6
Advances in Materials Science and Engineering
4.682e + 005 4.294e + 005 3.905e + 005 3.517e + 005 3.129e + 005 2.741e + 005 2.353e + 005 1.965e + 005 1.577e + 005 1.188e + 005 8.003e + 004 4.122e + 004 2.405e + 003 1.605e − 003 1.474e − 003 1.343e − 003 1.211e − 003 1.080e − 003 9.489e − 004 8.176e − 004 6.864e − 004 5.551e − 004 4.239e − 004 2.926e − 004 1.614e − 004 3.015e − 005
(a) Stress contours
(b) Displacement contours Figure 14: The stress and displacement contours of model with flute height 𝐻 of 5 mm in drop test.
2.0
1.20
1.8
1.00
1.6
8.00
1.4
1.2
6.00
1.0
4.00
0.8
0.6
2.00
2
3
4
5
Flute height (mm)
0.00 0.97 100.77 200.58 300.38 400.18 499.79 599.79 Time ( 𝜇 s) A B Figure 15: Time-dependent stress of A, B point in drop test (model with flute height 𝐻 of 5mm). stress of A, B point in the drop test was obtained and shown in Figure 15 (model with flute height 𝐻 of 5 mm). From above simulation, the maximum stresses of A, B point in the models with different flute height 𝐻 in the drop test were obtained and the results are shown in Figure 16.
A B Figure 16: Maximum stress of A, B point in the models with different flute height 𝐻 in the drop test.
From Figure 16, we can see that, with the increase of flute height 𝐻 , the maximum stress of goods on the upper board in the drop test decreased. Therefore, with the increase of flute height 𝐻 , the cushioning properties of corrugated board increased. This conclusion is consistent with the conclusions of Section 3.2.
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