Stackable Cargo Restraint Device Shear Stress Transfer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cargo restraint devices fail to effectively transfer tensile forces to shear stress, leading to inadequate cargo security during transportation, especially in containers of varying widths, and lack efficient stackability for storage.
Innovation Solution
A cargo restraint device comprising a strip with an adhesive, a sleeve, and gussets that transfers tensile forces to shear stress, featuring a compressible insert and stackable design with a handle, allowing for secure attachment to container walls and easy assembly/disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing cargo restraint devices are used, then cargo can be restrained, but tensile forces cannot be effectively transferred to shear stress, leading to inadequate cargo security
Solution Approach 1:
The device changes the stress state parameter from tensile to shear through its structural design. The strip and gusset configuration converts the tensile force applied by the elongated support into shear stress at the adhesive interface with the container wall, significantly improving force transfer capability and cargo security
Solution Approach 2:
The device combines multiple materials with different properties: an adhesive layer for bonding to the container wall, a rigid strip structure for force transmission, and gussets for structural reinforcement. This composite structure enables effective transfer of tensile forces to shear stress at the adhesive interface
2Reliability
If cargo restraint devices are designed for secure attachment, then cargo security is improved, but storage efficiency and stackability are reduced
Solution Approach 1:
The device features a cavity in the strip structure that can receive another device, creating a nested configuration during storage. This nesting capability allows multiple devices to be stacked vertically, improving storage efficiency while maintaining the secure attachment functionality when deployed
Solution Approach 2:
The device is segmented into functional components: a strip with adhesive for wall attachment, a sleeve for receiving the elongated support, gussets for structural strength, and a cavity for stacking. This segmentation allows the device to simultaneously achieve secure attachment and efficient stackability
3Reliability
If adhesive is applied to the bottom strip surface, then attachment to container walls is secured, but the device cannot be easily removed or repositioned
Solution Approach 1:
The adhesive connection provides a dynamic balance between secure attachment and controlled removal. The adhesive strength is sufficient to hold the device securely during cargo restraint operation, but allows for deliberate removal and repositioning when needed, enabling flexible deployment and adjustment
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 device provides enhanced cargo security by effectively transferring tensile forces to shear stress, accommodating different container widths, and offering improved stackability for storage, thereby reducing cargo damage and storage complexity.
Implementation Method 1
a strip having a bottom strip surface with an adhesive disposed thereon for securing the stackable device to one of the walls of the container
Data Source
AI summary
A stackable device for engaging an elongated support for restraining cargo in a container having a pair of opposed walls and configured to transfer to shear stress at least some of the tensile force applied by the elongated support. The stackable device invertably stackable with an other stackable device.