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Mechanics and mechanisms of fracture of thermosetting epoxy polymers

  • A. J. Kinloch
Conference paper
Part of the Advances in Polymer Science book series (POLYMER, volume 72)

Abstract

Thermosetting epoxy polymers are widely employed in structural engineering applications and thus a knowledge of the mechanics and mechanisms of the fracture of such materials is of vital importance. The present Chapter discusses the fracture of epoxy polymers, concentrating on the use of a continuum fracture mechanics approach for elucidating the micromechanisms of crack growth and identifying pertinent failure criteria.

Keywords

Crack Opening Displacement Rubber Particle Shift Factor Glass Particle Epoxy Polymer 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

List of Symbols

a

crack length

aT

time-temperature shift factor

b

specimen thickness

bn

specimen thickness in plane of crack

c

critical distances ahead of crack

ey

yield strain

k

geometry constant

lm

length of moment arm

m

constant

r

distance (polar coordinate)

tf

time-to-failure

vf

volume fraction

w

specimen width

\(\dot y\)

rate of extension

C*

constant

E

Young's modulus

ΔE

activation energy

GIc

mode I fracture energy

GIcs

minimum value of GIc

KIc

mode I stress-intensity factor at the onset of crack growth

KIcs

“sharp crack” value of KIc

Pc

applied load at onset of crack growth

R

molar gas constant

T

temperature

Tg

glass-transition temperature

δtc

crack-opening displacement at crack growth

ν

Poisson's ratio

ϱ

crack tip at crack growth

σ

stress

σo

applied stress

σtc

critical stress at a crack tip

σyt

uniaxial tensile yield stress

BDMA

benzyldimethylamine

CTBN

carboxyl-terminated butadiene-acrylonitrile rubber

DETA

diethylenetriamine

DDM

diphenyldiaminomethane

DGEBA

diglycidyl ether of bisphenol A

DMP

tris(dimethylaminomethylphenol)

EDA

ethylenediamine

HDA

hexamethylenediamine

HAPA

hexahydrophthalic anhydride

MNA

methylnadic anhydride

MPD

m-phenylenediamine

PA

phthalic anhydride

PIP

piperidine

TEPA

tetraethylenepentamine

TETA

triethylenetetramine

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Copyright information

© Springer-Verlag 1985

Authors and Affiliations

  • A. J. Kinloch
    • 1
  1. 1.Department of Mechanical EngineeringImperial College of Science and TechnologyLondonU.K.

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