Rasmus ÿstergaard forside 100%.indd - Solid Mechanics
Rasmus ÿstergaard forside 100%.indd - Solid Mechanics
Rasmus ÿstergaard forside 100%.indd - Solid Mechanics
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J =<br />
Γ<br />
∂ui<br />
Φdy − σijnj ds,<br />
∂x1<br />
<br />
Γ nj<br />
ɛ<br />
Φ Φ= 0 σijdɛij.<br />
<br />
<br />
uE n<br />
JR =<br />
0<br />
<br />
σnδun + Gtip,<br />
E <br />
E un un ≡ un(x1 = a0).<br />
<br />
JR, uE n ,<br />
∗ <br />
un <br />
<br />
Jss =Γ0 +Gtip, Γ0 = u∗ n<br />
0 σnduE n<br />
<br />
<br />
<br />
<br />
<br />
<br />
σ(un) = dJR(un)<br />
duE .<br />
n<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Gtip<br />
Γ0<br />
Gtip<br />
<br />
<br />
<br />
<br />
ˆσ tip utip,∗ <br />
n .
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