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  • 1
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    Technology integration box beam failure study (1992)
    In:  Other Sources
    Details
    Publication Date: 2013-08-29
    Description: Composite structures have the potential to be cost effective, structurally efficient primary aircraft structures. As part of the Advanced Composite Technology (ACT) program to exploit this potential for heavily loaded aircraft structures, the design and fabrication of the technology integration box beam (TIBB) was completed. The TIBB is an advanced composite prototype structure for the center wing section of the Lockheed C-130 aircraft. The TIBB was tested for downbending, upbending, torsion, and combined upbending and torsion load conditions to verify the design. The TIBB failed at 83 percent of design ultimate load for the combined upbending and torsion load condition. Current analytical and experimental results are described for a study of the mechanisms that led to the failure of the TIBB. Experimental results include load, strain, and deflection data. An analytical study was conducted of the TIBB structural response. Analytical results include strain and deflection results from a global analysis of the TIBB.
    Keywords: COMPOSITE MATERIALS
    Type: Second NASA Advanced Composites Technology Conference; p 99-111
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Advanced composites technology program (1993)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: This paper provides a brief overview of the NASA Advanced Composites Technology (ACT) Program. Critical technology issues that must be addressed and solved to develop composite primary structures for transport aircraft are delineated. The program schedule and milestones are included. Work completed in the first 3 years of the program indicates the potential for achieving composite structures that weigh less and are cost effective relative to conventional aluminum structure. Selected technical accomplishments are noted. Readers who are seeking more in-depth technical information should study the other papers included in these proceedings.
    Keywords: COMPOSITE MATERIALS
    Type: Third NASA Advanced Composites Technology Conference, Volume 1, Part 1; p 49-78
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Overview of the ACT program (1992)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: NASA's Advanced Composites Program (ACT) was initiated in 1988. A National Research Announcement was issued to solicit innovative ideas that could significantly contribute to development and demonstration of an integrated technology data base and confidence level that permits cost-effective use of composite primary structures in transport aircraft. Fifteen contracts were awarded by the Spring of 1989 and the participants include commercial and military airframe manufacturers, materials developers and suppliers, universities, and government laboratories. The program approach is to develop materials, structural mechanics methodology, design concepts, and fabrication procedures that offer the potential to make composite structures cost-effective compared to aluminum structure. Goals for the ACT program included 30-50 percent weight reduction, 20-25 percent acquisition cost reduction, and provided the scientific basis for predicting materials and structures performance. This paper provides an overview of the ACT program status, plans, and selected technical accomplishments. Sixteen additional papers, which provide more detailed information on the research and development accomplishments, are contained in this publication.
    Keywords: COMPOSITE MATERIALS
    Type: FAA, Ninth DOD(NASA)FAA Conference on Fibrous Composites in Structural Design, Volume 2; p 577-59
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    NASA TECHNICAL REPORTS
  • 4
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    Cost-efficient manufacturing of composite structures (1991)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The Advanced Composites Technology (ACT) program is seeking research breakthroughs that will allow structures made of graphite epoxy materials to replace metals in the wings and fuselages of future aircrafts. NASA's goals are to reduce acquisition cost by 20 to 25 percent, structural weight for a resized aircraft by 40 to 50 percent, and the number of parts by half compared to current production aluminum aircraft. The innovative structural concepts, materials, and fabrication techniques emerging from the ACT program are described, and the relationship between aerospace developments and industrial, commercial, and sporting goods applications are discussed.
    Keywords: COMPOSITE MATERIALS
    Type: National Aeronautics and Space Administration, Technology 2000, Volume 1; p 221-230
    Format: application/pdf
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  • 5
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    NASA/USRA advanced design program activity 1990/1991 (1991)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Four problems were defined which had aspects which would be reasonably assigned to an interdisciplinary design team. The design problems are: (1) design of a thermal shield for a lunar telescope (thermal protection for a lunar telescope); (2) selenotextile shielding structure (a structure to protect a lunar habitat from intense solar radiation of tubes of woven polytetrafluoroethylene coated fiberglass fabric); (3) pneumatically assisted elbow joint design for the NASA Zero-prebreathe suit (will allow astronauts to make the transition from a high pressure internal environment to a lower pressure suit without spending time in an air lock); and (4) electrochemical system to power assist an astronaut's finger joints (assist in the movement of an astronaut's distal and proximal interphalangeal finger joints).
    Keywords: COMPOSITE MATERIALS
    Type: NASA-CR-189998 , NAS 1.26:189998
    Format: application/pdf
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  • 6
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    Third NASA Advanced Composites Technology Conference, volume 1, part 1 (1993)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: This document is a compilation of papers presented at the Third NASA Advanced Composites Technology (ACT) Conference. The ACT Program is a major multi-year research initiative to achieve a national goal of technology readiness before the end of the decade. Conference papers recorded results of research in the ACT Program in the specific areas of automated fiber placement, resin transfer molding, textile preforms, and stitching as these processes influence design, performance, and cost of composites in aircraft structures. Papers sponsored by the Department of Defense on the Design and Manufacturing of Low Cost Composites (DMLCC) are also included in Volume 2 of this document.
    Keywords: COMPOSITE MATERIALS
    Type: NASA-CP-3178-VOL-1-PT-1 , L-17167A-VOL-1-PT-1 , NAS 1.55:3178-VOL-1-PT-1 , Jun 08, 1992 - Jun 11, 1992; Long Beach, CA; United States
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  • 7
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    Third NASA Advanced Composites Technology Conference, volume 1, part 2 (1993)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: This document is a compilation of papers presented at the Third NASA Advanced Composites Technology (ACT) Conference held at Long Beach, California, 8-11 June 1992. The ACT Program is a major multi-year research initiative to achieve a national goal of technology readiness before the end of the decade. Conference papers recorded results of research in the ACT Program in the specific areas of automated fiber placement, resin transfer molding, textile preforms, and stitching as these processes influence design, performance, and cost of composites in aircraft structures. Papers sponsored by the Department of Defense on the Design and Manufacturing of Low Cost Composites (DMLCC) are also included in Volume 2 of this document.
    Keywords: COMPOSITE MATERIALS
    Type: NASA-CP-3178-VOL-1-PT-2 , L-17167B-VOL-1-PT-2 , NAS 1.55:3178-VOL-1-PT-2 , Jun 08, 1992 - Jun 11, 1992; Long Beach, CA; United States
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  • 8
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    The First NASA Advanced Composites Technology Conference, part 1 (1991)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Papers are presented from the conference. The ACT program is a multiyear research initiative to achieve a national goal of technology readiness before the end of the decade. Conference papers recorded results of research in the ACT program on new materials development and processing, innovative design concepts, analysis development and validation, cost effective manufacturing methodology, and cost tracking and prediction procedures. Papers presented on major applications programs approved by the Department of Defense are also included.
    Keywords: COMPOSITE MATERIALS
    Type: NASA-CP-3104-PT-1 , L-16889-PT-1 , NAS 1.55:3104-PT-1 , Oct 29, 1990 - Nov 01, 1990; Seattle, WA; United States
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  • 9
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    The influence of fiber waviness on the compressive behavior of unidirectional continuous fiber composites (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The influence of fiber waviness and matrix nonlinearity on the compressive behavior of continuous fiber composites is studied. A micromechanics model based on the kinematics of the fibers has been developed to predict the behavior of unidirectional composites with initially wavy fibers under compressive loads. The initial waviness has been idealized as sinusoidal. Nonlinear shear behavior of the matrix has been included. Because the shear strain in the matrix is a function of position, the deformed shape of the fibers differs from the initial shape. Therefore, the deformed fiber shape is represented by a sine series. Fiber waviness and matrix shear properties have been determined experimentally for T650-42/Radel C under several conditions. These experimental data have been used as input into the analytical model. Predicted compressive response is in reasonable agreement with experimental data.
    Keywords: COMPOSITE MATERIALS
    Type: Conference on Composite Materials: Testing and Design; Apr 24, 1990 - Apr 25, 1990; San Francisco, CA; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    First NASA Advanced Composites Technology Conference, Part 2 (1991)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Presented here is a compilation of papers presented at the first NASA Advanced Composites Technology (ACT) Conference held in Seattle, Washington, from 29 Oct. to 1 Nov. 1990. The ACT program is a major new multiyear research initiative to achieve a national goal of technology readiness before the end of the decade. Included are papers on materials development and processing, innovative design concepts, analysis development and validation, cost effective manufacturing methodology, and cost tracking and prediction procedures. Papers on major applications programs approved by the Department of Defense are also included.
    Keywords: COMPOSITE MATERIALS
    Type: NASA-CP-3104-PT-2 , L-16889-PT-2 , NAS 1.55:3104-PT-2 , Oct 29, 1990 - Nov 01, 1990; Seattle, WA; United States
    Format: application/pdf
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