Skeletal component for automobile and front pillar lower including the same
A front pillar lower outer includes a bent portion, and a first region and a second region, and is a skeletal component for automobile that is assumed to receive a collision load along the extending direction of the first region. The outer is constituted by attaching a first member that is arranged on a first region side, and a second member that is arranged on a second region side. An attachment line of the both members is arranged in a predetermined zone between a first boundary and a second boundary. The plate thickness of the first member is larger than the plate thickness of the second member.
1. A skeletal component for automobile that is bent into an L shape along its longitudinal direction, and has a hat-shaped cross section all over skeletal component in its longitudinal direction, wherein
the skeletal component comprises a bent portion that includes an arc-shaped portion on an inside of bending and an arc-shaped portion on an outside of the bending, and a first region and a second region that extend from each of opposite ends of the bent portion, the skeletal component configured to receive a collision load in an extending direction of the first region,
the skeletal component is constituted by directly attaching a first member that is arranged on the first region side and a second member that is arranged on the second region side,
an attachment line of the first member and the second member is arranged in a predetermined zone between a first boundary on the first region side and a second boundary on the second region side,
the first boundary is a straight line that connects an end, on the first region side, of the arc-shaped portion on the inside of the bending, and an end, on the first region side, of the arc-shaped portion on the outside of the bending,
the second boundary is a straight line that runs from an end, on the second region side, of the arc-shaped portion on the inside of the bending along the extending direction of the first region, and
a plate thickness of the first member is larger than a plate thickness of the second member.
2. The skeletal component for automobile according to claim 1 , wherein
a ratio (t 1 /t 2 ) between a plate thickness (t 1 ) of the first member and a plate thickness (t 2 ) of the second member is 1.2 or more.
3. The skeletal component for automobile according to claim 2 , wherein
the skeletal component is a front pillar lower outer, and
the first region is coupled to a side sill, and the second region is coupled to a front pillar upper.
4. A front pillar lower comprising the skeletal component for automobile according to claim 3 .
5. The skeletal component for automobile according to claim 1 , wherein
the skeletal component is a front pillar lower outer, and
the first region is coupled to a side sill, and the second region is coupled to a front pillar upper.
6. A front pillar lower comprising the skeletal component for automobile according to claim 5 .
7. A skeletal component for automobile that is bent into an L shape along its longitudinal direction, and has a hat-shaped cross section all over skeletal component in its longitudinal direction, wherein
the skeletal component comprises a bent portion that includes an arc-shaped portion on an inside of bending and an arc-shaped portion on an outside of the bending, and a first region and a second region that extend from each of opposite ends of the bent portion, the skeletal component configured to receive a collision load in an extending direction of the first region,
the skeletal component is constituted by attaching a first member that is arranged on the first region side and a second member that is arranged on the second region side,
an attachment line of the first member and the second member is arranged in a predetermined zone between a first boundary on the first region side and a second boundary on the second region side,
the first boundary is a straight line that connects an end, on the first region side, of the arc-shaped portion on the inside of the bending, and an end, on the first region side, of the arc-shaped portion on the outside of the bending,
the second boundary is a straight line that connects an end, on the second region side, of the arc-shaped portion on the inside of the bending, and an end, on the second region side, of the arc-shaped portion on the outside of the bending, and
a plate thickness of the first member is larger than a plate thickness of the second member.
8. The skeletal component for automobile according to claim 7 , wherein
a ratio (t 1 /t 2 ) between a plate thickness (t 1 ) of the first member and a plate thickness (t 2 ) of the second member is 1.2 or more.
9. The skeletal component for automobile according to claim 8 , wherein
the skeletal component is a front pillar lower outer, and
the first region is coupled to a side sill, and the second region is coupled to a front pillar upper.
10. A front pillar lower comprising the skeletal component for automobile according to claim 9 .
11. The skeletal component for automobile according to claim 7 , wherein
the skeletal component is a front pillar lower outer, and
the first region is coupled to a side sill, and the second region is coupled to a front pillar upper.
12. A front pillar lower comprising the skeletal component for automobile according to claim 11 .