CFRP Front Cabin Structure With Multi-Path Collision Reinforcement
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Solution Overview
Problem
The general CFRP reinforcing member structure lacks sufficient strength in the area surrounding the cabin, which affects its ability to improve torsional strength and may not meet forward collision regulations due to insufficient load path strength during collisions.
Innovation Solution
A front vehicle body structure incorporating an inner and outer cabin part made of carbon fiber reinforced plastic, with a reinforcement part connecting the two, including front and rear reinforcements, a sub-frame, and specific design features like cavity areas and flanges to diversify load transmission paths and enhance strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a general CFRP reinforcing member structure is used, then the vehicle body structure is simpler, but the strength and load path sufficiency are insufficient
Solution Approach 1:
The reinforcing member is divided into multiple segments including front reinforcing members, side reinforcing members, and rear reinforcing members. Each segment is independently configured to optimize its function in specific areas, allowing the structure to achieve high strength without requiring a completely different complex design
Solution Approach 2:
The reinforcing member structure extends in multiple spatial dimensions with front, side, and rear components arranged to form a comprehensive load-bearing network. This multi-dimensional arrangement enhances strength by distributing loads across different spatial paths rather than relying on a single structural element
2Strength
If the CFRP reinforcing member structure lacks surrounding area, then the structure is simpler, but the torsional strength improvement is insufficient
Solution Approach 1:
The reinforcing member is segmented into front, side, and rear portions that collectively surround the cabin area. This segmentation allows the structure to achieve comprehensive surrounding coverage without requiring a single large complex component, thereby improving torsional strength through distributed reinforcement
Solution Approach 2:
The reinforcing member structure serves multiple functions including torsional reinforcement, load path provision, and cabin protection. By designing a unified multi-functional structure that performs these various roles, the patent achieves comprehensive surrounding area coverage without proportionally increasing structural complexity
3Reliability
If the load path strength is insufficient, then the structure is simpler, but the forward collision regulation compliance is not met
Solution Approach 1:
The reinforcing member structure is pre-configured with optimized geometry and material distribution to ensure adequate load path strength before collision occurs. The front, side, and rear segments are designed in advance to work together as an integrated load-bearing system, ensuring collision regulation compliance without requiring complex active response mechanisms
Solution Approach 2:
The reinforcing member incorporates curved and angled configurations in its front, side, and rear segments to optimize load transmission paths. These geometric features enhance the structure's ability to distribute collision forces efficiently through the vehicle body, improving collision performance without requiring additional complex components
Data Source
AI summary
An embodiment front vehicle body structure includes an inner cabin part, an outer cabin part, and a reinforcement part mounted between the inner cabin part and the outer cabin part. The inner cabin part, the outer cabin part and the reinforcement part each comprise a carbon fiber reinforced plastic material.