Well, there is probably some sort of explanation of how it really works, but I was just bored and started thinking and this is what I came up with.
The titanium plating of the armor is infused with another metal, which with the help of Mjolnir’s computer tech can produce a “neutral” magnetic field around the armor. Neutral not being the actual charge of the field, but sort of a description as it is made to repel anything with a positive or negative charge to it.
Instead of the shielding actually deflecting incoming projectiles, it slows them down so that they do not penetrate the titanium alloy armor. Now when a projectile comes into contact with the field, the entire field is weakened. However, the one spot where the projectile impacted the field is generally weaker than the rest.
The reason behind the entire shields stability being lowered, is that the field was produced as one and takes damage as one. The impacted area will need to “suck” some of the energy out of the entire field to stop the projectile, while depleting most of its own to do so. As more and more projectiles hit the shield system it becomes harder for it to slow down each projectile.
Explosions and shotgun style weapons are very effective, as they overload the shield by striking the shield with multiple objects at once.
In my previous statements, the “projectile” was a single object, explosions and shotguns propel multiple projectiles which impact on a surface “fast” enough to say they “hit all at the same time”.
They hit the shielding system multiple times before its able to move extra energy to the damaged spots causing the shield to collapse and the titanium armor becomes vulnerable.
The explosion has fragmentation as well as a small EMP that is dispersed upon detonation of said explosive. The EMP however is only a small one and weak at that. It is the combination of EMP and shrapnel that would knock the shielding system down. This, however factors majorly on the position of said explosive, and the distance away from the blast zone. The farther the EMP will have to go the weaker it will get. Almost the same with shrapnel, although it is a solid projectile and can go a lot farther than the EMP could.
We will place our test subject just outside the range of the EMP’s area of effect. The shrapnel will hit the shielding system for sure, and cause it to lose a decent amount of strength, but the shrapnel isn’t as big or direct as shot from the shotgun.
The next test the subject will be placed in side the EMP’s area of effect.
When the explosive goes off, the first thing in the air is the shrapnel, then comes our EMP, and then heat/shockwave from the actual explosion.
The subject is struck in multiple spots weakening the shield system drastically, as we are even closer and the shrapnel has less distance to go, therefore it hits harder, as well as less of a spread, meaning more shrapnel hit the target than before.
Now lets move on to the EMP. An EMP is an Electro Magnetic Pulse. The EMP will interfere with the shielding system computer’s ability to function properly causing the already damaged shields to collapse.
The heat and shockwave from the explosion will damage the armor/test subject causing disorientation, and injuries like broken bones and fractures, burns, and possibly death.
Most of these examples are kind of made with the idea of a REAL set of Mjolnir powered assault armor being used in a realistic environment. If you have any comments or notice any large flaws in my theory please reply and whatnot. Also, please keep in mind that this is a THEORY not an actual statement of how I think the armor works. More of a statement of how i think it might work in a realistic life like environment.