Residual Strength and Fatigue Lifetime of ... - Solid Mechanics
Residual Strength and Fatigue Lifetime of ... - Solid Mechanics
Residual Strength and Fatigue Lifetime of ... - Solid Mechanics
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H11<br />
bimaterial constant<br />
H22<br />
bimaterial constant<br />
h characteristic length<br />
hc<br />
core thickness<br />
hf<br />
face thickness<br />
K complex stress intensity factor<br />
KI<br />
mode I stress intensity factor<br />
KII<br />
mode II stress intensity factor<br />
k non-dimensional curve fitting parameter<br />
L length <strong>of</strong> the specimen<br />
M moment<br />
Njump<br />
number <strong>of</strong> jumped cycles<br />
Nref<br />
total number <strong>of</strong> cycles<br />
P load<br />
Pcr<br />
buckling load<br />
Pmax<br />
maximum fatigue load<br />
qy<br />
control parameter<br />
R computational efficiency ratio<br />
r radius<br />
Sij<br />
compliance matrix element<br />
S12<br />
discrete slope <strong>of</strong> the state variable increment between cycle one <strong>and</strong> two<br />
S23<br />
discrete slope <strong>of</strong> the state variable increment between cycle two <strong>and</strong> three<br />
Sjump<br />
estimated slope after a cycle jump<br />
T none-singular stress parallel to crack surface<br />
t time<br />
Ws<br />
required energy for creation <strong>of</strong> new surfaces<br />
x distance from crack tip<br />
y state variable<br />
yjump<br />
estimated state variable from the cycle jump analysis<br />
estimated state variable from the reference analysis<br />
yref<br />
Greek Symbols<br />
material mismatch parameter<br />
potential energy<br />
deflection<br />
ij<br />
Kronecker’s delta<br />
max<br />
maximum displacement<br />
x<br />
opening relative displacement <strong>of</strong> the crack flanks<br />
y<br />
sliding relative displacement <strong>of</strong> the crack flanks<br />
z<br />
out-<strong>of</strong>- plane relative displacement <strong>of</strong> the crack flanks<br />
tcyc<br />
time <strong>of</strong> each cycle<br />
tjump<br />
cycle jump time<br />
cycle jump time for state variable y<br />
ty,ump<br />
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