A crash box may include one or more layers arranged to absorb crash energy. In some embodiments, the crash box includes a first layer having an outer skin defining a periphery of the first layer and at least one of: 1) a rib and web structure, and 2) an array of tubes disposed within the outer skin for absorbing crash energy, and a second layer adjacent to the first layer, the second layer having an outer skin defining a periphery of the second layer and at least one of: 1) a rib and web structure, and 2) an array of tubes disposed within the outer skin for absorbing crash energy.

A body limb protection system includes an outer layer, an inner layer, and a force dampening and defusing structure. The outer layer includes a first material composition and has an exterior surface that includes a substantially planer area. The inner layer includes a second material composition and has a shape corresponding to a body limb portion. The force dampening and defusing structure is positioned between the inner layer and the outer layer. The force dampening and defusing structure has a shape corresponding to a difference between the shapes of the inner and outer layers. The force dampening and defusing structure includes a plurality of components arranged to reduce pressure on the body limb portion when a force is applied to the substantially planer area.

A helmet comprising first and second parts and a connector connecting the first and second parts of the helmet, the connector comprising: a first plate; a first anchor point on one side of the first plate, configured to be connected to the first part; a second plate located on an opposite side of the first plate from the first anchor point; a second anchor point on an opposite side of the second plate from the first plate, configured to be connected to the second part; a low friction interface provided between opposing surfaces of the first and second plates; and a cuff of deformable material provided around the first and second plates, and configured to at least partially cover the side of the first plate on which the first anchor point is located and to at least partially cover the side of the second plate on which the second anchor point is located.

A helmet comprising first and second parts and a connector connecting the first and second parts of the helmet, the connector comprising: a first plate; a first anchor point on one side of the first plate, configured to be connected to the first part; a second plate located on an opposite side of the first plate from the first anchor point; a second anchor point on an opposite side of the second plate from the first plate, configured to be connected to the second part; a low friction interface provided between opposing surfaces of the first and second plates; and a cuff of deformable material provided around the first and second plates, and configured to at least partially cover the side of the first plate on which the first anchor point is located and to at least partially cover the side of the second plate on which the second anchor point is located.

An adjustable circular tube energy absorption/storage mechanism based on a paper-cut structure is disclosed according to the present application, which belongs to the technical field of advanced intelligent structure. The mechanism is based on the conventional circular tube and obtained by partially cutting the circular tube. The direction of the slits is along the axial direction of the circular tube. Multiple circular tubes may be arrayed in a specific way according to the actual application requirements. When the circular tube is subjected to axial impact force, the cutting section of the circular tube may deform in a specific direction, the circular tube realizes structural energy absorption and energy storage through local buckling deformation, and after the external force is removed, the circular tube recovers from the deformation and releases stored energy.

A vehicle component has at least one sandwich part which forms a crash element that absorbs kinetic energy. The at least one sandwich part has a layer structure of at least two fiber-reinforced and one synthetic resin matrix-containing cover layer elements and at least one core layer element provided between two adjacent cover layer elements. The at least one core layer element has channels which pass transversely through each cover layer element and/or the core layer element. The at least one core layer element is made of a hard foam material or a softwood, and the channels provided in the core layer element form predetermined breaking points for the core layer element.

A vehicle component has at least one sandwich part which forms a crash element that absorbs kinetic energy. The at least one sandwich part has a layer structure of at least two fiber-reinforced and one synthetic resin matrix-containing cover layer elements and at least one core layer element provided between two adjacent cover layer elements. The at least one core layer element has channels which pass transversely through each cover layer element and/or the core layer element. The at least one core layer element is made of a hard foam material or a softwood, and the channels provided in the core layer element form predetermined breaking points for the core layer element.

An impact absorber device (10) of a fixed landing skid of an aircraft (1) is described. The device comprises a female element (20), a male element (30) and a core (40) arranged between said female element and said male element, wherein said female element comprises a cavity and said male element comprises a support and pressure surface for supporting said core, wherein said core comprises a body with controlled plastic deformation of a metallic material. In embodiments of the invention, the core comprises an extruded body having a honeycomb structure or a body comprising a spirally wound metallic substrate.

A nonlinear mechanical element including a buckling column and hard stops. In one embodiment when the nonlinear mechanical element is subjected to an increasing compressive load, the buckling column buckles at a critical load, resulting in reduced stiffness past the critical load. One or more lateral hard stops may be provided adjacent to the buckling column to prevent the buckling deformation from exceeding a certain extent, and axial hard stops may be provided to shift the load path away from the buckling column when a certain amount of compressive displacement has been reached.

An energy absorber includes a flexible tensile member having lengthwise sections arranged serially along a length of the flexible tensile member. Lengthwise sections define convolutions. Features are provided for both restricting straightening of the convolutions and automatically reconfiguring, in response predetermined tension in the flexible tensile member, to allow straightening of the convolutions.