Vehicle Body Impact Absorbing Structure for Breaking Load Control
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Solution Overview
Problem
Existing vehicle body structures face challenges in controlling the breaking load during a collision using energy-absorbing castings, making it difficult to effectively manage impact forces and prevent them from entering the vehicle cabin.
Innovation Solution
A vehicle body structure with an impact absorbing portion comprising multiple areas, each with varying load-bearing capacities, including a low load area, high load area, and breakage suppression area, designed to absorb impact energy sequentially and control the breaking load by increasing rigidity and cross-section height along the impact direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If an energy absorbing casting is provided to absorb impact force, then impact energy can be absorbed, but the breaking load cannot be controlled in various deformation modes
Solution Approach 1:
The impact absorbing portion is divided into multiple areas with different load bearing capacities. Each area has specific structural characteristics (such as different cross-sectional areas, wall thicknesses, or reinforcement patterns) that enable it to absorb impact energy while allowing controlled deformation at predetermined locations. This local differentiation of structural properties enables both energy absorption and breaking load control.
2Strength
If the impact absorbing portion has high load bearing capacity throughout, then structural strength is improved, but impact energy cannot be effectively absorbed
Solution Approach 1:
The impact absorbing portion is segmented into multiple areas with progressively different load bearing capacities. This segmentation allows the structure to have varying strength characteristics along its length, enabling it to absorb impact energy through controlled deformation in lower strength areas while maintaining overall structural integrity through higher strength areas.
Solution Approach 2:
Different areas of the impact absorbing portion are designed with different structural properties (such as varying wall thickness, cross-sectional area, or reinforcement patterns) to create localized differences in load bearing capacity. This allows the structure to be strong where needed while being designed to deform controllably in specific zones to absorb impact energy.
3Loss of energy
If the breaking load is controlled to be low, then impact energy absorption is improved, but the structure becomes too weak to protect the vehicle cabin
Solution Approach 1:
The impact absorbing portion is divided into multiple areas with different load bearing capacities, creating a progressive deformation pattern. This segmentation allows the structure to have low breaking load characteristics in specific areas for energy absorption while maintaining high strength in other areas to protect the vehicle cabin.
Solution Approach 2:
The structure incorporates local variations in load bearing capacity, with certain areas designed to deform at lower loads for energy absorption while other areas maintain high strength to protect the cabin. This local differentiation resolves the contradiction between controlled breaking and overall structural strength.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The structure efficiently absorbs impact energy, reducing the impact load transmitted to the vehicle cabin by controlling the breaking load through sequential deformation, thereby minimizing the impact experienced by occupants.
Implementation Method 1
an impact absorbing portion 14 which includes plural areas, and a load bearing capacity with respect to input of an impact load F is different in the plural areas
Data Source
AI summary
A vehicle body structure is provided with an impact absorbing portion that includes plural areas, each of the plural areas having a different load bearing capacity corresponding to a stroke with respect to input of an impact load.