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Friday, July 10, 2020 | History

2 edition of Mechanical behavior and fracture characteristics of off-axis fiber composites found in the catalog.

Mechanical behavior and fracture characteristics of off-axis fiber composites

Christos Chamis

Mechanical behavior and fracture characteristics of off-axis fiber composites

II - theory and comparisons

by Christos Chamis

  • 81 Want to read
  • 5 Currently reading

Published by National Aeronautics and Space Administration, Scientific and Technical Information Office, for sale by the National Technical Information Service in [Washington], Springfield, Va .
Written in English

    Subjects:
  • Fibrous composites -- Fractures.

  • Edition Notes

    StatementChristos C. Chambis and John H.Sinclair.
    SeriesNASA technical paper ; 1082, NASA technical paper -- 1082.
    ContributionsSinclair, John H., 1920-, United States. National Aeronautics and Space Administration. Scientific and Technical Information Office.
    The Physical Object
    Pagination27 p. :
    Number of Pages27
    ID Numbers
    Open LibraryOL17536290M

    Purchase Application of Fracture Mechanics to Composite Materials, Volume 6 - 1st Edition. Print Book & E-Book. ISBN , The mechanical behavior in the three-point bending of the laminar composite showed that the use of licuri fiber to obtain natural fiber-based plastic is completely viable. View full-text Discover more.

    Fig. Loss of stiffness or modulus as a function of exposure to ultraviolet radiation for glass fiber reinforced polypropylene composites [from Goel et al. ] 5 Polymer Matrix Composites Mechanical Behavior Fracture in PMCs, as in other composites, is associated with the characteristics of the three entities: fibers, matrix. Longbiao Li, Modeling stress-dependent matrix multiple fractures of fiber-reinforced ceramic-matrix composites considering fiberoxidation and fracture, Composite Interfaces, /, (), ().

    The measured mechanical behaviors, supplemented by post-fracture analysis of fiber pullout and fiber fracture mirrors, are compared in detail to the performance predicted theoretically. This allows for an assessment of the roles of the matrix, fiber strength, residual stresses, fiber geometry, and the fiber/matrix interfacial properties in. Mechanical behavior characteristics of hybrid composites with nonwoven carbon tissue (NWCT) are investigated under static tensile loadings. The hybrid composite consists of unidirectional CFRP and NWCT. The NWCT is composed of short fibers, discretely distributed with in-plane random orientation.


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Mechanical behavior and fracture characteristics of off-axis fiber composites by Christos Chamis Download PDF EPUB FB2

The mechanical behavior, fracture surfaces, and fracture modes of unidirectional high-modulus graphite-fiber/epoxy composites subjected to off-axis tensile loads were investigated experimentally.

The investigation included the generation of stress-strain-to-fracture data and scanning electron microscope studies of the fractured by: 5. OF OFF-AXIS FIBER COMPOSITES I - EXPERIMENTAL INVESTIGATION by John H. Sinclair and Christos C. Chamis Lewis Research Center SUMMARY An experimental investigation was conducted to study the mechanical behavior and fracture characteristics of high-modulus graphite-fiber/epoxy, unidirectional composite.

Mechanical behavior and fracture characteristics of off-axis fiber composites: II - theory and comparisons Author: C C Chamis ; John H Sinclair ; United States.

Mechanical behavior and fracture characteristics of off-axis fiber composites: I - Experiment investigation Author: John H Sinclair ; C C Chamis ; United States.

su RY A theoretical investigation was conducted to study the mechanical behavior and fracture characteristics of high-modulus grapite-fiber/epoxy unidirectional composites subjected to off-axis tensile load.

The results were compared with experimental data. The mechanical behavior and stresses inducing fracture modes of unidirectional high-modulus graphite-fiber/epoxy composites subjected to off-axis tensile loads were investigated theoretically. The investigation included the use of composite mechanics, combined-stress failure criteria, and finite-element stress analysis.

Mechanical behavior and fracture characteristics of off-axis fiber composites: II - theory and comparisons / By C. (Christos C.) Chamis, joint author. John H Sinclair and United States. National Aeronautics and Space Administration. Scientific and Technical Information Office.

Abstract. Issued Jan. Includes bibliographical references. It was found that off‐axis composites failed by three fracture modes, which produce unique fracture surface characteristics. The stress that dominates each fracture mode and the load angle range of its dominance can be identified.

[Show full abstract] comparing the predicted off-axis stress-strain curves with experimental data, it was found that the nonlinear behavior of the composite is highly dependent on the fiber. Fiber fractures develop as a function of increasing load or cycles in regions frequently associated with matrix cracks in the off-axis plies and preferentially near the specimen surfaces.

Delaminations between plies are also associated with this fiber failure mode. Shuqi Guo, Yutaka Kagawa, Tensile fracture behavior of continuous SiC fiber-reinforced SiC matrix composites at elevated temperatures and correlation to in situ constituent properties, Journal of the European Ceramic Society, /S(02), 22, 13, (), ().

Enhancement of the Mechanical Behavior of Starch-Palm Fiber Composites H. Megahed, M. Emara, Mahmoud Farag, Abdalla Wifi, ‎Mostafa El. Shazly Abstract. This study discusses the fabrication of starch- based hybrid ‎composite ‎reinforced with ‎chopped randomly oriented flax, sisal, and date palm fibers.

The tensile properties, before and after chemical treatment, as well as the. Mechanical Behavior and Fracture Characteristics of Off-axis Fiber Composites, NASA Technical PaperWashington DC. Google Scholar Szekrényes, A. and Uj, J. This paper explored the 3D progressive fracture process of a short carbon fiber reinforced polymer composite under uniaxial tensile loading via high-resolution in-situ micro X-ray computed tomography (μXCT).

Microstructural features extracted from the μXCT images were analyzed with the Halpin-Tsai model, laminate analogy approach, and shear-lag model to calculate the mechanical. The fracture surfaces of DCB, ENF and MMB specimens were not perfectly flat but exhibited some waviness, which is specific of textile FRPs (Fig.

The formation of an undulating fracture surface is a toughness enhancing mechanism as it promotes slip-stick fracture processes. Combinations of Composite Materials 10 Mechanical Behavior of Composite Materials 11 Basic Terminology of Laminated Fiber-Reinforced Composite Materials 15 Laminae 15 Laminates 17 Manufacture of Laminated Fiber-Reinforced Composite Materials Structure, Mechanical behavior and Pre-treatment of Natural fiber composites–A review Natural fiber based composite materials are being increasingly utilized in automobile industries due to their strength to weight ratio, cost and low density.

Sinclair, J. and Chamis, C. C.: Mechanical Behavior and Fracture Characteristics of Off-Axis Fiber Composites. I - Experimental Investigation.

NASA TP, Fiber metal laminate (FML) is a kind of lightweight material with excellent mechanical properties combining advantages of metal laminates and fiber reinforced composites. It has been widely used in the aerospace and transportation fields and is especially used as structural material such as aircraft skins, wings, and tails.

However, under complex service conditions, interlaminar failure in. The mechanical fracture and ductile-brittle transition (DBT) behavior, hysteresis phenomenon and the plastic zone size of polypropylene (PP) / ethylene-propylene-diene terpolymer (PP/EPDM) blends.

Tensile fracture behavior of ceramic matrix composites (CMCs) was investigated using characterization tools. First, a high-speed infrared camera was used to monitor the surface temperature of the CMC specimen during mechanical testing.

An infrared camera. The effects of strain rates on the mechanical behavior of continuous GFRT composites [19,20,21,22] have drawn attention from many scholars in the past years.

The strain rate-dependent tensile behavior of continuous GFRT composite under off-axis compression and tensile loading was studied. The experimental results showed that the mechanical. Introduction. Dental composite resin recently became the material of choice for most patients and dental practitioners.1 However, volumetric shrinkage and fracture are still considered as major concerns with dental composites.2,3 In order to overcome these weaknesses, attempts have been made toward increasing both their physical and mechanical properties.4 This necessitates the .