Cargo Container Side Post Assemblies with Reinforcement Plates
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Solution Overview
Problem
Cargo carrying containers face a challenge in optimizing cargo storage space without compromising the integrity of the peripheral wall structure, which must withstand various loading forces while minimizing weight and material usage, as deeper side post assemblies increase rigidity but reduce volume, and lighter materials may fail under certain loads.
Innovation Solution
The design incorporates side post assemblies with a reinforcement plate that extends over the base, providing additional strength and rigidity without significantly increasing the depth, and uses a combination of materials like aluminum for panels and steel for reinforcement plates, secured through welding or fasteners, to create a balanced structure that maximizes storage space and resistance to loading forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the depth of side post assemblies is increased to enhance rigidity and resistance to bending, then the structural strength is improved, but the cargo storage volume is reduced
Solution Approach 1:
The side post assembly is divided into multiple segments: a base portion, vertical legs, and cross reinforcement members. The cross reinforcement members are spaced at intervals along the vertical legs, creating multiple reinforcement zones that provide bending resistance without requiring excessive depth. This segmented approach allows the structure to achieve rigidity through distributed reinforcement rather than relying solely on increased overall depth.
Solution Approach 2:
The side post assemblies utilize composite construction combining base material (such as aluminum or steel) with reinforcement members of different materials. The cross reinforcement members can be made from materials with different mechanical properties than the base posts, allowing optimization of strength-to-weight ratio. This composite approach enables enhanced rigidity without proportionally increasing depth, thereby preserving cargo volume.
2Strength
If the thickness of panels and side post assemblies is increased to compensate for reduced depth, then the structural strength is improved, but the overall weight of the container is increased
Solution Approach 1:
Rather than uniformly increasing the thickness of all panels and posts throughout the entire structure, the reinforcement members are strategically positioned at specific locations where bending stresses are highest. The cross reinforcement members are placed at intervals along the vertical legs, providing localized strengthening exactly where needed to resist bending forces. This targeted approach achieves the required strength without the weight penalty of uniformly thickening the entire structure.
Solution Approach 2:
The structure employs composite materials with different density and strength characteristics. Lighter materials can be used for the base posts while denser, stronger materials are used for the cross reinforcement members. This allows the structure to achieve high strength requirements at critical locations without increasing the overall weight of the entire container structure.
3Weight of stationary object
If lighter gauge materials are used for side post assemblies and panels to reduce weight, then the container weight is reduced, but the strength and reliability under loading forces is compromised
Solution Approach 1:
The side post assembly is segmented into a base portion made from lighter gauge material and separate cross reinforcement members made from stronger material. This segmentation allows the majority of the structure (the base posts and panels) to use lighter, weight-saving materials while the critical reinforcement elements use stronger materials only where needed to ensure reliability under loading forces.
Solution Approach 2:
The structure uses composite materials where lighter gauge materials are employed for the base posts and panels to minimize weight, while stronger, heavier materials are used for the cross reinforcement members to ensure structural reliability. This composite approach allows the overall container weight to be reduced while maintaining the strength and reliability required to withstand loading forces.
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 configuration enhances the structural integrity and resistance to bending while maintaining a balance between strength and weight, allowing for efficient use of space and reducing the risk of failure at logistics slots, thus optimizing the cargo container's performance under different loading conditions.
Implementation Method 1
secured through welding or fasteners
Data Source
AI summary
A cargo container having a floor and a peripheral wall structure extending upwardly from the floor and bounding a cargo storage space. The peripheral wall structure includes a plurality of side post assemblies. The peripheral wall structure further has a plurality of panels each having an inside surface facing the cargo storage space and an oppositely facing outside surface. Each of a plurality of side post assemblies has a body with a vertically extending length and a “U” shape as viewed in cross section taken transversely to the length of the body. Each side post assembly is secured to at least one of the panels and has: a) a base with a width; b) first and second legs projecting respectively from the first and second base ends; and c) first and second flanges projecting laterally oppositely respectively from the first and second legs. Each side post assembly further has a reinforcement plate that is secured to the base to reinforce the base.