Download or read book Development and Evaluation of Stitched Sandwich Panels written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-15 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study explored the feasibility and potential benefits provided by the addition of through-the-thickness reinforcement to sandwich structures. Through-the-thickness stitching is proposed to increase the interlaminar strength and damage tolerance of composite sandwich structures. A low-cost, out-of-autoclave processing method was developed to produce composite sandwich panels with carbon fiber face sheets, a closed-cell foam core, and through-the-thickness Kevlar stitching. The sandwich panels were stitched in a dry preform state, vacuum bagged, and infiltrated using Vacuum Assisted Resin Transfer Molding (VARTM) processing. For comparison purposes, unstitched sandwich panels were produced using the same materials and manufacturing methodology. Test panels were produced initially at the University of Utah and later at NASA Langley Research Center. Four types of mechanical tests were performed: flexural testing, flatwise tensile testing, core shear testing, and edgewise compression testing. Drop-weight impact testing followed by specimen sectioning was performed to characterize the damage resistance of stitched sandwich panels. Compression after impact (CAI) testing was performed to evaluate the damage tolerance of the sandwich panels. Results show significant increases in the flexural stiffness and strength, out-of-plane tensile strength, core shear strength, edgewise compression strength, and compression-after-impact strength of stitched sandwich structures. Stanley, Larry E. and Adams, Daniel O. and Reeder, James R. (Technical Monitor) Langley Research Center NASA Order L-11332; RTOP 242-82-76-10
Download or read book Development and Evaluation of Stitched Sandwich Panels written by Larry E. Stanley and published by . This book was released on 2001 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of the mechanical performance of pin reinforced sandwich structures written by Mohamed Adli Dimassi and published by Logos Verlag Berlin GmbH. This book was released on 2019-11-15 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rising demand to reduce fuel consumption and the continuous increase of materials and manufacturing costs has obliged aircraft manufacturers to boost the use of composite materials and to optimise the manufacturing methods. Foam core sandwich structures combine the advantages of high bending properties with low manufacturing costs when liquid composite processes are used. However, the use of foam core sandwich structures is not widespread in aircraft applications due to the better weight-specific performance of honeycomb cores and the susceptibility to impact loading. In this context, pin reinforcements are added to the foam core to improve its mechanical properties and its damage tolerance. This work contributes to the understanding of the mechanical behaviour of pin-reinforced foam core sandwich structures under static and impact loading. Ultrasonic scan and micro-computed tomography are used to identify the different damage modes. The effect of very low temperature on the damage behaviour under impact loading is investigated. An explicit simulation model to predict the impact response of pin-reinforced foam core sandwich structures is also proposed.
Download or read book Sandwich Structures 7 Advancing with Sandwich Structures and Materials written by O.T. Thomsen and published by Springer Science & Business Media. This book was released on 2005-08-16 with total page 1064 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sandwich structures represent a special form of a laminated composite material or structural elements, where a relatively thick, lightweight and compliant core material separates thin stiff and strong face sheets. The faces are usually made of laminated polymeric based composite materials, and typically, the core can be a honeycomb type material, a polymeric foam or balsa wood. The faces and the core are joined by adhesive bonding, which ensures the load transfer between the sandwich constituent parts. The result is a special laminate with very high bending stiffness and strength to weight ratios. Sandwich structures are being used successfully for a variety of applications such as spacecraft, aircraft, train and car structures, wind turbine blades, boat/ship superstructures, boat/ship hulls and many others. The overall objective of the 7th International Conference on Sandwich Structures (ICSS-7) is to provide a forum for the presentation and discussion of the latest research and technology on all aspects of sandwich structures and materials, spanning the entire spectrum of research to applications in all the fields listed above.
Download or read book Solutions for Maintenance Repair and Overhaul written by T. Hikmet Karakoc and published by Springer Nature. This book was released on 2023-12-10 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Symposium on Aircraft Technology, MRO, and Operations (ISATECH) is a multi-disciplinary symposium that presents research on current issues in the field of aerospace. The conference provides a platform offering insights on the latest trends in aircraft technology, maintenance, repair, overhaul, and operations that offer innovative solutions to the challenges facing the aviation industry. ISATECH allows researchers, scientists, engineers, practitioners, policymakers, and students to exchange information, present new technologies and developments, and discuss future direction, strategies and priorities.
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1995 with total page 1484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the ASME Applied Mechanics Division written by and published by . This book was released on 2005 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bridging the Centuries with SAMPE s Materials and Processes Technology written by Steve Loud and published by Taylor & Francis. This book was released on 2000 with total page 2381 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Langley Scientific and Technical Information Output 2001 written by and published by . This book was released on 2002 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Departments of Veterans Affairs and Housing and Urban Development and Independent Agencies Appropriations for 1993 written by United States. Congress. House. Committee on Appropriations. Subcommittee on VA, HUD, and Independent Agencies and published by . This book was released on 1992 with total page 1068 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Assessment of the State of the art in the Design and Manufacturing of Large Composite Structures for Aerospace Vehicles written by Charles E. Harris and published by . This book was released on 2001 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of an assessment of the state-of-the-art in the design and manufacturing of large composite structures are described. The focus of the assessment is on the use of polymeric matrix composite materials for large airframe structural components, such as those in commercial and military aircraft and space transportation vehicles. Applications of composite materials for large commercial transport aircraft, general aviation aircraft, rotorcraft, military aircraft, and unmanned rocket launch vehicles are reviewed. The results of the assessment of the state-of-the-art include a summary of lessons learned, examples of current practice, and an assessment of advanced technologies under development.
Download or read book Proceedings of the Tenth U S Japan Conference on Composite Materials written by Fu-Kuo Chang and published by DEStech Publications, Inc. This book was released on 2002 with total page 1136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presentations by advanced materials specialists from around the world. Of special interest in this volume are the presentations on application areas such as automotive and civil engineering, nanomaterials, ceramic/metal composites, smart materials, and composite structures.
Download or read book Green Aviation written by Ramesh Agarwal and published by John Wiley & Sons. This book was released on 2016-10-17 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Green Aviation is the first authoritative overview of both engineering and operational measures to mitigate the environmental impact of aviation. It addresses the current status of measures to reduce the environmental impact of air travel. The chapters cover such items as: Engineering and technology-related subjects (aerodynamics, engines, fuels, structures, etc.), Operations (air traffic management and infrastructure) Policy and regulatory aspects regarding atmospheric and noise pollution. With contributions from leading experts, this volume is intended to be a valuable addition, and useful resource, for aerospace manufacturers and suppliers, governmental and industrial aerospace research establishments, airline and aviation industries, university engineering and science departments, and industry analysts, consultants, and researchers.
Download or read book Departments of Veterans Affairs and Housing and Urban Development and Independent Agencies Appropriations for 1992 written by United States. Congress. House. Committee on Appropriations. Subcommittee on VA, HUD, and Independent Agencies and published by . This book was released on 1991 with total page 1116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Materials Division Research and Technical Accomplishments for FY 1988 and Plans for FY 1989 written by and published by . This book was released on 1989 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Departments of Veterans Affairs and Housing and Urban Development and Independent Agencies Appropriations for 2000 written by United States. Congress. House. Committee on Appropriations. Subcommittee on VA, HUD, and Independent Agencies and published by . This book was released on 1999 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt:
