A simple estimate of laminated composite materials’...
Transcript of A simple estimate of laminated composite materials’...
-
2005 2
A simple estimate of laminated composite materials’ strength characteristics
∗
Nguyen Duy SINH
∗ ( : )
3
Key Words : composite materials, laminate, strength characteristics, layers debonding
1.FRP
(CFRP)(GFRP) CFRP GFRP
FRPFRP
2.
C̄ = CM {CM − (1 − f) (CM − CI) S}−1
× [CM − (CM − C I)] {S − f (S − I)}f CI CM
S
Eshelby
31)
3.
B1 B5 F1 F5 H1H5 2)
–1H1
4.
(1)–2
–3x
θ = 0◦
5%
(2)–
4 ((G2)4)
θ = 0◦ θ = 90◦
(3)–5
–6y
10%(4)
–7
(1)
-
y
x
z
–1 H1 (G1/G3/G2)S
q
xLΔ
xLΔ
x
x
L
qLEx =
–2
25
50
B4−DF1−DH2−A
0◦ (GPa)
B1−AB3−DH1−EB2−EB5−A
–3
5.0 10 150
5
10
15
θ = 0◦
θ = 15◦
θ = 30◦
θ = 45◦
θ = 60◦
θ = 75◦θ = 90◦
Eθ(GPa)
Eθ(GPa)
–4 4
P
ω
ω3
3
xxPLEI =
xL
–5
100
200
F1−EF3−DH5−D
y EI(GPa/m)
H1−AH2−AH3−AH5−A
–6
P15
3.3
10
ω
–7 3 (mm)
0.2 0.40
20
40 τmax(MPa)
ω(mm)
–8 F1
170
6
15P/2P/2
ω
–9 4 (mm)
10 200
100
200
300
400 (MPa)
ω(mm)
–10 F2
–8 F1
F1G2 G3F1 G2 G3
F1
(5)
–94 –10 F2
5.
5 10%
1)
3 ,
Vol. 51A, 2005.
2) FRP .:
(GF/CF)FRP ,
, 1984.
(2005 2 15 )
(2)