plawolf
Lieutenant General
Sorry to bring up old topics.
But I've got question about the PL-15E's that India recovered during the border skirmish May 7th.
I saw pictures of the intact missile tube that India recovered, missing its warhead.
I want to ask, do PL-15 missiles set to self-destruct upon missing its targets?
If its warhead exploded, why didn't that also destroy the tube as well?
Missiles don’t need a self destruct because they are designed such that the warhead of the missile serves that exact purpose anyways. That is why the warhead is placed behind all of the electronics in the missile.
There is no known official cross section diagram for the PL15 in the open domain, but this one of the AIM120 illustrates the point just as well.

As for how the rear section remained so intact, the most obvious answer would be that the missile expended all rocket fuel prior to warhead detonation.
The warhead is a shaped charge, so the overwhelming majority of the force is directed forwards.
If there had been unspent fuel remaining, the rear section would have been destroyed, but its just an empty shell with some actuators, so no big deal to anyone recovering them.