A door structure includes a door panel, a first beam member, a first bracket attached to a rear end portion of the first beam member, a second beam member formed separately from the first beam member, a second bracket attached to a rear end portion of the second beam member and formed separately from the first bracket, and a coupling member, to which the first bracket and the second bracket are fixed to be arranged side by side, and which is attached to the door panel. The coupling member includes an extending portion extending in a vehicle width direction between the first bracket and the second bracket.

A vehicle door assembly includes inner and outer door panels, first and second support brackets, a reinforcing panel, a window opening support panel and a side mirror assembly. The first support bracket is attached to the inner door panel. The reinforcing panel is attached to the first support bracket. The second support panel attached to the first support panel and the reinforcing panel. The window opening support panel is attached to the inner door panel, the second support panel and the reinforcing panel. The outer door panel is fixed to the inner door panel such that the inner door panel and the outer door panel define a door cavity therebetween. The side mirror assembly is installed along an exterior side of the outer door panel. The side mirror assembly includes fasteners that extend through the window opening support panel and the second support panel.

A door structure includes a door panel, a first beam member, a first bracket attached to a rear end portion of the first beam member, a second beam member formed separately from the first beam member, a second bracket attached to a rear end portion of the second beam member and formed separately from the first bracket, and a coupling member, to which the first bracket and the second bracket are fixed to be arranged side by side, and which is attached to the door panel. The coupling member includes an extending portion extending in a vehicle width direction between the first bracket and the second bracket.

A panel assembly for a vehicle made of different materials with different coefficients of thermal expansion according to various exemplary embodiments of the present invention includes: an external panel 10, an internal panel 20 having the circumference bonded to the circumference of the external panel 10, and made of a material having a coefficient of thermal expansion different from a coefficient of thermal expansion of the external panel 10, and at least one deformation absorption panel 30, 40 connected to at least one of the external panel 10 and the internal panel 20 on the circumferences of the external panel 10 and the internal panel 20, and for absorbing an amount of thermal deformation according to a change in temperatures of the external panel 10 and the internal panel 20 when the external panel 10 and the internal panel 20 are thermally deformed.

A vehicle door assembly includes an outer panel and an inner panel. The outer panel has an inboard surface and an outboard surface. A door handle receiving area is disposed in the outer door panel and is configured to receive a door handle. The inner panel has an inboard surface and an outboard surface. The inner panel is connected to the outer panel. A first stiffener member is disposed beneath the door handle receiving area. A second stiffener member is disposed above the door handle receiving area.

There are provided a vehicle-body frame member forming an opening portion for entrance at a vehicle side part and a front side door provided so as to open and close the opening portion. The vehicle-body frame member comprises a side sill, the front side door comprises a door panel portion provided with an inner lower portion which overlaps with the side sill in a vehicle wide view and reinforcement portions provided at three side-portions of a peripheral part of the door panel portion which are continuous and include the inner lower portion such that the reinforcement portions overlap with the vehicle-body frame member in a vehicle side view.

A side door comprises a door panel portion and a reinforcement portion (a lower-side reinforcement portion and others). The door panel portion is provided to cover an opening portion for entrance and configured such that its peripheral part overlaps with an opening-portion-forming vehicle-body frame member (a side sill and others) in a vehicle side view. The reinforcement portion is provided at the peripheral part of the door panel portion such that it overlaps with the opening-portion-forming vehicle-body frame member in the vehicle side view, thereby reinforcing the peripheral part of the door panel portion against a collision load applied to the side door from a vehicle side. The reinforcement portion is provided at a portion of the peripheral part of the door panel portion which includes a part corresponding to the vehicle-width-direction-extending vehicle-body frame member (a first floor cross member and others).

A tailgate assembly mounted along an open edge of a vehicle's load carrying bed includes a frame having a first or proximal lateral side adapted to be hingedly connected for opening in a swing open mode and a second or distal lateral side oppositely positioned relative to the first lateral side. The tailgate assembly further includes a reinforcement frame component overlaid onto the frame at the first lateral side to increase torsional stiffness at or near the first lateral side.

A liftgate structure having a composite inner panel with an outside surface having a lower perimeter surface area extending across the entire width of the composite liftgate structure. Connectable to the inner panel is a composite outer panel that has an inside surface with a lower perimeter surface area extending across substantially the entire width of the liftgate structure. Between the inner panel in the outer panel is a backing curtain. The backing curtain is connected to the outside surface of the inner panel such that the backing curtain is positioned between the outer panel on the inner panel and extends substantially across both the lower perimeter surface area of the inner panel and the lower perimeter surface area of the outer panel. The backing curtain prevents broken pieces of the outer panel for moving past the backing curtain in the event of an impact on the liftgate structure.

A door of a vehicle may include a first door module forming a door skeleton; a second door module coupled with the first door module and forming a door window; and a door frame coupled to the first door module and engaged with the second door module; wherein the second door module may include a relatively lightweight material as compared to the first door module, reducing weight and cost of the door for the vehicle.