A method includes designing a part. The part includes at least one internal structure. The internal structure is designed to provide strain mitigation, energy dissipation, or impact resistance for the part during an emergency condition. The part is built by a layer-by-layer additive manufacturing process. While building the part, the internal structure is connected to the part.

A method includes designing a part. The part includes at least one internal structure. The internal structure is designed to provide strain mitigation, energy dissipation, or impact resistance for the part during an emergency condition. The part is built by a layer-by-layer additive manufacturing process. While building the part, the internal structure is connected to the part.

The present invention relates to a bumper system for a vehicle, and provides a bumper system for a vehicle, the system comprising: a bumper beam which has a fastening hole formed through each end thereof in the forward and backward direction; a crash box which is inserted into the fastening hole of the bumper beam; and a bracket which is fastened to the bumper beam so as to be able to prevent the crash box from being separated. Thereby, the system can meet both low speed crash regulations and RCAR performance.

The present invention relates to a bumper system for a vehicle, and provides a bumper system for a vehicle, the system comprising: a bumper beam which has a fastening hole formed through each end thereof in the forward and backward direction; a crash box which is inserted into the fastening hole of the bumper beam; and a bracket which is fastened to the bumper beam so as to be able to prevent the crash box from being separated. Thereby, the system can meet both low speed crash regulations and RCAR performance.

An inversion-formed double-walled tube includes an outer tube having an outer wall thickness, an inner tube disposed inside the outer tube and having an inner wall thickness, and a transition portion connecting the inner tube and the outer tube. In this arrangement, at least one of the inner and outer wall thicknesses varies along a length of the double-walled tube. The inversion-formed double-walled tube may be configured as an inversion tube type energy absorber and as an energy absorbing inversion tube assembly.

An inversion-formed double-walled tube includes an outer tube having an outer wall thickness, an inner tube disposed inside the outer tube and having an inner wall thickness, and a transition portion connecting the inner tube and the outer tube. In this arrangement, at least one of the inner and outer wall thicknesses varies along a length of the double-walled tube. The inversion-formed double-walled tube may be configured as an inversion tube type energy absorber and as an energy absorbing inversion tube assembly.

A structural member 10 includes a hat member 1 and a closing plate 2. The length LY of the tubular portion formed by the hat member 1 and the closing plate 2 is 6 or more times the height H of a pair of side walls 11 and 12. Each of the side walls 11 and 12 includes a high-strength portion 11A or 12A and low-strength portions 11B or 12B. The high-strength portion has a yield strength not less than 500 MPa. The low-strength portions have a yield strength of 60 to 85% of that of the high-strength portion. Each high-strength portion extends a distance not less than (⅔)H and not more than 3H as measured in the direction in which the ridges extend, and is provided such that the high-strength portions of the pair of side walls face each other. A pair of low-strength portions sandwich the associated high-strength portion.

An electric disc brake is disclosed. An electric disc brake comprises a caliper housing configured to include a cylinder at which a piston is installed to be reciprocally movable by a brake hydraulic pressure, an adjuster arranged inside the piston, a pushrod provided inside the cylinder, an actuator configured to decelerate a rotational force according to an activation of a motor to output the decelerated rotational force through an output gear so as to pressurize the piston, and a ramp unit installed inside the cylinder and configured to receive the decelerated rotational force from the actuator to pressurize the pushrod to the piston so as to prevent rotation of the pushrod.

An energy absorption device for safety nets and/or for rope constructions, in particular an impact damping device and/or a shock damping device and/or a traction rope brake device, has a brake unit which comprises at least one deflection element and at least one brake element extending at least section-wise around the deflection element and which is configured for an at least partial absorption and/or conversion of kinetic energy in at least one load case, in particular an impact case, and has a connection unit, which is configured for a fixation of the brake unit in at least one location of use, wherein the brake element is guided around the deflection element in a U-shape, wherein the brake element includes at least one first brake portion and at least one second brake portion, the brake portions differing from one another at least in regard to their local load capacities, and the first brake portion including at least one material recess, in particular an oblong hole.

A shock absorbing member of the present disclosure is a shock absorbing member including a first hollow member (11) and a second hollow member (12) that are made of aluminum alloy and are weld joined to each other, in which a weld material and weld beads (W) do not project from a side on which a joined surface between the first hollow member (11) and the second hollow member (12) is located.