What would be the effect of gluing layers of ballistic fabrics together (effectively, making it stiff), with a powerful adhesive, on the fabric's ability to resist penetration? Obviously, the adhesive itself will also resist the penetration, but that is not what I ask.
EDIT: Conecring Solar Mike comment about inertia, on howitworksdaily it said that "[kevlar] has a high tensile strength. This means it takes a huge amount of energy to make its fibres stretch even a little ... most will absorb the energy of the bullet by stretching a small amount."
So, does the stiffness from gluing will weaken the kevlar by not allowing it to strech, or it will actually make it stronger, because now it's harder to make them strech?
Example of kevlar properties from Fibermax:
Yarn Type 1111
Linear Density (nominal) [dtex] 1260
Linear Density (effective) [dtex] 1350
Finish Content [%] 0.7
Elongation at Break [%] 3.10
Breaking Tenacity [MPa] 2987
Breaking Strength [N] 280
Modulus [GPa] 91
Tube Size [mm] 290x94
Number of Bobbins x Weight per Bobbin [kg] 6 x 4.5 / 90 x 4.5