Vehicle Hood Panel Localized Composite Structure
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Solution Overview
Problem
Current hood panel designs for vehicles face challenges in balancing impact absorption during pedestrian collisions with maintaining sufficient rigidity, as adjusting thickness or shape to enhance safety is limited by design constraints.
Innovation Solution
A laminated dual structure hood panel composed of alternating layers of reinforced fibers and resin, where the first layers provide a reinforced area for rigidity and the second layers form a shock absorption area with reduced strength and rigidity, allowing for enhanced safety and design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the thickness of the hood panel is increased to improve pedestrian safety during collision, then the impact absorption capability is improved, but the rigidity of the hood panel deteriorates and design flexibility is limited
Solution Approach 1:
The hood panel employs different material compositions in different regions: the first layer uses a reinforced fiber-resin composite for rigidity at the periphery, while the second layer uses a resin-only composition for shock absorption at the central impact area. This local differentiation allows simultaneous optimization of both rigidity and impact absorption without compromising overall structural integrity.
Solution Approach 2:
The invention uses a laminated composite structure combining two distinct material systems: a fiber-reinforced resin layer for structural strength and a pure resin layer for energy absorption. This composite approach enables the hood panel to exhibit both high rigidity in certain zones and high ductility in others, resolving the contradiction between strength and impact absorption.
2Object-affected harmful factors
If the thickness of the hood panel is increased to improve pedestrian safety during collision, then the impact absorption capability is improved, but design flexibility based on vehicle type deteriorates
Solution Approach 1:
By implementing localized material differentiation rather than uniform thickness increase, the design can be adapted to various vehicle types and collision scenarios. The first layer's rigidity-providing structure and second layer's absorption-providing structure can be adjusted in area ratios and thicknesses to suit different vehicle categories while maintaining the dual-function capability.
Solution Approach 2:
The two-layer composite structure serves multiple functions simultaneously: structural support, impact energy absorption, and design adaptability. This multi-functional design allows the same basic structure to be applied across different vehicle types by modifying only the layer dimensions and material properties, not the fundamental structure.
Data Source
AI summary
A hood panel is provided. The hood panel includes a plurality of first layers formed of a reinforced fiber and a resin and a plurality of second layers including a complex portion formed of a reinforced fiber and a resin and a resin portion formed of a resin. The first layer and the second layers form a multilayer structure. A reinforced area is formed by the first layers and the complex portions of the second layers and a shock absorption area is formed by the first layers and the resin portions of the second layers.