on comparing the performance projections of RAPDAR™ with other thin-film array systems, and the development and validation of the EMC longerons, which are the primary structural members for the RAPDAR™ system controlling packaging and deployment, and providing primary stiffness and strength to the deployed system. The present paper addresses the development and validation of detailed designs for the RAPDAR™ (patent applied for) structural system. Specific focus is placed on comparing the performance projections of RAPDAR™ with other thin-film array systems, and the development and validation of the EMC longerons, which are the primary structural members for the RAPDAR™ system controlling packaging and deployment, and providing primary stiffness and strength to the deployed system. SUBJECT TERMS

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“…3 Furthermore, TEMBO ® EMC materials can achieve significantly higher induced packaging strains than traditional hard-resin composites without damage to the fibers or the resin, 4 which leads to TEMBO ® EMC components that can be packaged more compactly than traditional designs. TEMBO ® EMC materials also provide high strength and modulus, and low density, which leads to lightweight component designs.…”

Section: Tembo ® Elastic Memory Compositesmentioning

confidence: 99%

Development of a Novel, Passively Deployed Roll-Out Solar Array

Campbell

Barrett

Lake

et al.

2006 IEEE Aerospace Conference

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR'S ACRONYM(S) *Air Force Research LaboratorySpace Vehicles 3550 Aberdeen Ave SE SPONSOR/MONITOR'S REPORTKirtland AFB, NM 87117-5776 NUMBER(S) AFRL-VS-PS-TP-2006-1002 DISTRIBUTION / AVAILABILITY STATEMENTApproved for public release; distribution is unlimited. (VS06-0011) SUPPLEMENTARY NOTESSubmitted to IEEE Conference, Big Bend, MT, Feb 06 Government Purpose Rights 14. ABSTRACT Advanced solar arrays capable of generating greater than 50 kW of total power, at power densities greater than 250 W/kg, are required for many future Air Force missions. The largest heritage systems are limited to less than 15 kW of total power, at roughly 50 W/kg. The Roll Out and Passively Deployed Array (RAPDAR) design will demonstrate the feasibility of 50 kW, 250 W/kg-class solar array systems through an innovative design that takes full advantage of the latest advances in thin-film photovoltaic and TEMBO® Elastic Memory Composite (EMC) deployment technologies. The use of solar energy to passively deploy the array further improves the overall system efficiency. The present paper addresses the development and validation of detailed designs for the RAPDAR (patent applied for) structural system. Specific focus is placed on the development and validation of the EMC longerons, which are the primary structural members for the RAPDAR system controlling packaging and deployment, and providing primary stiffness and strength to the deployed system. The paper includes results from both analysis and testing of EMC longerons that demonstrate deployment and shape-storage capacity. Abstract -Advanced solar arrays capable of generating greater than 50 kW of total power, at power densities greater than 250 W/kg, are required for many future Air Force missions. The largest heritage systems are limited to less than 15 kW of total power, at roughly 50 W/kg. The Roll Out and Passively Deployed Array (RAPDAR) design will demonstrate the feasibility of 50 kW, 250 W/kg-class solar array systems through an innovative design that takes full advantage of the latest advances in thin-film photovoltaic and TEMBO SUBJECT TERMS

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Some micromechanics considerations of the folding of rigidizable composite materials

Abstract: There is considerable interest in the use of composites with a softened matrix to improve the compact packaging of structures for space applications.

Cited by 42 publications

References 2 publications

Incoherent Combining of High-Power Fiber Lasers for Directed-Energy Applications

Incoherent Combining of High-Power Fiber Lasers for Directed-Energy Applications

Development of a Passively Deployed Roll-Out Solar Array

Development of a Novel, Passively Deployed Roll-Out Solar Array

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