Untitled

120 Y.W. Wong and S. Pellegrino
w
(mm)
1
0.5
0
-0.5
Fig. 6. Comparison of experimental measurements with ABAQUS results for
T1 T /T2 T = 4 and for cross sections at distance of (a) 105 mm, (b) 177 mm, (c) 346 mm
from corner.
Table 2. Wrinkle half-wavelengths and amplitudes for T1 T /T2 T =4atr = 346 (all
values in mm)
λ A
t Eq. 23 Experiment FE Eqs 24, 25 Eq. 24+FE 1 Experiment FE 2
0.025 24.6 23.8 22.3 3.5 2.8 1.9 2.0
0.050 41.3 33.9 35.6 3.2 2.1 1.8 1.6
6 Discussion and Conclusions
The wrinkling of square membranes subject to coplanar pairs of equal and
opposite corner forces has been investigated. It has been shown that two
wrinkling regimes exist. The first regime occurs for symmetric loading and
asymmetric loadinguptoapproximately T1 T /T2 T =2.41, and it is characterised
1 Membrane model with IMP.
2 Shell model.
3
2
1
0
-1
Experiment
ABAQUS
0 50 100 150 200
w
(mm)
0
(a) (b)
-1
0 200 400 600
2
1
Distance, η (mm)
(c)
100 200 300 400
Distance, η (mm) Distance, η (mm)
w
(mm)
Experiment
ABAQUS
Experiment
ABAQUS