CN109436099A - A kind of regular polygon cross-section anti-collision structure applied to composite material automobile threshold - Google Patents
A kind of regular polygon cross-section anti-collision structure applied to composite material automobile threshold Download PDFInfo
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- CN109436099A CN109436099A CN201811092982.6A CN201811092982A CN109436099A CN 109436099 A CN109436099 A CN 109436099A CN 201811092982 A CN201811092982 A CN 201811092982A CN 109436099 A CN109436099 A CN 109436099A
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- regular polygon
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- polygon cross
- composite material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
- B62D29/04—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of synthetic material
- B62D29/043—Superstructures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/20—Floors or bottom sub-units
Abstract
The present invention relates to a kind of regular polygon cross-section anti-collision structures applied to composite material automobile threshold, it is characterised in that: including ontology and outer surface anti-impacting layer；Regular polygon cross-section fiber reinforcing texture lateral profile section and automobile door sill inside cavities section equal proportion, and regular polygon cross-section fiber reinforcing texture lateral profile section is provided with the bonding gap of 0 ~ 1 mm with automobile door sill inside cavities surface, it is bonded gap filling ductile structure glue, adhesive thickness is 1mm, fiber-reinforced tape is wound in regular polygon cross-section fiber reinforcing texture body exterior, outer surface anti-impacting layer is wound in regular polygon cross-section fiber reinforcing texture outer body with 45 ° of ﹢ and -45 ° of both directions, and winding layer number is 1 ~ 3 layer；Energy-absorbing filler is provided in body interior, energy-absorbing filler is using the foam section or filling of high energy-absorbing ratio in the hardened foam that foams certainly in cavity.It by regular polygon cross-section anti-collision structure outer profile and automobile door sill positioned internal, is fixed using ductile structure glue sticking, reduces welding tooling design, it is simple to operate.
Description
Technical field
The present invention relates to a kind of regular polygon cross-section anti-collision structures applied to composite material automobile threshold, using continuous
Fibre-reinforced composite material belongs to automobile anti-collision protective device technical field.
Background technique
With the development of automotive engineering, the requirement for vehicle passive safety is also gradually very high.It is mandatory as C-NCAP
The side collision of deformable mobile the obstacle speed 50km/h and vehicle of one of standard evaluation, exactly to door in vehicle passive safety
It the test of sill structure and intensity and considers, the anti-collision structure inside automobile door sill, which is directly related to automobile door sill when colliding, is
No to can be absorbed and disperse enough collision energies, the intrusion volume lowered the threshold reduces the injury to driver and passenger, and protection is interior
The life security of driver and passenger.At the same time, lightweight puts forward new requirements automobile industry, and exploitation meets lightweight and meets
The auto parts and components that industrial security requires, become the development trend of automobile industry instantly.Currently, having a plurality of uses in the market
Commercialization automobile of the composite material as the automobile structure of raw material, application site have composite material automobile top cover, compound
Material automotive floor panel, composite material automobile threshold etc..The density having using composite material is small, specific strength is high, anisotropy
The advantages that designability, the component developed have the features such as quality is small, and intensity is high, and fatigue durability is good.But related compound
Material parts design, and part associated with composite material parts are also required to require to carry out weight with operating condition for completely new
New innovative design.
It is original in metal automobile threshold by taking composite material automobile side wall and its affiliated composite material automobile threshold as an example
Inside is by way of welding manner connection segment formula metal threshold stiffening plate, because of part strength, Joining Technology and galvanic corrosion
Etc. reasons be not suitable for composite material automobile threshold.
Summary of the invention
Based on the above issues, the object of the present invention is to provide a kind of applied to the just polygon of composite material automobile threshold
Shape cross-section anti-collision structure improves composite material automobile doorsill structure intensity, when side collision occurs for automobile, reduces automobile
Threshold intrusion volume, and absorb impact energy with guarantee passenger safety, and Joining Technology it is simple, it is easy to produce with replacement, at
This is lower, without galvanic corrosion.
The technical scheme of the present invention is realized as follows: a kind of regular polygon applied to composite material automobile threshold etc. is cut
Face anti-collision structure, including regular polygon cross-section fiber reinforcing texture and energy-absorbing filler two parts；It is characterized by: just polygon
Shape cross-section fiber reinforcing texture includes ontology and outer surface anti-impacting layer；Regular polygon cross-section fiber reinforcing texture outboard wheel
Wide section and automobile door sill inside cavities section equal proportion, and regular polygon cross-section fiber reinforcing texture lateral profile section with
Automobile door sill inside cavities surface is provided with the bonding gap of 0 ~ 1 mm, is bonded gap filling ductile structure glue, and adhesive thickness is
1mm winds fiber-reinforced tape in regular polygon cross-section fiber reinforcing texture body exterior, and outer surface anti-impacting layer is with 45 ° of ﹢
It is wound in regular polygon cross-section fiber reinforcing texture outer body with -45 ° of both directions, winding layer number is 1 ~ 3 layer；In ontology
Energy-absorbing filler is provided in inside, energy-absorbing filler is using the foam section or filling of high energy-absorbing ratio in hard from foaming in cavity
Bubble foam.
The regular polygon cross-section fiber reinforcing texture ontology is made of multiple regular polygon structural units.
Power transmission reinforcing prop is provided at the regular polygon structural unit center, power transmission reinforcing prop passes through trapezoidal reinforcing rib
It is connect with regular polygon structural unit hard spot, power transmission reinforcing prop is longitudinally used as a continuous column structure that can effectively transmit in vehicle body
From the impact energy of vehicle body head-on crash, while the combination of power transmission reinforcing prop and trapezoidal reinforcing rib can be by the side suffered by vehicle body
Face collision energy effectively disperses to be transferred to other regular polygon structural units in regular polygon cross-section fiber reinforcing texture ontology.
The regular polygon structural unit side length is 5 ~ 30 mm, and the number on side is more than or equal to 4, preferably regular hexagon knot
Structure unit.
The regular polygon structural unit is with a thickness of 2 ~ 3 mm.
It is 3 ~ 5 mm that column diameter is reinforced in the power transmission.
The trapezoidal reinforcing rib is isosceles trapezoid, and wherein trapezoidal side and short transverse angle are 0 ° ~ 5 °, trapezoidal reinforcing rib
Design utilizes the angle of trapezoidal side and short transverse, and regular polygon cross-section anti-collision structure is made to bear stronger side collision
When, it can be along incident angle crumple energy-absorbing.
The regular polygon cross-section fiber reinforcing texture ontology, by along regular polygon cross-section anti-collision structure length side
To the carbon fiber of laying or the carbon fibre preform of braiding, pass through epoxy resin infiltration curing molding under pultrude process, choosing
Epoxy resin pultrusion velocity interval is 0.4 ~ 1 m/min, is spread using along regular polygon cross-section anti-collision structure length direction
If carbon fiber can effective bearing vehicle body forward direction collision impact can be targeted using the carbon fibre preform of braiding
Design regular polygon cross-section fiber reinforcing texture ontology load-carrying construction.
The regular polygon cross-section fiber reinforcing texture outer surface anti-impacting layer is by the superelevation after infiltration resin
One or more of molecular weight polyethylene fiber, aramid fiber, boron fibre, carbon fiber, fiberglass adhesive tape.
Good effect of the present invention is that it uses fibrous composite, compound suitable for being proposed under lightweight requirements instantly
It is rotten to avoid galvanic couple existing when original metallic strengthening structure is connect with composite material automobile threshold for material automobile threshold structure
Lose risk；It is produced using pultrude process, has continuous, efficient, automated production manufacturing capacity；Internal cavity uses continuous fiber
As reinforcing material, it is externally wrapped with fiber-reinforced tape in addition and inside cavity fills high energy-absorbing than foam, and by reasonable
Internal structure design effectively increases the strength and stiffness of composite material automobile threshold, reduces when side collision occurs for vehicle
The intrusion volume of automobile door sill, passes through trapezoidal reinforcing rib and high energy-absorbing absorption collision impact more effective than foam；By just more
Side shape cross-section anti-collision structure outer profile and automobile door sill positioned internal, are fixed using ductile structure glue sticking, reduce weldering
Fixture Design is connect, it is simple to operate.
Detailed description of the invention
Fig. 1 is the signal of regular polygon cross-section anti-collision structure and the assembly of composite material automobile threshold in the embodiment of the present invention
Figure.
Fig. 2 is the schematic diagram of regular polygon cross-section anti-collision structure in the embodiment of the present invention.
Fig. 3 is the schematic cross-section of regular polygon cross-section anti-collision structure in the embodiment of the present invention.
Specific embodiment
Further to illustrate that the present invention to reach the technical means and efficacy that predetermined subject invention is taken, combines thereafter
Attached drawing and preferred embodiment, to the regular polygon cross-section anticollision knot applied to composite material automobile threshold of proposition of the invention
Specific embodiment, structure, feature and effect of structure are illustrated, and it is described that detailed description are as follows.
A kind of regular polygon cross-section anti-collision structure applied to composite material automobile threshold, including regular polygon cross-section
Fiber reinforcing texture and energy-absorbing filler two parts；It is characterized by: regular polygon cross-section fiber reinforcing texture includes inside
Cavity and outer surface anti-impacting layer；Regular polygon cross-section fiber reinforcing texture lateral profile section and automobile door sill inside cavities
Section equal proportion is similar, and regular polygon cross-section fiber reinforcing texture lateral profile section and automobile door sill surface of internal cavity are arranged
There is the bonding gap of 0 ~ 1 mm, is bonded gap filling ductile structure glue, adhesive thickness 1mm can provide enough bonding forces, and
Size between part is received to match tolerance；Fiber-reinforced tape is wound in regular polygon cross-section fiber reinforcing texture body exterior,
Regular polygon cross-section fiber reinforcing texture outer surface anti-impacting layer is wound in regular polygon etc. with 45 ° of ﹢ and -45 ° of both directions
Cross-section fibers enhancing structure outer body, winding layer number are 1 ~ 3 layer；Energy-absorbing filler is provided in internal cavity, energy-absorbing is filled out
Object is filled using the foam section of high energy-absorbing ratio or filling in the hardened foam that foams certainly in cavity.
The regular polygon cross-section fiber reinforcing texture ontology is made of multiple regular polygon structural units.
Power transmission reinforcing prop is provided at the regular polygon structural unit center, power transmission reinforcing prop passes through trapezoidal reinforcing rib
It is connect with regular polygon structural unit hard spot, power transmission reinforcing prop is longitudinally used as a continuous column structure that can effectively transmit in vehicle body
From the impact energy of vehicle body head-on crash, while the combination of power transmission reinforcing prop and trapezoidal reinforcing rib can be by the side suffered by vehicle body
Face collision energy effectively disperses to be transferred to other regular polygon structural units in regular polygon cross-section fiber reinforcing texture ontology.
The regular polygon structural unit side length is 5 ~ 30 mm, and the number on side is more than or equal to 4, preferably regular hexagon knot
Structure unit.
The regular polygon structural unit is with a thickness of 2 ~ 3 mm.
It is 3 ~ 5 mm that column diameter is reinforced in the power transmission.
The trapezoidal reinforcing rib is isosceles trapezoid, and wherein trapezoidal side and short transverse angle are 0 ° ~ 5 °, trapezoidal reinforcing rib
Design utilizes the angle of trapezoidal side and short transverse, and regular polygon cross-section anti-collision structure is made to bear stronger side collision
When, it can be along incident angle crumple energy-absorbing.
The regular polygon cross-section fiber reinforcing texture ontology, by along regular polygon cross-section anti-collision structure length side
To the carbon fiber of laying or the carbon fibre preform of braiding, pass through epoxy resin infiltration curing molding under pultrude process, choosing
Epoxy resin pultrusion velocity interval is between 0.4 ~ 1 m/min.It is preferred that using long along regular polygon cross-section anti-collision structure
Spend carbon fiber that direction is laid with can effective bearing vehicle body forward direction collision impact, and the production of structure design and craft is more simple
Just；According to the carbon fibre preform of braiding, regular polygon cross-section fiber reinforcing texture ontology can be targetedly designed
Load-carrying construction.
The regular polygon cross-section fiber reinforcing texture outer surface anti-impacting layer is by the superelevation after infiltration resin
One or more of molecular weight polyethylene fiber, aramid fiber, boron fibre, carbon fiber, fiberglass adhesive tape pass through ± 45 °
Lay up design, effectively carrying improve the whole of regular polygon cross-section anti-collision structure from the face external applied load of vehicle body lateral impact
Body part strength.
Energy-absorbing filler in the regular polygon cross-section fiber reinforcing texture ontology, selects the foam of high energy-absorbing ratio
Profile or filling are buffered in, from the hardened foam that foams, effectively absorbing collision energy by the plastic deformation of foam structure in cavity
Impact force suffered by inside crew module improves the safety guarantee of interior driver and passenger.
The regular polygon cross-section anti-collision structure is fixed on automobile door sill inner cavity by ductile structure glue sticking mode,
Ductile structure glue can also effectively absorb outside guarantee regular polygon cross-section anti-collision structure is adhesively fixed and acts on and filtration fraction passes
It is directed at the vibration at automobile door sill position.
Embodiment 1
Fig. 1 is the signal of regular polygon cross-section anti-collision structure 100 and the assembly of composite material automobile threshold in the embodiment of the present invention
Figure.As shown in Figure 1, in the present embodiment regular polygon cross-section anti-collision structure 100 right side outer surface and composite material automobile
The fitting of 200 inner cavity surface of threshold internal plate, is fixed by ductile structure glue sticking between the two；Then by regular polygon cross-section anticollision knot
The left side outer surface of structure 100 coats ductile structure glue, is adhesively fixed with composite material automobile threshold outside plate inner cavity surface；Described
It is provided with 0 ~ 1 mm's between 100 outer wheels profile surface of regular polygon cross-section anti-collision structure and composite material automobile threshold surface of internal cavity
It is bonded gap, to coat space as above-mentioned ductile structure glue.Selected ductile structure glue is guaranteeing regular polygon cross-section
Anti-collision structure, which is adhesively fixed, to be acted on outside, can also effectively be absorbed and be conducted with filtration fraction to the vibration at automobile door sill position.By upper
Assembly is stated, regular polygon cross-section anti-collision structure 100 forms effective support in composite material automobile threshold inside cavity and prevents
Structure is hit, composite material automobile doorsill structure intensity is improved, when side collision occurs for automobile, reduces automobile door sill intrusion volume,
And impact energy is absorbed to guarantee passenger safety.
As shown in Fig. 2, for the schematic diagram of regular polygon cross-section anti-collision structure in the present embodiment.
As shown in figure 3, for the schematic cross-section of regular polygon cross-section anti-collision structure in the embodiment of the present invention.
The regular polygon cross-section fiber reinforcing texture ontology 110 is made of multiple regular polygon structural units 111,
It closely arranges between multiple regular polygon structural units 111, forms to each other the anti-collision structure of support mutually and mechanics transmitting.
Design has power transmission reinforcing prop 111-2 at center in the regular polygon structural unit 111.In regular polygon knot
In structure unit 111, power transmission reinforcing prop 111-2 is connected by hard spot on trapezoidal reinforcing rib 111-1 and regular polygon structural unit 111
It connects, power transmission reinforcing prop 111-2 is longitudinally used as a continuous column structure that can effectively transmit from vehicle body head-on crash in vehicle body
Impact energy, while the combination of power transmission reinforcing prop 111-2 and trapezoidal reinforcing rib 111-1 can be by the side collision energy suffered by vehicle body
Amount effectively dispersion is transferred to other regular polygon structural units 111 in regular polygon cross-section fiber reinforcing texture ontology.
Further, the trapezoidal reinforcing rib 111-1 is isosceles trapezoid, wherein trapezoidal side and short transverse angle be 0 ° ~
5 °, trapezoidal reinforcing rib design utilize trapezoidal side and short transverse angle, make regular polygon cross-section anti-collision structure bear compared with
It, can be along incident angle crumple energy-absorbing when strong side collision.
In the present embodiment, regular polygon structural unit 111 uses regular hexagon, and preferred embodiment is positive hexagonal side length 20
Mm, 2 mm of preferred embodiment regular polygon structural unit thickness；It is preferred that power transmission reinforcing prop 111-2 diameter is 3 mm；It is preferred that trapezoidal side
It is 3 ° with short transverse angle
According to the above part size, ruler is carried out to the pultrude process mold of regular polygon cross-section fiber reinforcing texture ontology 110
Very little design.In the present embodiment, using the carbon fiber being laid with along regular polygon cross-section anti-collision structure length direction, pass through asphalt mixtures modified by epoxy resin
Rouge infiltration curing molding, epoxy resin pultrusion velocity interval of selection under pultrude process are used between 0.4 ~ 1 m/min
The carbon fiber being laid with along regular polygon cross-section anti-collision structure length direction can effective bearing vehicle body forward direction collision impact,
And the production of structure design and craft is more easy.
It is fine to regular polygon cross-section using sand paper after the molding of regular polygon cross-section fiber reinforcing texture ontology 110
Dimension 110 outer surface of enhancing structure ontology is polished, subsequent in regular polygon cross-section fiber reinforcing texture ontology 110 to guarantee
During outer surface wound and solidified regular polygon cross-section fiber reinforcing texture outer surface anti-impacting layer 120, provide coarse
Resin solidification surface.Regular polygon cross-section fiber reinforcing texture ontology 110 is placed in winding tooling, then in regular polygon
Cross-section fiber reinforcing texture ontology 110 is externally wrapped with fiber-reinforced tape, is wound in 45 ° of ﹢ and -45 ° of both directions just more
110 outside of side shape cross-section fiber reinforcing texture ontology, winding layer number are 1 ~ 3 layer, and it is fine to form the regular polygon cross-section
Tie up enhancing structure outer surface anti-impacting layer 120.The present embodiment is more preferable using impact strength, the higher aramid fiber enhancing of toughness
Adhesive tape, and 2 layers are harassed and disturbed by ± 45 ° of Lay up design, effectively carrying improves just more from the face external applied load of vehicle body lateral impact
The one-piece parts intensity of side shape cross-section anti-collision structure.
Further, it is reinforced in regular polygon cross-section fiber reinforcing texture ontology 110 after molding by harassing and disturbing, at it
Trapezoidal reinforcing rib 111-1 is formed by triangular cavity 130, by filling the foam section of high energy-absorbing ratio or filling in cavity
It is interior effectively to absorb collision energy using the plastic deformation of foam structure from foaming hardened foam, buffer suffered punching inside crew module
Power is hit, the safety guarantee of interior driver and passenger is improved.It is used and the consistent foam section of triangular cavity size in the present embodiment
Filling has preparation simply, easy to operate equal technological advantages.
Embodiment 2
In the present embodiment, regular polygon cross-section fiber reinforcing texture ontology 110 in regular polygon cross-section anti-collision structure 100,
Various dimensions fiber reinforcement in regular polygon cross-section fiber reinforcing texture ontology 110 is prepared using annular three-dimensional fibrage machine
The fibrage direction of preform, various dimensions fiber reinforced preform is set according to required being customized of force status
Various dimensions fiber reinforced preform is then passed through pultrude process equipment, with epoxy resin cure shape by meter under traction device
At regular polygon cross-section fiber reinforcing texture ontology 110.Compared in embodiment one along regular polygon cross-section anti-collision structure
The molding regular polygon cross-section fiber reinforcing texture ontology 110 of carbon fiber institute that length direction is laid with, has increasingly complex
Mechanics carry potential ability, fiber interlayer is more stable, but its moulding process is complex, and shaping speed is slower.
One of embodiment described above myopia presently preferred embodiments of the present invention is not intended as any shape of the invention
Limitation in formula, the equivalent reality of any simple deformation made in technical solution of the present invention, modification and other equivalent variationss
Example is applied, as long as being still within the scope of the technical scheme of the invention without departing from technical solution of the present invention content.
Claims (9)
1. a kind of regular polygon cross-section anti-collision structure applied to composite material automobile threshold, including regular polygon cross-section are fine
Tie up enhancing structure and energy-absorbing filler two parts；It is characterized by: regular polygon cross-section fiber reinforcing texture include ontology and
Outer surface anti-impacting layer；Regular polygon cross-section fiber reinforcing texture lateral profile section and automobile door sill inside cavities section etc.
Ratio, and regular polygon cross-section fiber reinforcing texture lateral profile section and automobile door sill inside cavities surface are provided with 0 ~ 1
The bonding gap of mm is bonded gap filling ductile structure glue, adhesive thickness 1mm, in regular polygon cross-section fiber reinforcement knot
Structure body exterior winds fiber-reinforced tape, and outer surface anti-impacting layer is wound in regular polygon etc. with 45 ° of ﹢ and -45 ° of both directions
Cross-section fibers enhancing structure outer body, winding layer number are 1 ~ 3 layer；Energy-absorbing filler is provided in body interior, energy-absorbing is filled out
Object is filled using the foam section of high energy-absorbing ratio or filling in the hardened foam that foams certainly in cavity.
2. a kind of regular polygon cross-section anti-collision structure applied to composite material automobile threshold according to claim 1,
It is characterized in that the regular polygon cross-section fiber reinforcing texture ontology is made of multiple regular polygon structural units.
3. a kind of regular polygon cross-section anti-collision structure applied to composite material automobile threshold according to claim 1,
It is characterized in that being provided with power transmission reinforcing prop at the regular polygon structural unit center, power transmission reinforcing prop passes through trapezoidal reinforcement
Muscle is connect with regular polygon structural unit hard spot, and power transmission reinforcing prop is longitudinally used as a continuous column structure that can effectively pass in vehicle body
Pass the impact energy from vehicle body head-on crash, while the combination of power transmission reinforcing prop and trapezoidal reinforcing rib can will be suffered by vehicle body
The energy efficient dispersion of side collision is transferred to other regular polygon structure lists in regular polygon cross-section fiber reinforcing texture ontology
Member.
4. a kind of regular polygon cross-section anti-collision structure applied to composite material automobile threshold according to claim 1,
It is characterized in that the regular polygon structural unit side length is 5 ~ 30 mm, the number on side is more than or equal to 4, preferably regular hexagon
Structural unit.
5. a kind of regular polygon cross-section anti-collision structure applied to composite material automobile threshold according to claim 1,
It is characterized in that the regular polygon structural unit is with a thickness of 2 ~ 3 mm.
6. a kind of regular polygon cross-section anti-collision structure applied to composite material automobile threshold according to claim 1,
It is characterized in that it is 3 ~ 5 mm that column diameter is reinforced in the power transmission.
7. a kind of regular polygon cross-section anti-collision structure applied to composite material automobile threshold according to claim 1,
It is characterized in that the trapezoidal reinforcing rib is isosceles trapezoid, wherein trapezoidal side and short transverse angle are 0 ° ~ 5 °.
8. a kind of regular polygon cross-section anti-collision structure applied to composite material automobile threshold according to claim 1,
It is characterized in that the regular polygon cross-section fiber reinforcing texture ontology, by along regular polygon cross-section anti-collision structure length
The carbon fibre preform of carbon fiber or braiding that direction is laid with infiltrates the curing molding under pultrude process by epoxy resin,
The epoxy resin pultrusion velocity interval of selection is 0.4 ~ 1 m/min.
9. a kind of regular polygon cross-section anti-collision structure applied to composite material automobile threshold according to claim 1,
It is characterized in that the regular polygon cross-section fiber reinforcing texture outer surface anti-impacting layer is by super after infiltration resin
One or more of high molecular weight polyethylene fiber, aramid fiber, boron fibre, carbon fiber, fiberglass adhesive tape.
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| CN201811092982.6A CN109436099B (en) | 2018-09-19 | 2018-09-19 | Regular polygon uniform-section anti-collision structure applied to composite material automobile threshold |
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| CN201811092982.6A CN109436099B (en) | 2018-09-19 | 2018-09-19 | Regular polygon uniform-section anti-collision structure applied to composite material automobile threshold |
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| CN111907137A (en) * | 2019-05-08 | 2020-11-10 | 丰田自动车株式会社 | Method for manufacturing sheet metal member and method for manufacturing automobile body |
| CN112249509A (en) * | 2020-09-01 | 2021-01-22 | 哈尔滨工业大学（深圳） | Energy-absorbing structure and energy-absorbing buffer device |
| CN113346178A (en) * | 2021-07-08 | 2021-09-03 | 哈尔滨工业大学（威海） | Power battery box for energy-absorbing anti-collision vehicle |
| CN113998012A (en) * | 2021-10-14 | 2022-02-01 | 上海瓴荣材料科技有限公司 | Carbon fiber composite material doorsill stiffening beam and manufacturing method thereof |
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| CN109436099B (en) | 2021-07-09 |
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