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Title: Numerical study of pyrolysis and combustion of a carbon fiber-epoxy composite.

Abstract

Abstract not provided.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1424571
Report Number(s):
SAND2017-2146C
651166
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the 10th US National Combustion Meeting held April 23-26, 2017 in College Park, MD.
Country of Publication:
United States
Language:
English

Citation Formats

Koo, Heeseok, Brown, Alexander, Koo, Heeseok, Brown, Alexander, Voskuilen, Tyler, and Pierce, Flint. Numerical study of pyrolysis and combustion of a carbon fiber-epoxy composite.. United States: N. p., 2017. Web.
Koo, Heeseok, Brown, Alexander, Koo, Heeseok, Brown, Alexander, Voskuilen, Tyler, & Pierce, Flint. Numerical study of pyrolysis and combustion of a carbon fiber-epoxy composite.. United States.
Koo, Heeseok, Brown, Alexander, Koo, Heeseok, Brown, Alexander, Voskuilen, Tyler, and Pierce, Flint. Wed . "Numerical study of pyrolysis and combustion of a carbon fiber-epoxy composite.". United States. doi:. https://www.osti.gov/servlets/purl/1424571.
@article{osti_1424571,
title = {Numerical study of pyrolysis and combustion of a carbon fiber-epoxy composite.},
author = {Koo, Heeseok and Brown, Alexander and Koo, Heeseok and Brown, Alexander and Voskuilen, Tyler and Pierce, Flint},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 2017},
month = {Wed Feb 01 00:00:00 EST 2017}
}

Conference:
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  • Abstract not provided.
  • An extensive characterization suite has been performed on the response and failure of a ductile epoxy 55A and uniaxial carbon fiber reinforced epoxy composite of IM7 fibers in 55A resin from the quasistatic to shock regime. The quasistatic and intermediate strain rate response, including elastic modulus, yield and failure have are characterized by quasistatic, SHPB, and DMA measurements as a function of fiber orientation and temperature. The high strain rate shock effect of fiber orientation in the composite and response of the pure resin are presented for plate impact experiments. It has previously been shown that at lower impact velocitiesmore » the shock velocity is strongly dependent on fiber orientation but at higher impact velocity the in-plane and through thickness Hugoniots converge. The current results are compared with previous studies of the shock response of carbon fiber composites with more conventional brittle epoxy matrices. The spall response of the composite is measured and compared with quasistatic fracture toughness measurements.« less
  • A variety of engineering and experimental applications require primary support structures which are self-centering. High mechanical strength, low-density, carbon fiber/epoxy matrix composite springs are used in unique planar, cylindrical, conical, and spherical configurations to self-center components. The sinusoidal and triangular-shaped composite springs are readily manufactured and assembled into component hardware. Design considerations, flexural strength properties, load bearing and centering data plus procedures for the manufacture of composite springs are presented.
  • In this paper, the effects of fiber orientation in stacking sequence on stress concentration for plates with different opening notches and shapes are considered for carbon fiber/epoxy composite material laminates. Two mathematical models are formulated to maximize the stress concentration subject to some constraints. One mathematical model is developed by using Savin`s closed form solution and the other is developed by using the finite element solution methodology. The complex search (Box algorithm) optimization technique is employed to determine the optimal value of highest stress concentration around the opened notches of different laminated composite materials. Results obtained from the optimization techniquesmore » are also compared with some experimental results for carbon fiber/epoxy (type IM7) composite materials at some levels of aspect ratios and fiber orientations for the special case of circular notches and center cracks.« less
  • A creep model presented in part 1 of this series is used to simulate the creep rupture of unidirectional composite [AS4/3501-6 [90]{sub 16}] and is compared with the experimental results in this final part of the series. A constant critical energy is proposed as the fracture criterion. Using the theory, the time dependent increase in stored elastic energy with time is calculated. Fracture occurs when this energy equals the critical energy for fracture. This critical energy for fracture has been measured by constant strain rate testing of composite at temperatures above T{sub g}, when the matrix is in the rubberymore » state and this leads to prediction of a stress level below which time dependent fracture will never occur. Limitations of this fracture criterion at high stress levels or short fracture time are analyzed. Fractographic analysis of the matrix and composite, fractured by constant strain rate tests at various temperatures, are presented in support of this fracture criterion.« less