I see references to his "untimely death". Yet, I have never been able to find out what happened. I'm curious, does anyone know what happened to him?
Incidentally, many of his papers can be found at the following link for free:
https://orbi.uliege.be/browse?type=authorulg&rpp=20&value=Fraeijs+de+Ve…
I expect some of his papers would be of interest to mechanicians.