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An armor structure for a vehicle underbody. The armor structure includes an inner plate that is mounted proximate to the vehicle underbody, the inner plate having a plurality of first openings; and an outer plate that is mounted distal to the vehicle underbody, the outer plate having a plurality of

An armor structure for a vehicle underbody. The armor structure includes an inner plate that is mounted proximate to the vehicle underbody, the inner plate having a plurality of first openings; and an outer plate that is mounted distal to the vehicle underbody, the outer plate having a plurality of second openings. The inner plate and the outer plate are substantially parallel and separated by a spacing. The inner plate and the outer plate each have substantially equal V bends at an obtuse angle, and the V bends in the inner plate and the outer plate are aligned. When an underbody blast event is encountered by the vehicle, the outer plate is forced towards, and substantially against the inner plate such that fluid communication via each of the first openings is reduced or prevented.

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1. An armor structure for a vehicle underbody, the armor structure comprising: an inner plate that is mounted proximate to the vehicle underbody, the inner plate having a plurality of first openings formed through opposing planar surfaces of the inner plate; andan outer plate that is mounted distal

1. An armor structure for a vehicle underbody, the armor structure comprising: an inner plate that is mounted proximate to the vehicle underbody, the inner plate having a plurality of first openings formed through opposing planar surfaces of the inner plate; andan outer plate that is mounted distal to the vehicle underbody, the outer plate having a plurality of second openings formed through opposing planar surfaces of the outer plate, wherein the inner plate and the outer plate are substantially parallel and separated by a spacing;the inner plate and the outer plate each have substantially equal V bends at an obtuse angle, and the V bends in the inner plate and the outer plate are aligned;the first openings and the second openings are (i) substantially equal in area, and (ii) implemented at an angle other than perpendicular to the planar surfaces of the inner plate and the outer plate; wherein, the first openings and the second openings are aligned and provide fluid communication through the armor structure; andwhen an underbody blast event is encountered by the vehicle underbody, the outer plate is forced towards, and substantially against the inner plate such that the first and second openings are no longer aligned, and such that fluid communication via each of the first openings is reduced or prevented. 2. The armor structure of claim 1, wherein the inner plate is thicker than the outer plate. 3. The armor structure of claim 2, wherein the inner plate is at least twice as thick as the outer plate. 4. The armor structure of claim 2, wherein the inner plate is at least five times as thick as the outer plate. 5. The armor structure of claim 1, wherein the armor structure further comprises: a plurality of valves, each valve having a bendable hinge, the bendable hinge fastened on the side of the inner plate that faces the outer plate; and each of the valves is positioned and aligned with respect to one of the first openings such that, when the underbody blast event is encountered, the outer plate will push against the valve, the hinge will bend, and the valve will block the first opening such that there is no longer fluid communication through the first opening. 6. The armor structure of claim 5, wherein the valves are implemented as at least one of a tab valve and an accordion valve. 7. The armor structure of claim 1, wherein the armor structure further comprises: a filling in the spacing, and the filling includes a plurality of continuous passages that are implemented to connect each of the first openings and the second openings across the spacing from each other, the filling is compressible or crushable, and during the underbody blast event, the filling is compressed or crushed. 8. The armor structure of claim 5, wherein the armor structure further comprises: a filling in the spacing, and the filling includes a plurality of continuous passages that are implemented to connect each of the first openings and the second openings across the spacing from each other, the filling is compressible or crushable, and during the underbody blast event, the filling is compressed or crushed. 9. The armor structure of claim 8, wherein the valves are implemented as at least one of a tab valve and an accordion valve. 10. An armor structure for a vehicle underbody, the armor structure comprising: an inner plate that is mounted proximate to the vehicle underbody, the inner plate having a plurality of first openings formed through opposing planar surfaces of the inner plate; andan outer plate that is mounted distal to the vehicle underbody, the outer plate having a plurality of second openings formed through opposing planar surfaces of the outer plate, wherein the inner plate and the outer plate are substantially parallel and separated by a spacing;the inner plate and the outer plate each have substantially equal V bends at an obtuse angle, and the V bends in the inner plate and the outer plate are aligned;at least one of the first openings or one of the second openings is a combination of a plurality of merged passages that are combined to provide a single opening into the spacing; wherein, the first openings and the second openings are aligned and provide fluid communication through the armor structure; andwhen an underbody blast event is encountered by the vehicle underbody, the outer plate is forced towards, and substantially against the inner plate such that the first and second openings are no longer aligned, and such that fluid communication via each of the first openings is reduced or prevented. 11. The armor structure of claim 10, wherein the inner plate is thicker than the outer plate. 12. The armor structure of claim 11, wherein the inner plate is at least twice as thick as the outer plate. 13. The armor structure of claim 11, wherein the inner plate is at least five times as thick as the outer plate. 14. The armor structure of claim 10, wherein the armor structure further comprises: a plurality of valves, each valve having a bendable hinge, the bendable hinge fastened on the side of the inner plate that faces the outer plate; and each of the valves is positioned and aligned with respect to one of the first openings such that, when the underbody blast event is encountered, the outer plate will push against the valve, the hinge will bend, and the valve will block the first opening such that there is no longer fluid communication through the first opening. 15. The armor structure of claim 14, wherein the valves are implemented as at least one of a tab valve and an accordion valve. 16. The armor structure of claim 10, wherein the armor structure further comprises: a filling in the spacing, and the filling includes a plurality of continuous passages that are implemented to connect each of the first openings and the second openings across the spacing from each other, the filling is compressible or crushable, and during the underbody blast event, the filling is compressed or crushed. 17. The armor structure of claim 14, wherein the armor structure further comprises: a filling in the spacing, and the filling includes a plurality of continuous passages that are implemented to connect each of the first openings and the second openings across the spacing from each other, the filling is compressible or crushable, and during the underbody blast event, the filling is compressed or crushed. 18. The armor structure of claim 17, wherein the valves are implemented as at least one of a tab valve and an accordion valve.