Rocker assembly with a pultruded load distribution insert
A rocker assembly includes a rocker reinforcement panel attached to a side inner panel to define a cavity and an elongated bar disposed within the cavity. The elongated bar is formed of a polymer resin that includes reinforcement strands of continuous fiber roving that are embedded in the polymer resin and extend along a full length of the bar. The elongated bar has a constant cross-section perpendicular to the length of the bar that may define at least one elongated opening. A method of making a rocker assembly includes pultruding a polymer resin and a continuous fiber roving to form a reinforced elongated bar that is assembled into a cavity defined between the rocker reinforcement panel and the side inner panel.
1. A rocker assembly comprising:
a rocker reinforcement panel;
a side inner panel attached to the rocker reinforcement panel and defining a cavity; and
an elongated bar having a constant cross-section perpendicular to the length of the bar and defining a plurality of elongated openings disposed within the cavity, the bar includes polymer resin including strands of continuous fiber roving that are embedded in the polymer resin and extend along a full length of the bar.
2. The rocker assembly of claim 1 wherein the elongated bar has a constant cross-section perpendicular to the length of the bar and further comprises:
a plurality of inner walls that divide the elongated opening into a plurality of cells that extend throughout the length of the bar.
3. The rocker assembly of claim 1 further comprising:
a structural expanded foam polymer composition deposited in the elongated opening, wherein the foam polymer composition has a density of between 0.2 g/cc to 0.9 g/cc.
4. The rocker assembly of claim 3 wherein the foam polymer composition is polyurethane foam.
5. The rocker assembly of claim 1 wherein the polymer resin is polyethylene terephthalate.
6. The rocker assembly of claim 1 wherein the reinforcement strands of continuous fiber are selected from the group consisting of:
carbon fibers;
aramid fibers;
glass fibers; and
basalt fibers.
7. A rocker assembly comprising:
a rocker reinforcement panel;
a side inner panel attached to the rocker reinforcement panel and defining a cavity; and
an elongated bar disposed within the cavity, the bar includes polymer resin including strands of continuous fiber roving that are embedded in the polymer resin that extend along a full length of the bar, wherein the reinforcement strands of continuous fiber are in specified areas of the elongated bar where it is desired to increase strength locally, and wherein strands are spaced apart in other areas of the bar to provide areas of greater ductility and less strength.
8. The rocker assembly of claim 7 further comprising:
fastener receiving lengthwise extending strips provided in the other areas of the bar that are of greater ductility.
9. A rocker assembly comprising:
a rocker reinforcement panel;
a side inner panel attached to the rocker reinforcement panel and defining a cavity; and
an elongated bar disposed within the cavity, the bar includes polymer resin that includes reinforcement strands of continuous fiber roving that are embedded in the polymer resin and extend along a full length of a plurality of outer walls of the bar that define an elongated opening, wherein the elongated bar has a constant cross-section perpendicular to the length of the bar and a plurality of inner walls that divide the elongated opening into a plurality of cells that extend throughout the length of the bar, wherein the reinforcement strands of continuousfiber roving are embedded in the polymer resin and extend along a full length of the inner walls and the outer walls.
10. A method of making a rocker assembly comprising:
forming a rocker reinforcement panel;
forming a side inner panel;
assembling the rocker reinforcement panel to the side inner panel;
pultruding a polymer resin and a continuous fiber roving to form a reinforced elongated bar;
forming an elongated opening in the reinforced elongated bar; and
assembling the reinforced elongated bar into a cavity defined between the rocker reinforcement panel to the side inner panel.
11. The method of claim 10 further comprising:
forming a plurality of elongated openings in the reinforced elongated bar.
12. The method of claim 10 further comprising:
forming an elongated opening in the reinforced elongated bar;
injecting an expandable polymeric resin into the elongated opening in the reinforced elongated bar; and
foaming the expandable polymeric resin to fill the elongated opening.
13. The method of claim 10 further comprising:
forming a plurality of elongated openings in the reinforced elongated bar;
injecting an expandable polymeric resin into the elongated openings in the reinforced elongated bar; and
foaming the expandable polymeric resin to fill the elongated openings.