To suppress deformation of a vehicle cabin by efficiently absorbing an impact load obliquely from a vehicle front side, a vehicle-body front structure includes an upper-side cross member, a lower-side cross member, upper-side impact absorption members that support respective ones of both vehicle-width-direction sides of the upper-side cross member, and lower-side impact absorption members that support respective ones of both vehicle-width-direction sides of the lower-side cross member. The upper-side impact absorption members and the lower-side impact absorption members are each positioned farther on a vehicle-width-direction outer side at a position farther on a vehicle front side.

A front body structure provided on a vehicle includes a bumper beam, a left frame and a right frame in pairs, stays, and gussets. The bumper beam extends in a left-right direction at a front end of the vehicle. The frames extend in a front-rear direction. The stays support the bumper beam. The stays are provided at front ends of the frames. The gussets are disposed separated from the bumper beam. Each of the gussets extend inclined outward in the left-right direction, and obliquely forward from an outer end of a corresponding one of the left frame and the right frame to ahead of a front end of a corresponding one of the left frame and the right frame. Each of the stays includes a bead at a predetermined position in the front-rear direction. Each of the beads extends in a circumferential direction of the respective one of the stays.

A front body structure provided on a vehicle includes a bumper beam, a left frame and a right frame in pairs, stays, and gussets. The bumper beam extends in a left-right direction at a front end of the vehicle. The frames extend in a front-rear direction. The stays support the bumper beam. The stays are provided at front ends of the frames. The gussets are disposed separated from the bumper beam. Each of the gussets extend inclined outward in the left-right direction, and obliquely forward from an outer end of a corresponding one of the left frame and the right frame to ahead of a front end of a corresponding one of the left frame and the right frame. Each of the stays includes a bead at a predetermined position in the front-rear direction. Each of the beads extends in a circumferential direction of the respective one of the stays.

A bumper system (4) for a motor vehicle comprising a cross beam (1) which is globally orientated in a transverse direction (Y), said cross beam comprising a front wall (6) adapted to receive a crash impact force and a rear wall (5) opposed and spaced from said front wall, at least one absorber (2), at least an intermediate component (3) to attach the absorber (2) to the cross beam (1), said intermediate component (3) being connected to the rear wall (5) through a first contact area (10), distant from a longitudinal axis (LL), by an internal component distance, called L.sub.in, and an external component distance, called L.sub.out, which corresponds respectively to the minimum and maximum distance between said first contact area (10) and the longitudinal axis (LL), said longitudinal axis (LL) passing at mid width of the cross beam and being perpendicular to the transverse direction (Y), said intermediate component (3) being connected to the absorber (2) through a second contact area (20) distant from the longitudinal axis (LL) by an internal profile distance, called D.sub.in, and an external profile distance, called D.sub.out, which corresponds respectively to the minimum and maximum distance between the second contact (20) area and the longitudinal axis (LL), wherein a part of the intermediate component distant from the longitudinal axis (LL) by a distance comprised between L.sub.out and D.sub.out has a smaller bending stiffness (S.sub.interm) about a vertical axis (Z) than a part of the cross beam distant from the longitudinal axis (LL) by a distance comprised between L.sub.out and D.sub.in (S.sub.cross), said vertical axis (Z) being perpendicular to the transverse direction (Y) and the longitudinal axis (LL).

A bumper system (4) for a motor vehicle comprising a cross beam (1) which is globally orientated in a transverse direction (Y), said cross beam comprising a front wall (6) adapted to receive a crash impact force and a rear wall (5) opposed and spaced from said front wall, at least one absorber (2), at least an intermediate component (3) to attach the absorber (2) to the cross beam (1), said intermediate component (3) being connected to the rear wall (5) through a first contact area (10), distant from a longitudinal axis (LL), by an internal component distance, called L.sub.in, and an external component distance, called L.sub.out, which corresponds respectively to the minimum and maximum distance between said first contact area (10) and the longitudinal axis (LL), said longitudinal axis (LL) passing at mid width of the cross beam and being perpendicular to the transverse direction (Y), said intermediate component (3) being connected to the absorber (2) through a second contact area (20) distant from the longitudinal axis (LL) by an internal profile distance, called D.sub.in, and an external profile distance, called D.sub.out, which corresponds respectively to the minimum and maximum distance between the second contact (20) area and the longitudinal axis (LL), wherein a part of the intermediate component distant from the longitudinal axis (LL) by a distance comprised between L.sub.out and D.sub.out has a smaller bending stiffness (S.sub.interm) about a vertical axis (Z) than a part of the cross beam distant from the longitudinal axis (LL) by a distance comprised between L.sub.out and D.sub.in (S.sub.cross), said vertical axis (Z) being perpendicular to the transverse direction (Y) and the longitudinal axis (LL).

A shock absorbing member which can increase impact absorption energy and also enables thinning of a steel sheet that is a starting material, a method for producing the shock absorbing member, and a method for producing a steel sheet for cold plastic working are provided. The shock absorbing member includes a ridge portion formed in a curved shape as viewed from a longitudinal direction, and a wall portion extending from the ridge portion. In the wall portion, a ratio σ.sub.5/τ.sub.5 between a tensile stress σ.sub.5 when an elongation in a tensile test is 5% and a shear stress τ.sub.5 when a shear strain in a shear test is 5√3% is 1.70 or less, or a ratio σ.sub.10/τ.sub.10 between a tensile stress σ.sub.10 when an elongation in a tensile test is 10% and a shear stress τ.sub.10 when a shear strain in a shear test is 10√3% is 1.70 or less.

A shock absorbing member which can increase impact absorption energy and also enables thinning of a steel sheet that is a starting material, a method for producing the shock absorbing member, and a method for producing a steel sheet for cold plastic working are provided. The shock absorbing member includes a ridge portion formed in a curved shape as viewed from a longitudinal direction, and a wall portion extending from the ridge portion. In the wall portion, a ratio σ.sub.5/τ.sub.5 between a tensile stress σ.sub.5 when an elongation in a tensile test is 5% and a shear stress τ.sub.5 when a shear strain in a shear test is 5√3% is 1.70 or less, or a ratio σ.sub.10/τ.sub.10 between a tensile stress σ.sub.10 when an elongation in a tensile test is 10% and a shear stress τ.sub.10 when a shear strain in a shear test is 10√3% is 1.70 or less.

The present disclosure provides a chassis collision structure of a new energy vehicle, comprising a front lower collision beam assembly, a front sub-frame assembly, a front battery pack bottom fender, a rear battery pack bottom fender, and a rear sub-frame assembly which are arranged sequentially along a direction from a head to a tail of a vehicle, wherein the front lower collision beam assembly is connected to a front end of the front sub-frame assembly; the front battery pack bottom fender is connected to a bottom of the front sub-frame assembly; the rear battery pack bottom fender is connected to a bottom of the rear sub-frame assembly; and connecting parts which are connected with a battery pack are arranged at one end of the front battery pack bottom fender and one end of the rear battery pack bottom fender, which are close to each other, respectively.

A vehicle front body structure is provided for reliably transferring a collision load to a crash can and a front frame by preventing a bumper beam from buckling during a small overlap collision. Bending rigidity of the bumper beam in a vehicle width direction is such that 1) a bending moment generated on the bumper beam when a collision load in a direction toward a vehicle rear side is applied to an extending section, which extends outward in the vehicle width direction from a crash can fixed section, is the highest in a vehicle width direction inner end portion of the crash can fixed section on a side where the collision load is applied, and 2) the bending moment is continuously reduced as a distance from the vehicle width direction inner end portion in the vehicle width direction increases.

A vehicle front body structure is provided for reliably transferring a collision load to a crash can and a front frame by preventing a bumper beam from buckling during a small overlap collision. Bending rigidity of the bumper beam in a vehicle width direction is such that 1) a bending moment generated on the bumper beam when a collision load in a direction toward a vehicle rear side is applied to an extending section, which extends outward in the vehicle width direction from a crash can fixed section, is the highest in a vehicle width direction inner end portion of the crash can fixed section on a side where the collision load is applied, and 2) the bending moment is continuously reduced as a distance from the vehicle width direction inner end portion in the vehicle width direction increases.