I play an abjuration wizard, and I recently encountered a situation where I wanted to take damage (in order to get a saving throw to permanently end an aboleth's charm effect that was only temporarily suppressed). So, I asked my party to hit me with an attack.
However, I realized that I had my Arcane Ward activated, and the wording of the feature seems to say that it always blocks any incoming damage unconditionally (PHB, p. 115):
Whenever you take damage, the ward takes the damage instead. If this damage reduces the ward to 0 hit points, you take any remaining damage.
I also don't see any language in the ability that would allow me to choose to dismiss the ward.
Luckily, in this case, the attacker was a rogue, and because I was letting him hit me, he got advantage and therefore Sneak Attack, which was enough to punch through the ward and deal a bit of damage to my actual HP with a single attack.
However, this raised the question:
If I actually want to take damage for some reason, is there anything in the Arcane Ward feature that lets me do so without needing to first reduce my ward to 0 HP?