Ballistic Garage Door Kit Composite Panel Design
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Solution Overview
Problem
Existing garage doors lack the capability to effectively absorb and prevent bullet penetration, leading to potential ricochets that can pose a danger to occupants and property.
Innovation Solution
A kit that converts a standard garage door into a bullet-resistant configuration by attaching a pair of aluminum panels with multiple plies of ballistic material between them, along with joint inserts and an external bumper, to absorb kinetic energy and trap bullets within the garage door.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standard garage door is used, then ease of installation and maintenance is maintained, but bullet resistance and ability to prevent ricochets is insufficient
Solution Approach 1:
The garage door incorporates a composite structure with an outer aluminum panel, an inner steel panel, and multiple plies of ballistic material (such as Kevlar, Twaron, or Spectra) sandwiched between them. This composite construction provides bullet resistance while maintaining a manageable structure that can be installed and maintained with reasonable effort.
Solution Approach 2:
The ballistic material is nested between the outer aluminum panel and inner steel panel, creating a layered sandwich structure. This nesting approach allows the ballistic protection to be integrated within the door assembly without requiring the entire door structure to be fundamentally redesigned, thus balancing reliability improvement with acceptable device complexity.
2Reliability
If ballistic material is added to the garage door, then bullet penetration resistance is improved, but weight and installation difficulty increase
Solution Approach 1:
The ballistic material used in the construction is in the form of thin flexible plies (such as Kevlar, Twaron, or Spectra fabric layers) rather than thick rigid materials. These thin films provide effective bullet penetration resistance while adding minimal weight to the garage door assembly, thus resolving the contradiction between protection and weight.
3Reliability
If steel core is used in security door, then bullet resistance is improved, but bullet ricochet risk increases
Solution Approach 1:
The outer aluminum panel is designed to be slightly softer than steel, allowing it to deform and absorb bullet kinetic energy through deformation rather than causing dangerous ricochets. The ballistic material layers then capture and dissipate the remaining bullet energy. This converts the potential harm of bullet ricochet into beneficial energy absorption through controlled deformation, eliminating the ricochet hazard while maintaining bullet resistance.
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 provides enhanced bullet resistance without altering the garage door's appearance, effectively stopping small to medium caliber bullets and preventing ricochets, while maintaining ease of installation and maintenance.
Implementation Method 1
The ballistic material trapped between the aluminum panels is effective to absorb kinetic energy carried by a bullet striking the exterior aluminum panel
Implementation Method 2
multiple plies of ballistic material between them, along with joint inserts and an external bumper, to absorb kinetic energy and trap bullets within the garage door
Data Source
AI summary
A ballistic garage door assembly and a kit for converting a standard garage door uses sheets of ballistic material secured to the exterior shell of the standard garage door panels along with inserts at the joints between adjacent garage door panels. Joint inserts applied to the horizontal ends of the garage door panels provide bullet resistant characteristics at the joints. Aluminum sheets with multiple plies of ballistic material between the aluminum sheets are applied to the entire garage door shell. Insulated foam is place on the innermost aluminum sheet to provide additional ballistic performance for the converted garage door. Increased levels of ballistic protection will utilize thicker aluminum panels and an additional external ballistic bumper to increase ballistic performance of the joints between the garage door panels. The outward aesthetic appearance of the garage door does not change appreciably, although a door lift with greater horsepower may be required.