So basically, I was shooting with my new crossbow with said prod type I built from 1/2" tension bars, when I heard the sound of cracking near the prods after cocking the prod. I knew right away what was happening, and managed to decock the bow before anything exploded.
My prod consisted of three bars - 30", 26", and 22" in lengths. Inspection of the prod showed delamination cracks right on the center of the prod with the 30" and 26" bar. The last 22" bar appears fine. My powerstroke is 13" with a brace height of 1".
I know that for a bundle or laminate bow, the middle part of the prod is not suppose to bend to reduce strain at the middle. For my prod I know I did have a slight bend when cocked. Seeing how the cracks are isolated at the center, could it be that I was I putting too much strain there because the gap between my bars too close together? How can I prevent a second failure?
Pictures of the damage and the bow in question cocked: https://imgur.com/a/2WlMy