Vehicle body joint structure

1. A vehicle body joint structure comprising:

a frame member made of a metal pipe, extending from a side of a vehicle body to be inclined vertically, and configured to form a front pillar; and

a body member made of a plastic composite material, including a dash connection part and a cowl connection part, joined to the frame member, and configured to cover the frame member.

2. The vehicle body joint structure of claim 1 , further comprising a corrugated part processed to having a predetermined surface roughness and provided on a surface of the frame member.

3. The vehicle body joint structure of claim 1 , further comprising a structural adhesive applied to a surface of the frame member.

4. The vehicle body joint structure of claim 1 , wherein the body member is formed of at least one of glass fiber reinforced plastics (GFRP), carbon fiber reinforced plastics (CFRP), or plastics.

5. The vehicle body joint structure of claim 1 , further comprising:

an upper joint cover joined to the body member and configured to cover an upper surface of the body member;

an inner joint cover joined to the body member and configured to cover the body member inside the vehicle body; and

an outer joint cover facing the inner joint cover, joined to the body member, and configured to cover the body member outside the vehicle body.

6. The vehicle body joint structure of claim 5 , further comprising:

corrugated parts processed to have a predetermined surface roughness, and provided on a bottom surface of the upper joint cover facing the body member, on an inner surface of the inner joint cover, and on an inner surface of the outer joint cover.

7. The vehicle body joint structure of claim 5 , wherein the inner joint cover and the outer joint cover are connected to each other on a rear surface of the body member and form an opening flange corresponding to an opening in the vehicle body.

8. The vehicle body joint structure of claim 5 , further comprising a cowl lower inner cover joined to the upper joint cover and extending toward a front of the inner joint cover.

9. The vehicle body joint structure of claim 5 , further comprising an outer reinforcement cover integrally joined to the upper joint cover and the outer joint cover and configured to cover the upper joint cover and the outer joint cover.

10. The vehicle body joint structure of claim 5 , wherein the inner joint cover includes a plurality of holes formed through inner and outer portions thereof, and

the plurality of holes is configured to receive a plastic resin melted by heat,

wherein when the plastic resin is cooled and solidified, a joining force between the body member and the inner joint cover is increased.

11. The vehicle body joint structure of claim 1 , further comprising a base member joined to the body member and configured to overlap a bottom surface and an inner side surface of the body member.

12. The vehicle body joint structure of claim 11 , further comprising an adhesive applied to a surface of the base member that comes into contact with the bottom surface and the inner side surface of the body member.

13. The vehicle body joint structure of claim 11 , further comprising:

an assembling protrusion protruding toward a counterpart and formed on the base member; and

an assembling groove matching the assembling protrusion and formed on the body member; and

wherein the assembling protrusion and the assembling groove extend in a lengthwise direction, are fitted into and joined to each other, and are configured to allow the body member and the base member to be joined to each other.

14. The vehicle body joint structure of claim 13 , further comprising a reinforcing rail fitted into and joined to the assembling groove.

15. The vehicle body joint structure of claim 11 , further comprising:

a first fastening groove formed on a contact surface of the body member and extending in a lengthwise direction;

a second fastening groove formed on a contact surface of the base member, configured to match with the first fastening groove, and extending in the lengthwise direction; and

a joining bar inserted and fitted into the first and the second fastening grooves, and configured to allow the body member and the base member to be joined to each other.

16. The vehicle body joint structure of claim 1 , further comprising:

a dash assembly forming a space frame vehicle body and joined to the dash connection part; and

a cowl joined to the cowl connection part and extending in a widthwise direction of the vehicle body.