Honeycomb Plastic Inserts in Hollow Metal Vehicle Beams

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Solution Overview

Problem

Automotive manufacturers face the challenge of reducing vehicle body weight to meet fuel efficiency and emission regulations without compromising structural integrity and crashworthiness, as existing methods often require trade-offs between weight reduction and durability.

Innovation Solution

The use of hollow metal structural elements with localized plastic reinforcement, specifically a honeycomb structure, to provide structural integrity and energy absorption in critical areas of the vehicle body, such as beams, rails, and pillars, allowing for reduced metal thickness while maintaining safety standards.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Weight of moving object

If metal thickness is reduced to decrease weight, then weight reduction is achieved, but structural integrity and crashworthiness deteriorate

Engineering Contradiction:
Improvevehicle body weightVSAvoidstructural integrity
Core Design Contradiction:
Weight of moving objectVSStrength

Solution Approach 1:

The patent applies composite materials by combining metal structural elements with plastic reinforcement inserts. The plastic inserts are positioned within the hollow sections of metal components such as pillars, rails, and cross-members, creating a hybrid structure that leverages the strength-to-weight ratio advantages of plastic while maintaining the structural framework of metal. This composite approach allows for reduced metal thickness while preserving overall structural integrity and crashworthiness.

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The patent implements local quality by strategically placing plastic reinforcement inserts only in specific critical areas of the vehicle body structure, such as pillars, rails, and cross-members, rather than uniformly throughout the entire body. This localized reinforcement approach optimizes weight reduction by minimizing material usage in non-critical areas while maintaining strength where it is most needed for crashworthiness and structural performance.

Inventive Principle:
Principle #3Local quality

2Strength

If plastic reinforcement with honeycomb structure is used to maintain structural integrity, then strength is improved, but device complexity increases

Engineering Contradiction:
Improvestructural integrityVSAvoidstructural complexity
Core Design Contradiction:
StrengthVSDevice complexity

Solution Approach 1:

The patent utilizes porous materials by employing plastic inserts with honeycomb or cellular structures within the vehicle body components. These honeycomb structures provide high strength-to-weight ratios and effective energy absorption during crashes while occupying minimal space. The porous honeycomb geometry delivers superior structural performance compared to solid plastic, enabling weight reduction without compromising crashworthiness.

Inventive Principle:
Principle #31Porous materials

Solution Approach 2:

The patent applies the nesting principle by placing plastic reinforcement inserts inside the hollow sections of metal structural elements. The plastic inserts are nested within the metal pillars, rails, and cross-members, creating a compact hybrid structure where the plastic core provides reinforcement while the metal外壳 maintains the overall structural framework and connectivity.

Inventive Principle:
Principle #7Nested doll (Nesting)

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 hybrid metal-plastic solution achieves a significant weight reduction of up to 15% in vehicle body components while maintaining comparable crashworthiness to all-metal systems, enhancing energy absorption and durability without compromising passenger safety.

Implementation Method 1

a plastic reinforcement having a honeycomb structure, wherein the plastic reinforcement is located in the channel... enhancing energy absorption and durability without compromising passenger safety

Methodology Applied
Scientific EffectEnergy absorption: Deformation

Data Source

PatentEP2655169B1Reinforced body in white and method of making and using the same
Publication Date: 2015.09.02 SABIC GLOBAL TECHNOLOGIES BV
  • EP2655169B1 patent drawingFigure 1~4
  • EP2655169B1 patent drawingFigure 5~7
  • EP2655169B1 patent drawingFigure 8~9

AI summary

In various embodiments, a structural body of a vehicle comprises: a hollow metal component comprising walls that define a channel, wherein the metal vehicle component has a metal component length, and wherein the metal vehicle component is selected from the group consisting of beam, rail, pillar, chassis, floor rocker, and cross-bar, combinations comprising at least one of the foregoing; and a plastic reinforcement having a honeycomb structure, wherein the plastic reinforcement is located in the channel. The metal component can be a portion of the structural body of the vehicle.