Bumper Structural Body Quadrilateral Intermediate Member
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current bumper structural bodies face inefficiencies in energy absorption due to buckling and cracking of the bumper reinforcement, leading to potential damage to rear parts and inadequate energy absorption during collisions.
Innovation Solution
A bumper structural body design featuring a bumper reinforcement, energy absorbing members, and intermediate members arranged between them, forming a quadrilateral configuration with specific angle and line length relationships to distribute stress and facilitate efficient energy absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the radius of curvature of the bumper reinforcement is reduced to meet design requirements, then the fine wrapping performance is improved, but stress concentrations occur in the energy absorbing members and bumper reinforcement, causing buckling or cracking before energy absorption can occur
Solution Approach 1:
A stress relief member is introduced as an intermediary component between the bumper reinforcement and the energy absorbing member. This intermediate element mediates the stress transmission, preventing direct stress concentration at the curved portions of the bumper reinforcement and the front ends of the energy absorbing member, thereby resolving the contradiction between achieving small radius of curvature for fine wrapping performance and preventing buckling/cracking for reliability.
2Loss of energy
If the bumper reinforcement buckles to absorb impact energy, then energy absorption is achieved, but control of the bumper becomes difficult and damage to rear parts may occur
Solution Approach 1:
The stress relief member acts as a mediator that controls the deformation sequence during impact. By preventing premature buckling of the bumper reinforcement through stress redistribution, the member ensures that the bumper reinforcement maintains its structural integrity and control stability while the energy absorbing member performs the intended energy absorption function through controlled deformation.
Solution Approach 2:
The bumper structural body is segmented into distinct functional zones: the bumper reinforcement for structural support, the stress relief member for stress management, and the energy absorbing member for energy dissipation. This segmentation allows each component to perform its specific function without interfering with the stability and control of other parts, enabling energy absorption while maintaining bumper control stability.
3Weight of moving object
If the bumper reinforcement is made thinner to reduce weight, then weight reduction is achieved, but the bumper reinforcement becomes more susceptible to buckling and cracking under impact
Solution Approach 1:
The stress relief member serves as a protective intermediary that compensates for the reduced strength of thinner bumper reinforcement. By redistributing and relieving stresses away from the vulnerable thin-walled sections, the stress relief member enables the use of lighter bumper reinforcement while maintaining overall impact resistance through the combined system architecture.
Solution Approach 2:
The invention changes the stress distribution parameters in the bumper structure by introducing the stress relief member. This alters the stress flow path, reducing peak stresses in the bumper reinforcement and energy absorbing member, thereby allowing the use of lighter materials or thinner sections while maintaining sufficient impact resistance.
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
This design effectively suppresses buckling and cracking of the bumper reinforcement, enabling stable and efficient energy absorption during collisions, as demonstrated by finite element method analysis.
Implementation Method 1
an intermediate member arranged between the bumper reinforcement and the energy absorbing member, and joined to each of the bumper reinforcement and the energy absorbing member
Implementation Method 2
energy absorbing members deform to suppress damage to the vehicle body
Implementation Method 3
impact is received by the bumper reinforcement and the energy absorbing members deform to suppress damage to the vehicle body
Data Source
AI summary
A bumper structural body (100) includes a bumper reinforcement (10), energy absorbing members (30a, 30b), and intermediate members (50a, 50b). The sloped sections (12a, 12b) of the bumper reinforcement (10) are connected to the energy absorbing members (30a, 30b) and the intermediate members (50a, 50b). The intermediate members (50a, 50b) are each formed in a quadrilateral by connecting a first portion (51) contacting the energy absorbing member (30a, 30b), a second portion (52) contacting the bumper reinforcement (10), and portions connecting the first portion (51) and the second portion (52).