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Author: Donald W. Oplinger Publisher: ISBN: Category : Shear (Mechanics) Languages : en Pages : 26
Book Description
This report covers stress analysis and experimental studies of four types of tension specimens designed for testing composite materials. Two ASTM specimen types (D3039 tab-ended and D638 dogbone) are considered, along with the bowtie (flat bar with linear taper) design developed by Grumman and a streamline design developed at AMMRC. Stress analyses of the first three types show them to be subjected to high shear stresses and tensile stress concentrations which tend to degrade their performance. Experimental studies generally tended to confirm that failures initiated where the stress peaks were predicted, and suggest that elimination of such peaks would lead to a better-performing tension specimen. Stress analysis of the AMMRC streamline design showed how shear stress levels and indicated that the design is free of tensile stress concentrations. Results of efforts aimed at experimental evaluation of the streamline specimen indicate that it has much promise as an improved design for tension testing, both under monotonic and cyclic loading. (Author).
Author: Donald W. Oplinger Publisher: ISBN: Category : Shear (Mechanics) Languages : en Pages : 26
Book Description
This report covers stress analysis and experimental studies of four types of tension specimens designed for testing composite materials. Two ASTM specimen types (D3039 tab-ended and D638 dogbone) are considered, along with the bowtie (flat bar with linear taper) design developed by Grumman and a streamline design developed at AMMRC. Stress analyses of the first three types show them to be subjected to high shear stresses and tensile stress concentrations which tend to degrade their performance. Experimental studies generally tended to confirm that failures initiated where the stress peaks were predicted, and suggest that elimination of such peaks would lead to a better-performing tension specimen. Stress analysis of the AMMRC streamline design showed how shear stress levels and indicated that the design is free of tensile stress concentrations. Results of efforts aimed at experimental evaluation of the streamline specimen indicate that it has much promise as an improved design for tension testing, both under monotonic and cyclic loading. (Author).
Author: G. Foley Publisher: ISBN: Category : Composite materials Languages : en Pages : 24
Book Description
Tensile and shear stress concentrations have been found in prior work to degrade the performance of tension test specimen designs in current use. In the particular case of tabbed specimens there is need for an alternative specimen design to avoid problems with tab failures and loss of tabs when testing in adverse environments. The streamline shape which is described here provides such an alternative. This paper discusses the theoretical background to the streamline shape, together with results of studies in which its performance is compared experimentally with other specimen types, especially tabbed specimens, in both static and fatigue testing environments.
Author: Charles E. Bakis Publisher: ASTM International ISBN: 0803134657 Category : Composite materials Languages : en Pages : 394
Book Description
"The 14th ASTM Symposium on Composite Materials: Testing and Design, was held March 11-12, 2002 in Pittsburgh, PA. The Testing and Design symposia, sponsored by Committee D30 on Composite Materials, have been scheduled on a roughly bi-yearly basis since 1969 to provide a forum for researchers and practitioners to meet and exchange their latest methods and findings related to the testing and design of composite materials and structures."
Author: Mohammad Jawaid Publisher: Woodhead Publishing ISBN: 0081023006 Category : Technology & Engineering Languages : en Pages : 480
Book Description
Mechanical and Physical Testing of Biocomposites, Fibre-Reinforced Composites and Hybrid Composites covers key aspects of fracture and failure in natural/synthetic fiber reinforced polymer based composite materials, ranging from crack propagation, to crack growth, and from notch-size effect, to damage-tolerant design. Topics of interest include mechanical properties, such as tensile, flexural, compression, shear, impact, fracture toughness, low and high velocity impact, and anti-ballistic properties of natural fiber, synthetic fibers and hybrid composites materials. It also covers physical properties, such as density, water absorption, thickness swelling, and void content of composite materials fabricated from natural or synthetic materials. Written by leading experts in the field, and covering composite materials developed from different natural fibers and their hybridization with synthetic fibers, the book's chapters provide cutting-edge, up-to-date research on the characterization, analysis and modelling of composite materials. - Contains contributions from leading experts in the field - Discusses recent progress on failure analysis, SHM, durability, life prediction and the modelling of damage in natural fiber-based composite materials - Covers experimental, analytical and numerical analysis - Provides detailed and comprehensive information on mechanical properties, testing methods and modelling techniques
Author: P.K. Mallick Publisher: CRC Press ISBN: 9780824793043 Category : Technology & Engineering Languages : en Pages : 1270
Book Description
Offers information on the fundamental principles, processes, methods and procedures related to fibre-reinforced composites. The book presents a comparative view, and provides design properties of polymeric, metal, ceramic and cement matrix composites. It also gives current test methods, joining techniques and design methodologies.
Author: Leif A. Carlsson Publisher: CRC Press ISBN: 142003202X Category : Technology & Engineering Languages : en Pages : 259
Book Description
Over much of the last three decades, the evolution of techniques for characterizing composite materials has struggled to keep up with the advances of composite materials themselves and their broadening areas of application. In recent years, however, much work has been done to consolidate test methods and better understand those being used. Finally,
Author: Leif A. Carlsson Publisher: CRC Press ISBN: 1439848580 Category : Technology & Engineering Languages : en Pages : 382
Book Description
Over the last three decades, the evolution of techniques for the experimental testing of composite materials has struggled to keep up with the advances and broadening areas of application of the composite materials themselves. In recent years, however, much work has been done to consolidate and better understand the test methods being used. Finally, a consensus regarding the best available methods exists, and definitive recommendations can be made. Experimental Characterization of Advanced Composite Materials provides a succinct, authoritative treatment of the best available methods for determining the mechanical properties, thermal expansion coefficients, and fracture and strength data for composite materials. With an emphasis firmly on practical matters, it presents processing techniques, specimen preparation, analyses of test methods, test procedures, and data reduction schemes. Five chapters covering specific aspects of lamina testing are followed by discussions extending those principles to laminate responses. The treatment concludes by exploring composite durability issues with a detailed examination of defects and fracture mechanics. The Fourth Edition is revised to include: New figures, updated ASTM standards, and an expanded index Major additions in processing of thermoset resins, neat resin tests, sandwich structures, cure analyses, damage tolerance tests, single fiber tests, fiber matrix interface tests, interlaminar tension tests, through-thickness tension and compression tests, open-hole compression tests, falling weight impact tests, compression-after-impact tests, sandwich beam and core tests, and more With its concise format, detailed procedures, and expert assessments, this book is an outstanding resource for composites manufacturing and test engineers, lab technicians, and other industry professionals, as well as students, academia, and government research and engineering organizations. It brings together all of the most appropriate and widely accepted test methods developed to date.
Author: Donald W. Oplinger
Author: Donald W. Oplinger
Author: S. Chaterjee
Author: G. Foley
Author: Richard Chait
Author: Charles E. Bakis
Author: Joseph R. Davis
Author: Mohammad Jawaid
Author: P.K. Mallick
Author: Leif A. Carlsson
Author: Leif A. Carlsson