Emergency explosion-proof material for blocking explosion shock waves
A technology of explosion-proof materials and explosion-proof walls, which is applied in the fields of application, blasting, and protective clothing. The effect of increasing the compressive strength and prolonging the action time
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Embodiment 1
[0044] as attached figure 1 As shown in (b), the reflective layer I is made of honeycomb 7055 alloy with a thickness of 7mm; the barrier layer II is made of aramid composite material, which is made of 80 layers of fiber cloth, and the laying angle is 0° / 90 °, the thickness of the barrier layer is 25mm; the energy-absorbing layer III is made of polyurethane foam with a porosity of 20% and a thickness of 50mm; the support layer IV is made of carbon fiber composite material, and the laying angle is 0° / 90°, and 70 layers of carbon fiber cloth are used It is made of laminated layers, and the thickness of the laminated board is 20mm. The mass fraction of the reflective layer in the explosion-proof material is 18.38%, that of the energy-absorbing layer is 12.30%, that of the barrier layer is 36.75%, and that of the supporting layer is 32.57%.
[0045]The composite process in the barrier layer II and support layer IV selects the vacuum-assisted forming process: the fiber cloth is cut...
Embodiment 2
[0050] as attached figure 1 As shown in (c), the reflective layer I is made of arched 7055 alloy with a thickness of 6mm; the barrier layer II is made of ultra-high molecular weight polyethylene composite material, and the surface density of ultra-high molecular weight polyethylene composite material is 80g / m 2 It is made of 150 layers of fiber cloth, the laying angle is [0° / 45° / -45° / 90°]s, and the thickness of the composite board is 30mm; the energy-absorbing layer Ⅲ chooses lightweight aluminum foam, and its pores The ratio is 25%, and the thickness is 45mm; the support layer IV is made of carbon fiber three-dimensional braided composite material, the braiding angle is 30°, and the thickness of the composite board is 15mm. The mass fraction of the reflective layer in the explosion-proof material is 18.17%, that of the energy-absorbing layer is 8.98%, that of the barrier layer is 44.67%, and that of the supporting layer is 28.18%.
[0051] The composite process of barrier la...
Embodiment 3
[0054] Embodiment 3 process optimization
[0055] (1) Barrier layer thickness optimization:
[0056] Referring to Example 2, the thickness of the barrier layer was replaced by 3 mm, 15 mm, 40 mm, and 55 mm, and other conditions remained unchanged, and an explosion-proof material was prepared. The compressive strength of the material was tested, and the results are shown in Table 1.
[0057] Table 1 The compressive strength of the barrier layer with different weight ratios
[0058]
[0059] It can be seen from the test data that if the thickness of the barrier layer is too large or too small, its anti-knock effect will be reduced, especially when the proportion of the barrier layer is small, its anti-knock performance will be worse. A large number of optimization experiments show that when the thickness of the barrier layer is 10-40mm, the anti-knock effect is better.
[0060] (2) Optimization of the thickness of the energy-absorbing layer:
[0061] Referring to Example 2...
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