Curved-Web Aluminum Bumper Reinforcement for End-Crush Impact Resistance
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Solution Overview
Problem
Existing bumper reinforcement members, such as those described in Patent Document 1, have large distances between webs, lacking an effective support structure to enhance impact resistance in portions subjected to crushing processing.
Innovation Solution
A bumper reinforcement member made of an aluminum alloy extruded shape material, featuring a web group with first and second webs connected to outer and inner flanges, respectively. The webs are curved to form protruding shapes facing each other at both ends, creating a support structure that suppresses deformation and enhances impact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If crushing processing is applied to reduce distance between flanges at both ends, then design requirements are met, but impact resistance deteriorates due to increased deformation
Solution Approach 1:
The web group is divided into multiple individual webs (first web, second web, etc.) instead of a single continuous web. Each web is spaced apart to allow independent deformation, enabling the structure to absorb impact energy through controlled deformation of individual segments while maintaining overall structural integrity
Solution Approach 2:
The webs are given curved protruding shapes facing each other instead of straight configurations. This curvature allows the webs to deform in a controlled manner during impact, with the protruding portions making contact to provide mutual support and prevent excessive deformation of the flanges
2Ease of manufacture
If distance between webs is large, then manufacturing is simplified, but impact resistance deteriorates due to insufficient support structure
Solution Approach 1:
The web group incorporates webs with different local characteristics - some webs have protruding portions while others have recessed portions. This local variation in geometry creates specific contact points during deformation, providing enhanced mutual support exactly where needed during impact events
Data Source
AI summary
A bumper reinforcement member is made of an aluminum alloy extruded shape material and having an outer flange and inner flange separated from each other by a first flange distance. A first outer connection portion is separated from a second outer connection portion by an outer web distance shorter than the first flange distance, and the first inner connection portion is separated from the second inner connection portion by an inner web distance shorter than the first flange distance. The first web and the second web are respectively curved so as to have protruding shapes facing each other at both the end portions.