Oblique Groove Window for Blast Pressure Distribution
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Solution Overview
Problem
Existing bullet- and blast-resistant windows for vehicles are prone to deformation and potential collapse during strong blasts or explosions, posing a risk to passengers due to the forced displacement of the bulletproof glass pane within the vehicle.
Innovation Solution
A bullet- and blast-resistant window design featuring a ballistic block with layered composite glass or plastic materials, oblique V-shaped grooves for engagement with the vehicle body, and a ballistic insert to distribute blast pressure and prevent glass displacement, combined with an armoring device for enhanced structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protrusion is used to fix the bullet-proof glass pane in the door frame, then the window can be securely mounted, but the protrusion can break during strong blasts causing the glass pane to fall into the vehicle interior
Solution Approach 1:
The invention extracts the vulnerable protrusion element from the mounting system and replaces it with a groove-based engagement system. The groove is formed directly in the ballistic block, eliminating the need for separate protrusions that can break under blast loads. This extraction of the weak element resolves the contradiction by maintaining mounting reliability while eliminating blast-induced failure modes.
Solution Approach 2:
The groove structure provides beforehand cushioning by distributing blast pressures across its oblique surfaces before they can concentrate on weak points. The grooved configuration absorbs and redirects blast forces, preventing the kind of concentrated stress that causes protrusion failure and subsequent glass displacement into the vehicle interior.
2Ease of manufacture
If the window structure is simplified for ease of manufacture, then production costs decrease, but the window becomes more susceptible to deformation and shifting during blasts
Solution Approach 1:
The invention segments the ballistic block by forming grooves that divide the structure into distinct engagement zones. These grooves create multiple load paths and distribution points for blast forces, enhancing strength without requiring complex additional components. The segmentation is achieved through straightforward molding or machining operations, maintaining ease of manufacture while significantly improving blast resistance.
3Strength
If oblique grooves are added to distribute blast pressure, then resistance to deformation increases, but device complexity increases
Solution Approach 1:
The groove structure serves multiple functions simultaneously: it provides mechanical engagement between the ballistic block and the vehicle body, distributes blast pressures across its oblique surfaces, and prevents glass displacement. This multi-functionality achieves enhanced strength without proportionally increasing device complexity, as the same structural feature performs multiple protective roles.
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 effectively distributes blast pressure across a larger surface area, preventing window deformation and displacement, thereby enhancing passenger safety by maintaining the window's integrity and preventing glass fragments from entering the vehicle.
Implementation Method 1
a ballistic block having a peripheral face and a plurality of bullet-proof or bullet-resistant panes of glass, ceramic or plastic material bonded to each other over their surfaces in a layered composite or laminate, and interposed bonding interlayers of plastic material
Implementation Method 2
the affecting pressure of the blast is distributed onto a quite large surface of the oblique side walls of the peripheral groove
Implementation Method 3
a groove having lateral slopes or side walls that are at least partly oblique to an inside or outside surface of the window, for engagement with a part of the vehicle body
Implementation Method 4
a plurality of bullet-proof or bullet-resistant panes of glass, ceramic or plastic material bonded to each other over their surfaces in a layered composite or laminate, and interposed bonding interlayers of plastic material
Data Source
AI summary
The present invention refers to a bullet- and blast-resistant window, in particular for use in a motor vehicle, which comprises a ballistic block having a peripheral face and a plurality of panes of glass, ceramic or plastic material bonded to each other over their surfaces in a layered composite, and interposed bonding interlayers of plastic material or adhesive, wherein an edge groove having slopes at least partly inclined for engagement with a part of the vehicle body and extending on and along at least a part of the peripheral edge of the window.