Ballistic Panel Edge Binding to Prevent Ply Separation
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Solution Overview
Problem
Ballistic resistant panel assemblies experience ply separation near the peripheral edge upon impact, reducing resistance to ballistic projectiles and compromising their performance.
Innovation Solution
A binding layer is applied along the peripheral edges of a stack of ballistic resistant plies, with stitching or securement mechanisms to bind the plies together, enhancing integrity and preventing separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ballistic resistant panel assembly uses peripheral edge binding layer with stitching to prevent ply separation, then ballistic resistance and structural integrity at edges are improved, but device complexity and manufacturing complexity increase
Solution Approach 1:
The binding layer is segmented into different portions (first portion extending along first ballistic resistant ply, second portion extending along peripheral edges, third portion extending along second ballistic resistant ply) to provide targeted reinforcement where ply separation is most likely to occur during ballistic impact
Solution Approach 2:
The binding layer acts as an intermediary element between the ballistic resistant plies, using stitching mechanisms to bind multiple plies together at the peripheral edges, preventing direct separation while maintaining the flexibility and protective function of the individual plies
2Reliability
If binding layer extends along all peripheral edges of all plies, then ply separation is fully prevented, but manufacturing complexity and material usage increase
Solution Approach 1:
The binding layer is applied with local quality by extending along peripheral edges of less than all of the plurality of ballistic resistant plies, specifically targeting the first and second ballistic resistant plies where separation is most critical, rather than uniformly binding all plies throughout the entire panel assembly
Solution Approach 2:
The binding layer provides partial action by securing only the critical peripheral edge regions of selected plies rather than all plies, achieving sufficient edge integrity to prevent catastrophic failure while reducing manufacturing complexity and material requirements
Data Source
AI summary
A ballistic resistant panel assembly, which includes a plurality of ballistic resistant plies positioned in a stack. Further including: a binding layer having a first portion which extends along and overlying a first ply, a second portion which extends from the first portion and along peripheral edges of a less than all of the plurality of ballistic resistant plies in the stack; and a third portion which extends from the second portion and along a second ballistic resistant ply, such that the second ballistic resistant ply is positioned between the first ballistic resistant ply and the third portion of the binding layer. The assembly further includes a plurality of stitches which extend through the first and third portions of the binding layer and through the first and second ballistic resistant plies of the stack.