초록 ▼

A blast-resistant cargo container includes side panels and connecting members. The connecting members are mounted between the adjacent side panels to create a frameless structure of the cargo container. Under ordinary conditions, the structure still has sufficient stiffness for loading goods. When a

A blast-resistant cargo container includes side panels and connecting members. The connecting members are mounted between the adjacent side panels to create a frameless structure of the cargo container. Under ordinary conditions, the structure still has sufficient stiffness for loading goods. When an explosive blast occurs in the cargo container, the structure is flexible and utilizes membrane strength in the entire container structure, whereby the cargo container is capable of withstanding the explosive blast. Bottom perimeter bars are able to be mounted around a bottom surface of the cargo container. Grooves are defined in the perimeter bars and L-shaped flanges are formed on one end of the connecting members. Therefore, by receiving the L-shaped flanges into the grooves, the perimeter bars are securely connected with the side panels.

대표청구항 ▼

What is claimed is: 1. A blast-resistant cargo container comprising: multiple side panels which are able to be assembled to form a chamber of the container, at least one of said panels is of high tensile strength, at least one of said panels whose span thickness ratio is greater than a ratio of 50

What is claimed is: 1. A blast-resistant cargo container comprising: multiple side panels which are able to be assembled to form a chamber of the container, at least one of said panels is of high tensile strength, at least one of said panels whose span thickness ratio is greater than a ratio of 50 to 1; and multiple connecting members which are able to transmit tensile forces directly or indirectly between every two adjacent side panels when a blast occurs, said connecting members comprising at least one plastically stretched connecting member with curve cross section which is securely mounted between two adjacent said side panels and is able to be plastically stretched to near a straight cross section under a blast, whereby the structure formed by said side panels and said connecting members has sufficient stiffness for normal operations and is a flexible structure deformed to near a sphere to confine an explosive blast in the structure under a blast. 2. The blast-resistant cargo container as claimed in claim 1, wherein the connecting members which intersect at a corner of the container are not securely connected to each other such that the stress concentration in the corner is able to be relieved. 3. The blast-resistant cargo container as claimed in claim 1, wherein the at least one plastically stretched connecting members is either two layer or single layer connecting member and connected to said adjacent side panels with overlap. 4. The blast-resistant cargo container as claimed in claim 3, wherein at least one layer of said two layer connecting member has an arcuate cross-section comprising a plurality of straight segments. 5. The blast-resistant cargo container as claimed in claim 3, wherein at least one layer of the two layer connecting member has a crinkled cross-section. 6. The blast-resistant cargo container as claimed in claim 3, wherein at least one spacer is disposed between the two layers of said two layer connecting member in order to reinforce bending stiffness of said two layer connecting member when the cargo container is too flexible to be operated as normal. 7. The blast-resistant cargo container as claimed in claim 1, wherein the at least one plastically stretched connecting member has a bubble shaped cross-section. 8. The blast-resistant cargo container as claimed in claim 1, wherein a cap is mounted at each corner of the container and securely connected to only one surrounding side panel. 9. The blast-resistant cargo container as claimed in claim 1, wherein said plastically stretched connecting member is made of a ductile material. 10. The blast-resistant cargo container as claimed in claim 9, wherein the ductile material of the at least one plastically stretched connecting member is selected from the group of metals consisting of stainless steel and high ductility aluminum alloy. 11. The blast-resistant cargo container as claimed in claim 1, wherein at least one of said side panels of high tensile strength is selected from a group of plates consisting of fiber-reinforced composite, laminated composite, metal laminated composite and high strength aluminum alloy plates. 12. The blast-resistant cargo container as claimed in claim 1, wherein the plastically stretched connecting member is manufactured by either sheet metal bending or extrusion. 13. The blast-resistant cargo container as claimed in claim 1, wherein span-thickness ratios of said side panels are greater than a ratio of 200 to 1 for the side panels being made of a material having a ductile feature with a ductility much less than that of the at least one plastically stretched connecting member. 14. A blast-resistant cargo container comprising: multiple side panels which include a bottom panel and are able to be assembled to form a chamber of the container, at least one of said panels is of high tensile strength, at least one of said side panels whose span-thickness ratio is greater than a ratio of 50 to 1; at least one perimeter bar which is securely mounted around said bottom panel and has a groove defined therein; multiple connecting members which are able to transmit tensile forces directly or indirectly between every two adjacent side panels when a blast occurs; wherein said multiple connecting members comprise at least one plastically stretched connecting member with curve cross section which is securely mounted between two adjacent said side panels and is able to be plastically stretched to near a straight cross section under a blast; and at least one L-shaped connecting member which has a lower end formed as a L-shaped flange to be received in said groove of said perimeter bar and is securely mounted to the adjacent side panel of said bottom panel on an upper end of said L-shaped connecting member, wherein the upper end of said L-shaped connecting members is able to rotate to said perimeter bar greatly under a blast such that the L-shaped connecting member is able to transmit tensile force between said bottom panel and said adjacent side panels through said perimeter bar when a blast occurs, whereby the structure formed by said side panels and said connecting members has sufficient stiffness for normal operations and is a flexible structure deformed to near a sphere to confine an explosive blast in the structure under a blast. 15. The blast-resistant cargo container as claimed in claim 14, wherein said at least one perimeter bar is an extruded bar. 16. The blast-resistant cargo container as claimed in claim 14, wherein at least one of said side panels of high tensile strength is selected from a group of plates consisting of fiber-reinforced composite, laminated composite, metal laminated composite and high strength aluminum alloy plates. 17. The blast-resistant cargo container as claimed in claim 14, wherein the plastically stretched connecting member and L-shaped connecting member are made of ductile materials. 18. The blast-resistance cargo container as claimed in claim 17, wherein the ductile materials of the plastically stretched connecting member are selected from the group of metals consisting of stainless steel and high ductility aluminum alloy. 19. The blast-resistant cargo container as claimed in claim 14, wherein a cap is mounted at each corner of the container and securely connected to only one surrounding side panel.