Rasmus ÿstergaard forside 100%.indd - Solid Mechanics
Rasmus ÿstergaard forside 100%.indd - Solid Mechanics Rasmus ÿstergaard forside 100%.indd - Solid Mechanics
Outward buckling of initially debonded face sheet x1 Inward bending of initially debonded face sheet x1 Interface shear fracture takes place away from the initial debond β α = 0.01 =0.01 α = 0.0 β =0.01 × © Γ=10 −6 EfH, u ∗ = H/10, λ1 =0.01 λ2 = λ1 +0.4, ℓ0/L α β • α =0.01 β =0.01 • α =0 β =0.01 ℓ0/L =0.075 gl gl P/P ΔL/L. P
P P gl 1 0.5 1. snap−back 2. snap−back Computation stopped 0 0 0.002 ΔL L 0.004 0.006 load bearing capacity for case (b) load bearing capacity for case (a) cr P , ×10
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- Page 10 and 11: Sandwich columns Composite Structur
- Page 12 and 13: γ
- Page 14 and 15: μi, Ei νi (i =1, 2)
- Page 16 and 17: K K = σCL iɛ+1
- Page 18 and 19: sij = ⎡ ⎢ ⎣ ν21 ν31 − −
- Page 20 and 21: ρ ρ
- Page 22 and 23: σn
- Page 24 and 25: utip,∗
- Page 26 and 27: σn ˆσ ˙λ
- Page 28 and 29: σ I n = un u∗ σ(λmax) n λmax
- Page 30 and 31: ˙δi
- Page 32 and 33: • •
- Page 34 and 35: M ∗ = Phχ+ M χ
- Page 36 and 37: z1 z2 M = 0 M =0. ψ
- Page 38 and 39: ω
- Page 40 and 41: σ12H/P =0.1, 0.05, 0.01
- Page 42 and 43: B, G = (s′ 11 )#2 2B2 2 2 P M +
- Page 44 and 45: P ΔPFB Initiation ψ = −45 ◦
- Page 46 and 47: Jc [J/m 2 ] Jc [J/m 2 ] 1000 800 60
- Page 48 and 49: 2
- Page 52 and 53: Pcr P gl 1 0.8 0.6 0.4 0.2 0.01 0.0
- Page 54 and 55: 0.6 0.5 0.4 0.3 0.2 0.1 initial cra
- Page 56 and 57: P P gl P P gl 1 0.8 0.6 0.4 0.2 1 5
- Page 58 and 59: ˆσ
- Page 60 and 61: JR σn σt U ∗ n JR
- Page 62 and 63: E
- Page 64 and 65: σn(Un/H)ℓ EfH = Pn EfH σt(Ut
- Page 66 and 67: (Ut ≡ 0)
- Page 68 and 69: Γ/HEf.
- Page 70 and 71: α
- Page 72 and 73: ϕ = −30 ◦ ◦ −60 , ϕ = −
- Page 74 and 75: β0,
- Page 76 and 77: β0,
- Page 78 and 79: ˆσi < ˆσcore ˆσi ˆσcore
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- Page 90 and 91: Int J Fract (2007) 143:301-316 DOI
- Page 92 and 93: Interface crack in sandwich specime
- Page 94 and 95: Interface crack in sandwich specime
- Page 96 and 97: Interface crack in sandwich specime
- Page 98 and 99: Interface crack in sandwich specime
P<br />
P gl<br />
1<br />
0.5<br />
1. snap−back<br />
2. snap−back<br />
Computation<br />
stopped<br />
0<br />
0 0.002<br />
ΔL<br />
L<br />
0.004 0.006<br />
load bearing<br />
capacity for<br />
case (b)<br />
load bearing<br />
capacity for<br />
case (a)<br />
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cr <br />
P ,<br />
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×10
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