A vehicle side door internally includes an impact beam which extends along a longitudinal axis of a door. The impact beam is attached to a door inner panel via an outer extension. An inner extension is attached inside the outer extension. A distance along thickness of the door between the inner extension and the impact beam is shorter in a close proximity section than in a longitudinally neighboring area. Because the load received by the inner extension via the close proximity section is transferred to joint portions connecting to the outer extension, the load received by the outer extension from the impact beam is dispersed.

Provided is a method of manufacturing a vehicle skeleton member, the skeleton member including one or more groove-shaped portions extending in a predetermined direction, the method including an extrusion step and a press-working step. In the extrusion step, a sheet-shaped member including one or more first sheet-shaped portions each having a band-like shape, which extend in the predetermined direction, and second sheet-shaped portions each having a band-like shape, which extend in the predetermined direction along end portions of the first sheet-shaped portion in a width direction of the first sheet-shaped member and each have a sheet thickness smaller than a sheet thickness of the first sheet-shaped portion, is manufactured by using an extrusion molding method. In the press-working step, the sheet-shaped member is pressed so that at least part of a bottom wall portion of the groove-shaped portion is formed of the first sheet-shaped portion and side wall portions of the groove-shaped portion are formed of the second sheet-shaped portions, respectively.

A door structure for a vehicle may include an external panel that forms an external side surface of the vehicle; a reinforcement beam that is engaged with the external panel; an internal panel of a reinforced plastic material that is engaged with the reinforcement beam; and a fastener that fixes the internal panel and the reinforcement beam.

A door structure for a vehicle may include an external panel; an internal panel that is mounted to the external panel; and an impact member coupled to the internal panel between the external panel and the internal panel, wherein a protrusion that protrudes to an outside thereof toward a side external panel of a vehicle body from inside the internal panel is integrally provided in the impact member.

A vehicle door includes a door inner, a beam having a first end and a second end spaced from each other along a longitudinal axis, and a bracket. The bracket is fixed to the door inner and the beam, with the bracket between the door inner and the first end of the beam. The beam includes a cutout extending along the longitudinal axis to the first end.

A vehicle door including a door inner and a reinforcing beam fixed to the door inner. The reinforcing beam includes a first layer and a second layer bonded to each other. The first layer includes a polymer and fibers impregnated in the polymer and extending continuously across the polymer of the first layer. The first layer extends along an axis and has first and second ends spaced from each other on the axis. The second layer includes a polymer and fibers impregnated in the polymer and extending continuously across the polymer of the second layer. The second layer has first and second ends spaced from each other on the axis. The first and second ends of the second layer are each disposed between the first and second ends of the first layer along the axis.

A side structure for a vehicle includes a seat support structure arranged inside a vehicle body and coupled to a floor of the vehicle body, and a side sill arranged proximate to the floor of the vehicle body. A door is coupled to the vehicle body and includes a first end arranged proximate to the floor of the vehicle body and a second end arranged proximate to a top of the vehicle body. Moreover, the door includes a beam extending in a longitudinal direction of the door. A bracket is arranged inside the vehicle body and disposed between the seat support structure and the door in a lateral direction. The beam is configured to engage with the bracket during a deformation of the door.

A vehicle door structure includes: a door inner including a body wall portion, a first opposed wall portion, and a second opposed wall portion; a door outer panel; an impact beam; an impact beam extension including a door-inner-side end portion and a fixed end; and a first reinforcement including a support portion fixed to the first opposed wall portion and a free end portion extending from the support portion toward the impact beam, wherein the impact beam extension and the free end portion are configured to be fitted to each other.

A steel sheet member combination structure includes: a first steel sheet member having a main wall portion, a standing wall portion that stands from an end edge of the main wall portion, and a flange portion that extends parallel to the main wall portion from an end edge of the standing wall portion; and a second steel sheet member having a horizontal wall portion that is joined to at least one of an inner surface or an outer surface of the first steel sheet member and that abuts the main wall portion and a side wall portion that abuts the standing wall portion, and the first steel sheet member and the second steel sheet member satisfy predetermined relational expressions.

A frame structure for a vehicle door and a method of manufacture thereof is disclosed. In particular, a vehicle side door includes at least two tubular parts which are flexurally deformed in the direction of their longitudinal extension and connected to each other to form a ring structure. The ring structure incorporated into a structural unit with the frame structure and a crash reinforcement in a vehicle door of a motor vehicle.