Reinforced Bulkhead with Embedded Support Member
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Solution Overview
Problem
In vehicle body structures, especially in unibody and semi-monocoque constructions, there is a need for enhanced structural integrity and stiffness to effectively distribute and manage loads without introducing residual stresses or dimensional distortions, particularly in areas where panels span large distances.
Innovation Solution
A reinforced bulkhead design featuring a high-integrity die-cast panel with an embedded extruded support member, bonded using adhesive and supplemented with fasteners, which provides a robust and uniform load transfer path between the frame rail and panel, enhancing structural integrity and stiffness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a separate body and frame construction is used in light-duty vehicles, then ease of manufacture is improved, but structural strength and stiffness deteriorate
Solution Approach 1:
The patent merges the body and frame into a unified load-carrying structure where the body panels themselves serve as load-bearing elements. This is achieved through integrated design features such as reinforced panel sections, strategically placed ribs, and optimized joint configurations that allow the body structure to function as both enclosure and structural support, eliminating the need for a separate non-load-carrying body attached to a frame.
Solution Approach 2:
The patent employs composite construction techniques combining different materials and structural elements within the body panels. This includes using high-strength steel in critical load-bearing areas, incorporating rigid foam insulation boards that provide both thermal insulation and structural reinforcement, and integrating plastic trim pieces that serve both aesthetic and structural functions. This multi-material approach optimizes both strength and manufacturability.
2Weight of moving object
If the vehicle body structure lacks a separate load-carrying internal frame, then weight is reduced, but structural stability deteriorates
Solution Approach 1:
The patent applies local quality by concentrating high-strength materials and reinforced structural features specifically at critical load-bearing locations within the body panels, such as door openings, window frames, and joint areas. The panel thickness and reinforcement density are optimized locally based on the specific load requirements of each region, rather than uniformly throughout the entire structure, thereby achieving high structural stability with minimized overall weight.
Solution Approach 2:
The patent utilizes curved and contoured panel designs rather than flat surfaces. The body panels incorporate complex curvatures and three-dimensional shaping that inherently increase structural stiffness and resistance to deformation. These curved geometries distribute loads more effectively across the panel surfaces, enhancing structural stability while maintaining lightweight construction.
3Weight of moving object
If panel thickness is reduced to decrease weight, then weight is improved, but strength deteriorates
Solution Approach 1:
The patent changes key parameters of the panel construction including using high-strength steel grades with superior yield strength, optimizing panel thickness to the minimum required for structural integrity, and adjusting the spacing and dimensions of reinforcing ribs. These parameter optimizations allow the use of thinner panels that reduce weight while maintaining or exceeding the strength requirements through improved material properties and structural design.
Solution Approach 2:
The patent segments the body panels into multiple reinforced zones with strategically placed ribs, stiffeners, and reinforcement elements. This segmentation allows each panel section to be optimized independently for its specific structural requirements, enabling thinner overall panel thickness while maintaining strength through localized reinforcement at critical areas.
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 solution achieves a significant increase in yield strength and structural integrity, allowing for a lighter and more rigid vehicle body structure that effectively manages loads and maintains precise dimensions, thereby improving the overall performance and reliability of the vehicle.
Implementation Method 1
an adhesive applied between the external form of the support member and the interfacing surfaces of the contour to thereby bond the support member to the panel
Implementation Method 2
a fastener configured to extend through the external form of the support member and one of the interfacing surfaces of the contour to thereby supplement the adhesive and fix the support member to the panel
Implementation Method 3
The panel may be a high-integrity die-casting, i.e., a casting formed while a vacuum is generated in the die, having consistent material properties
Implementation Method 4
The support member also includes a support member length configured to fit within the contour length and a boxed cross-section having a substantially uniform shape along the support member length
Data Source
AI summary
A bulkhead for a vehicle body structure includes a panel. The panel has a contour defined by a contour length and characterized by an open section having three surfaces in a cross-sectional view. The bulkhead also includes a support member embedded in the panel. The support member includes an external form configured to interface with and match at least two of the three surfaces of the contour. The support member also includes a support member length configured to fit within the contour length and a boxed cross-section having a substantially uniform shape along the support member length. The bulkhead additionally includes an adhesive applied between the external form of the support member and the interfacing surfaces of the contour to thereby bond the support member to the panel and reinforce the bulkhead. A vehicle having a structure with such a bulkhead is also considered.