Blast-protection element
View Patent ↗A blast-protection element for protecting a vehicle against a blast is disclosed. It includes a deformable impact section which has a blast facing surface, at least one apex part and at least two blast-guiding parts. The blast-guiding parts extend at opposed sides of the apex part, and the apex part further includes a protruding apex in the blast facing surface. The blast-guiding parts each include a concave portion of the blast-facing surface and the blast guiding parts in total span at least 75% of the width of the impact section and more than 90% of the blast-facing surface of each of the blast-guiding parts is concave.
1. A blast-protection element for protecting a vehicle against a blast, said blast-protection element comprising:
a deformable impact section, wherein said impact section comprises a blast-facing surface, at least one apex part and at least two blast-guiding parts, wherein said blast-guiding parts extend at opposed sides of said apex part and terminate at opposing ends,
wherein a) said apex part comprises a protruding apex in said blast-facing surface
wherein b) said at least two blast-guiding parts each comprise a concave portion of said blast-facing surface,
wherein c) the blast guiding parts in total span at least 75% of the width of the impact section,
wherein d) more than 90% of the blast-facing surface of each of said blast-guiding parts is concave,
wherein e) said blast-facing surface of said impact section defines a transversal cross-sectional profile comprising said apex between two profile sections corresponding to two of said blast-guiding parts,
wherein f) said two concave profile sections define an angle outwardly around said apex of more than 180°,
wherein g) said apex is positioned in a center part of said transversal cross-sectional profile, and
wherein h) the opposing ends of the concave blast-guiding parts and the apex define a triangle, said triangle having an included angle at the apex of 60° to less than 180°.
2. A blast-protection element according to claim 1 , wherein each of the blast guiding parts can, at least partially, deform as a concave membrane under external blast loading.
3. A blast-protection element according to claim 1 , wherein said transversal cross-sectional profile is concave over more than half of the arc length of said transversal cross-sectional profile.
4. A blast-protection element according to claim 1 , wherein said blast-facing surface of said impact section defines a transversal cross-sectional profile having the general form of an inwardly curved V-shape.
5. A blast-protection element according to claim 1 , wherein the blast-facing surface of the impact section has, in a region adjacent to an apex wherein the vertical distance between the blast-facing surface and the apex is less than 25% of the height of the impact section, an angle of incidence with a blast wave propagating in vertical direction of 45° or more.
6. A blast-protection element according to claim 1 , wherein the blast-facing surface of the impact section has, in a region adjacent to an apex wherein the vertical distance between the blast-facing surface and the apex is less than 25% of the height of the impact section, an angle of incidence with a blast wave propagating in vertical direction of 60° or more.
7. A blast-protection element according to claim 1 , wherein the height of the impact section, is more than 30% of the width of the impact section.
8. A blast-protection element according to claim 1 , comprising means for attaching the blast-protection element to a vehicle.
9. A blast-protection element according to claim 1 , wherein said impact section comprises an interior side opposite said blast-facing surface and wherein said blast-protection element comprises one or more reinforcing ribs extending at the interior side of the impact section.
10. A blast-protection element according to claim 9 , wherein said impact section is at least partly formed from a fibre-reinforced composite.
11. A blast-protection element according to claim 9 , wherein said impact section is at least partly formed from a fibre metal laminate comprising a laminate of several thin metal layers bonded with layers of fibre-reinforced composite material.
12. A blast-protection element according to claim 1 , wherein said apex points in a blast-facing direction.
13. A blast-protection element according to claim 1 , wherein the impact section is formed from a composite material.
14. A blast-protection element according to claim 1 , wherein the impact section is formed from a material comprising a metal or alloy.
15. A blast-protection element according to claim 1 , wherein the impact section is formed from a fibre metal laminate comprising a laminate of several thin metal layers bonded with layers of fibre-reinforced composite material.
16. A land vehicle comprising a blast-protection element according to claim 1 .
17. A method of manufacturing a land vehicle, comprising attaching a blast-protection element according to claim 1 to a vehicle.